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Pneumonia - Wikipedia

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<button aria-controls="toc-Cause-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Cause subsection</span> </button> <ul id="toc-Cause-sublist" class="vector-toc-list"> <li id="toc-Bacteria" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Bacteria"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.1</span> <span>Bacteria</span> </div> </a> <ul id="toc-Bacteria-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Viruses" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Viruses"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.2</span> <span>Viruses</span> </div> </a> <ul id="toc-Viruses-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Fungi" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Fungi"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.3</span> <span>Fungi</span> </div> </a> <ul id="toc-Fungi-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Parasites" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Parasites"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.4</span> <span>Parasites</span> </div> </a> <ul id="toc-Parasites-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Noninfectious" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Noninfectious"> <div class="vector-toc-text"> <span class="vector-toc-numb">2.5</span> <span>Noninfectious</span> </div> </a> <ul id="toc-Noninfectious-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Mechanisms" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Mechanisms"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Mechanisms</span> </div> </a> <button aria-controls="toc-Mechanisms-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Mechanisms subsection</span> </button> <ul id="toc-Mechanisms-sublist" class="vector-toc-list"> <li id="toc-Bacterial" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Bacterial"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Bacterial</span> </div> </a> <ul id="toc-Bacterial-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Viral" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Viral"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Viral</span> </div> </a> <ul id="toc-Viral-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Diagnosis" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Diagnosis"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Diagnosis</span> </div> </a> <button aria-controls="toc-Diagnosis-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Diagnosis subsection</span> </button> <ul id="toc-Diagnosis-sublist" class="vector-toc-list"> <li id="toc-Diagnosis_in_children" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Diagnosis_in_children"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Diagnosis in children</span> </div> </a> <ul id="toc-Diagnosis_in_children-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Diagnosis_in_adults" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Diagnosis_in_adults"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>Diagnosis in adults</span> </div> </a> <ul id="toc-Diagnosis_in_adults-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Physical_exam" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Physical_exam"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.3</span> <span>Physical exam</span> </div> </a> <ul id="toc-Physical_exam-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Imaging" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Imaging"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.4</span> <span>Imaging</span> </div> </a> <ul id="toc-Imaging-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Microbiology" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Microbiology"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.5</span> <span>Microbiology</span> </div> </a> <ul id="toc-Microbiology-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Classification" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Classification"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.6</span> <span>Classification</span> </div> </a> <ul id="toc-Classification-sublist" class="vector-toc-list"> <li id="toc-Community" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Community"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.6.1</span> <span>Community</span> </div> </a> <ul id="toc-Community-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Healthcare" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Healthcare"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.6.2</span> <span>Healthcare</span> </div> </a> <ul id="toc-Healthcare-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Differential_diagnosis" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Differential_diagnosis"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.7</span> <span>Differential diagnosis</span> </div> </a> <ul id="toc-Differential_diagnosis-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Prevention" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Prevention"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Prevention</span> </div> </a> <button aria-controls="toc-Prevention-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Prevention subsection</span> </button> <ul id="toc-Prevention-sublist" class="vector-toc-list"> <li id="toc-Vaccination" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Vaccination"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1</span> <span>Vaccination</span> </div> </a> <ul id="toc-Vaccination-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Medications" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Medications"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2</span> <span>Medications</span> </div> </a> <ul id="toc-Medications-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Other" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Other"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.3</span> <span>Other</span> </div> </a> <ul id="toc-Other-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Management" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Management"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Management</span> </div> </a> <button aria-controls="toc-Management-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Management subsection</span> </button> <ul id="toc-Management-sublist" class="vector-toc-list"> <li id="toc-Bacterial_2" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Bacterial_2"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.1</span> <span>Bacterial</span> </div> </a> <ul id="toc-Bacterial_2-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Viral_2" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Viral_2"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.2</span> <span>Viral</span> </div> </a> <ul id="toc-Viral_2-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Aspiration" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Aspiration"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.3</span> <span>Aspiration</span> </div> </a> <ul id="toc-Aspiration-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Follow-up" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Follow-up"> <div class="vector-toc-text"> <span class="vector-toc-numb">6.4</span> <span>Follow-up</span> </div> </a> <ul id="toc-Follow-up-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Prognosis" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Prognosis"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Prognosis</span> </div> </a> <button aria-controls="toc-Prognosis-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Prognosis subsection</span> </button> <ul id="toc-Prognosis-sublist" class="vector-toc-list"> <li id="toc-Clinical_prediction_rules" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Clinical_prediction_rules"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.1</span> <span>Clinical prediction rules</span> </div> </a> <ul id="toc-Clinical_prediction_rules-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Pleural_effusion,_empyema,_and_abscess" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Pleural_effusion,_empyema,_and_abscess"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.2</span> <span>Pleural effusion, empyema, and abscess</span> </div> </a> <ul id="toc-Pleural_effusion,_empyema,_and_abscess-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Respiratory_and_circulatory_failure" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Respiratory_and_circulatory_failure"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.3</span> <span>Respiratory and circulatory failure</span> </div> </a> <ul id="toc-Respiratory_and_circulatory_failure-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Epidemiology" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Epidemiology"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Epidemiology</span> </div> </a> <button aria-controls="toc-Epidemiology-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Epidemiology subsection</span> </button> <ul id="toc-Epidemiology-sublist" class="vector-toc-list"> <li id="toc-Children" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Children"> <div class="vector-toc-text"> <span class="vector-toc-numb">8.1</span> <span>Children</span> </div> </a> <ul id="toc-Children-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-History" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#History"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>History</span> </div> </a> <ul id="toc-History-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Society_and_culture" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#Society_and_culture"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Society and culture</span> </div> </a> <button aria-controls="toc-Society_and_culture-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Society and culture subsection</span> </button> <ul id="toc-Society_and_culture-sublist" class="vector-toc-list"> <li id="toc-Awareness" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Awareness"> <div class="vector-toc-text"> <span class="vector-toc-numb">10.1</span> <span>Awareness</span> </div> </a> <ul id="toc-Awareness-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Costs" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Costs"> <div class="vector-toc-text"> <span class="vector-toc-numb">10.2</span> <span>Costs</span> </div> </a> <ul id="toc-Costs-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>References</span> </div> </a> <button aria-controls="toc-References-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle References subsection</span> </button> <ul id="toc-References-sublist" class="vector-toc-list"> <li id="toc-Bibliography" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Bibliography"> <div class="vector-toc-text"> <span class="vector-toc-numb">11.1</span> <span>Bibliography</span> </div> </a> <ul id="toc-Bibliography-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">12</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Pneumonia</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 133 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-133" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">133 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Longontsteking" title="Longontsteking – Afrikaans" lang="af" hreflang="af" data-title="Longontsteking" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Lungenentz%C3%BCndung" title="Lungenentzündung – Alemannic" lang="gsw" hreflang="gsw" data-title="Lungenentzündung" data-language-autonym="Alemannisch" data-language-local-name="Alemannic" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-am mw-list-item"><a href="https://am.wikipedia.org/wiki/%E1%8A%92%E1%88%9E%E1%8A%95%E1%8B%AB" title="ኒሞንያ – Amharic" lang="am" hreflang="am" data-title="ኒሞንያ" data-language-autonym="አማርኛ" data-language-local-name="Amharic" class="interlanguage-link-target"><span>አማርኛ</span></a></li><li class="interlanguage-link interwiki-ar badge-Q17437798 badge-goodarticle mw-list-item" title="good article badge"><a href="https://ar.wikipedia.org/wiki/%D8%B0%D8%A7%D8%AA_%D8%A7%D9%84%D8%B1%D8%A6%D8%A9" title="ذات الرئة – Arabic" lang="ar" hreflang="ar" data-title="ذات الرئة" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Pneumon%C3%ADa" title="Pneumonía – Aragonese" lang="an" hreflang="an" data-title="Pneumonía" data-language-autonym="Aragonés" data-language-local-name="Aragonese" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-hyw mw-list-item"><a href="https://hyw.wikipedia.org/wiki/%D4%B9%D5%B8%D6%84%D5%A1%D5%BF%D5%A1%D5%BA" title="Թոքատապ – Western Armenian" lang="hyw" hreflang="hyw" data-title="Թոքատապ" data-language-autonym="Արեւմտահայերէն" data-language-local-name="Western Armenian" class="interlanguage-link-target"><span>Արեւմտահայերէն</span></a></li><li class="interlanguage-link interwiki-as mw-list-item"><a href="https://as.wikipedia.org/wiki/%E0%A6%A8%E0%A6%BF%E0%A6%89%E0%A6%AE%27%E0%A6%A8%E0%A6%BF%E0%A6%AF%E0%A6%BC%E0%A6%BE" title="নিউম&#039;নিয়া – Assamese" lang="as" hreflang="as" data-title="নিউম&#039;নিয়া" data-language-autonym="অসমীয়া" data-language-local-name="Assamese" class="interlanguage-link-target"><span>অসমীয়া</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Neumon%C3%ADa" title="Neumonía – Asturian" lang="ast" hreflang="ast" data-title="Neumonía" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-awa mw-list-item"><a href="https://awa.wikipedia.org/wiki/%E0%A4%A8%E0%A5%8D%E0%A4%AF%E0%A5%82%E0%A4%AE%E0%A5%8B%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%BE" title="न्यूमोनिया – Awadhi" lang="awa" hreflang="awa" data-title="न्यूमोनिया" data-language-autonym="अवधी" data-language-local-name="Awadhi" class="interlanguage-link-target"><span>अवधी</span></a></li><li class="interlanguage-link interwiki-gn mw-list-item"><a href="https://gn.wikipedia.org/wiki/Vev%C3%BAi_rasy" title="Vevúi rasy – Guarani" lang="gn" hreflang="gn" data-title="Vevúi rasy" data-language-autonym="Avañe&#039;ẽ" data-language-local-name="Guarani" class="interlanguage-link-target"><span>Avañe'ẽ</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/A%C4%9Fciy%C9%99r_iltihab%C4%B1" title="Ağciyər iltihabı – Azerbaijani" lang="az" hreflang="az" data-title="Ağciyər iltihabı" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D8%A2%D8%BA%E2%80%8C%D8%AC%DB%8C%DB%8C%D8%B1_%D8%A7%DB%8C%D9%84%D8%AA%DB%8C%D9%87%D8%A7%D8%A8%DB%8C" title="آغ‌جییر ایلتیهابی – South Azerbaijani" lang="azb" hreflang="azb" data-title="آغ‌جییر ایلتیهابی" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target"><span>تۆرکجه</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%A8%E0%A6%BF%E0%A6%89%E0%A6%AE%E0%A7%8B%E0%A6%A8%E0%A6%BF%E0%A6%AF%E0%A6%BC%E0%A6%BE" title="নিউমোনিয়া – Bangla" lang="bn" hreflang="bn" data-title="নিউমোনিয়া" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/H%C3%AC-i%C4%81m" title="Hì-iām – Minnan" lang="nan" hreflang="nan" data-title="Hì-iām" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D0%B2%D0%BC%D0%BE%D0%BD%D0%B8%D1%8F" title="Пневмония – Bashkir" lang="ba" hreflang="ba" data-title="Пневмония" data-language-autonym="Башҡортса" data-language-local-name="Bashkir" class="interlanguage-link-target"><span>Башҡортса</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D1%9E%D0%BC%D0%B0%D0%BD%D1%96%D1%8F" title="Пнеўманія – Belarusian" lang="be" hreflang="be" data-title="Пнеўманія" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%9F%D0%BD%D1%8D%D1%9E%D0%BC%D0%B0%D0%BD%D1%96%D1%8F" title="Пнэўманія – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Пнэўманія" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D0%B2%D0%BC%D0%BE%D0%BD%D0%B8%D1%8F" title="Пневмония – Bulgarian" lang="bg" hreflang="bg" data-title="Пневмония" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bo mw-list-item"><a href="https://bo.wikipedia.org/wiki/%E0%BD%82%E0%BE%B3%E0%BD%BC%E0%BC%8B%E0%BD%9A%E0%BD%91%E0%BC%8B" title="གློ་ཚད་ – Tibetan" lang="bo" hreflang="bo" data-title="གློ་ཚད་" data-language-autonym="བོད་ཡིག" data-language-local-name="Tibetan" class="interlanguage-link-target"><span>བོད་ཡིག</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Upala_plu%C4%87a" title="Upala pluća – Bosnian" lang="bs" hreflang="bs" data-title="Upala pluća" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Tanijenn_skevent" title="Tanijenn skevent – Breton" lang="br" hreflang="br" data-title="Tanijenn skevent" data-language-autonym="Brezhoneg" data-language-local-name="Breton" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-bxr mw-list-item"><a href="https://bxr.wikipedia.org/wiki/%D0%A3%D1%83%D1%88%D1%85%D0%B0%D0%BD%D0%B0%D0%B9_%D1%85%D0%B0%D0%B4%D1%85%D0%B0%D0%BB%D1%8F%D0%B0" title="Уушханай хадхаляа – Russia Buriat" lang="bxr" hreflang="bxr" data-title="Уушханай хадхаляа" data-language-autonym="Буряад" data-language-local-name="Russia Buriat" class="interlanguage-link-target"><span>Буряад</span></a></li><li class="interlanguage-link interwiki-ca badge-Q17437798 badge-goodarticle mw-list-item" title="good article badge"><a href="https://ca.wikipedia.org/wiki/Pneum%C3%B2nia" title="Pneumònia – Catalan" lang="ca" hreflang="ca" data-title="Pneumònia" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Z%C3%A1pal_plic" title="Zápal plic – Czech" lang="cs" hreflang="cs" data-title="Zápal plic" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-sn mw-list-item"><a href="https://sn.wikipedia.org/wiki/Chibayo" title="Chibayo – Shona" lang="sn" hreflang="sn" data-title="Chibayo" data-language-autonym="ChiShona" data-language-local-name="Shona" class="interlanguage-link-target"><span>ChiShona</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Niwmonia" title="Niwmonia – Welsh" lang="cy" hreflang="cy" data-title="Niwmonia" data-language-autonym="Cymraeg" data-language-local-name="Welsh" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da badge-Q17559452 badge-recommendedarticle mw-list-item" title="recommended article"><a href="https://da.wikipedia.org/wiki/Lungebet%C3%A6ndelse" title="Lungebetændelse – Danish" lang="da" hreflang="da" data-title="Lungebetændelse" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-pdc mw-list-item"><a href="https://pdc.wikipedia.org/wiki/Bruschtfiewer" title="Bruschtfiewer – Pennsylvania German" lang="pdc" hreflang="pdc" data-title="Bruschtfiewer" data-language-autonym="Deitsch" data-language-local-name="Pennsylvania German" class="interlanguage-link-target"><span>Deitsch</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Lungenentz%C3%BCndung" title="Lungenentzündung – German" lang="de" hreflang="de" data-title="Lungenentzündung" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-dv mw-list-item"><a href="https://dv.wikipedia.org/wiki/%DE%82%DE%A8%DE%87%DE%AA%DE%89%DE%AF%DE%82%DE%A8%DE%94%DE%A7" title="ނިއުމޯނިޔާ – Divehi" lang="dv" hreflang="dv" data-title="ނިއުމޯނިޔާ" data-language-autonym="ދިވެހިބަސް" data-language-local-name="Divehi" class="interlanguage-link-target"><span>ދިވެހިބަސް</span></a></li><li class="interlanguage-link interwiki-dz mw-list-item"><a href="https://dz.wikipedia.org/wiki/%E0%BD%82%E0%BE%B3%E0%BD%BC%E0%BC%8B%E0%BD%82%E0%BD%85%E0%BD%BC%E0%BD%84%E0%BC%8B%E0%BD%93%E0%BD%91%E0%BC%8D" title="གློ་གཅོང་ནད། – Dzongkha" lang="dz" hreflang="dz" data-title="གློ་གཅོང་ནད།" data-language-autonym="ཇོང་ཁ" data-language-local-name="Dzongkha" class="interlanguage-link-target"><span>ཇོང་ཁ</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Kopsup%C3%B5letik" title="Kopsupõletik – Estonian" lang="et" hreflang="et" data-title="Kopsupõletik" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A0%CE%BD%CE%B5%CF%85%CE%BC%CE%BF%CE%BD%CE%AF%CE%B1" title="Πνευμονία – Greek" lang="el" hreflang="el" data-title="Πνευμονία" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Neumon%C3%ADa" title="Neumonía – Spanish" lang="es" hreflang="es" data-title="Neumonía" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Pne%C5%ADmonito" title="Pneŭmonito – Esperanto" lang="eo" hreflang="eo" data-title="Pneŭmonito" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Pneumonia" title="Pneumonia – Basque" lang="eu" hreflang="eu" data-title="Pneumonia" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B3%DB%8C%D9%86%D9%87%E2%80%8C%D9%BE%D9%87%D9%84%D9%88" title="سینه‌پهلو – Persian" lang="fa" hreflang="fa" data-title="سینه‌پهلو" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-hif mw-list-item"><a href="https://hif.wikipedia.org/wiki/Pneumonia" title="Pneumonia – Fiji Hindi" lang="hif" hreflang="hif" data-title="Pneumonia" data-language-autonym="Fiji Hindi" data-language-local-name="Fiji Hindi" class="interlanguage-link-target"><span>Fiji Hindi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Pneumonie_aigu%C3%AB" title="Pneumonie aiguë – French" lang="fr" hreflang="fr" data-title="Pneumonie aiguë" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Long%C3%BBntstekking" title="Longûntstekking – Western Frisian" lang="fy" hreflang="fy" data-title="Longûntstekking" data-language-autonym="Frysk" data-language-local-name="Western Frisian" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Ni%C3%BAm%C3%B3ine" title="Niúmóine – Irish" lang="ga" hreflang="ga" data-title="Niúmóine" data-language-autonym="Gaeilge" data-language-local-name="Irish" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/Am_fiabhras-cl%C3%A8ibhe" title="Am fiabhras-clèibhe – Scottish Gaelic" lang="gd" hreflang="gd" data-title="Am fiabhras-clèibhe" data-language-autonym="Gàidhlig" data-language-local-name="Scottish Gaelic" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Pneumon%C3%ADa" title="Pneumonía – Galician" lang="gl" hreflang="gl" data-title="Pneumonía" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%8F%90%EB%A0%B4" title="폐렴 – Korean" lang="ko" hreflang="ko" data-title="폐렴" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-ha mw-list-item"><a href="https://ha.wikipedia.org/wiki/Ciwon_huhu" title="Ciwon huhu – Hausa" lang="ha" hreflang="ha" data-title="Ciwon huhu" data-language-autonym="Hausa" data-language-local-name="Hausa" class="interlanguage-link-target"><span>Hausa</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D4%B9%D5%B8%D6%84%D5%A1%D5%A2%D5%B8%D6%80%D5%A2" title="Թոքաբորբ – Armenian" lang="hy" hreflang="hy" data-title="Թոքաբորբ" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%A8%E0%A5%8D%E0%A4%AF%E0%A5%82%E0%A4%AE%E0%A5%8B%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%BE" title="न्यूमोनिया – Hindi" lang="hi" hreflang="hi" data-title="न्यूमोनिया" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Pneumonija" title="Pneumonija – Croatian" lang="hr" hreflang="hr" data-title="Pneumonija" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Pulmonito" title="Pulmonito – Ido" lang="io" hreflang="io" data-title="Pulmonito" data-language-autonym="Ido" data-language-local-name="Ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-ilo mw-list-item"><a href="https://ilo.wikipedia.org/wiki/Pulmonia" title="Pulmonia – Iloko" lang="ilo" hreflang="ilo" data-title="Pulmonia" data-language-autonym="Ilokano" data-language-local-name="Iloko" class="interlanguage-link-target"><span>Ilokano</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Radang_paru-paru" title="Radang paru-paru – Indonesian" lang="id" hreflang="id" data-title="Radang paru-paru" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Lungnab%C3%B3lga" title="Lungnabólga – Icelandic" lang="is" hreflang="is" data-title="Lungnabólga" data-language-autonym="Íslenska" data-language-local-name="Icelandic" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://it.wikipedia.org/wiki/Polmonite" title="Polmonite – Italian" lang="it" hreflang="it" data-title="Polmonite" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%93%D7%9C%D7%A7%D7%AA_%D7%A8%D7%99%D7%90%D7%95%D7%AA" title="דלקת ריאות – Hebrew" lang="he" hreflang="he" data-title="דלקת ריאות" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%A8%E0%B3%8D%E0%B2%AF%E0%B3%81%E0%B2%AE%E0%B3%8B%E0%B2%A8%E0%B2%BF%E0%B2%AF" title="ನ್ಯುಮೋನಿಯ – Kannada" lang="kn" hreflang="kn" data-title="ನ್ಯುಮೋನಿಯ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="Kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%9E%E1%83%9C%E1%83%94%E1%83%95%E1%83%9B%E1%83%9D%E1%83%9C%E1%83%98%E1%83%90" title="პნევმონია – Georgian" lang="ka" hreflang="ka" data-title="პნევმონია" data-language-autonym="ქართული" data-language-local-name="Georgian" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-ks mw-list-item"><a href="https://ks.wikipedia.org/wiki/%D9%86%D9%85%D9%88%D9%86%DB%8C%D8%A7" title="نمونیا – Kashmiri" lang="ks" hreflang="ks" data-title="نمونیا" data-language-autonym="कॉशुर / کٲشُر" data-language-local-name="Kashmiri" class="interlanguage-link-target"><span>कॉशुर / کٲشُر</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D0%B2%D0%BC%D0%BE%D0%BD%D0%B8%D1%8F" title="Пневмония – Kazakh" lang="kk" hreflang="kk" data-title="Пневмония" data-language-autonym="Қазақша" data-language-local-name="Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-rn mw-list-item"><a href="https://rn.wikipedia.org/wiki/Umusonga" title="Umusonga – Rundi" lang="rn" hreflang="rn" data-title="Umusonga" data-language-autonym="Ikirundi" data-language-local-name="Rundi" class="interlanguage-link-target"><span>Ikirundi</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Nimonia" title="Nimonia – Swahili" lang="sw" hreflang="sw" data-title="Nimonia" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Nemoni" title="Nemoni – Haitian Creole" lang="ht" hreflang="ht" data-title="Nemoni" data-language-autonym="Kreyòl ayisyen" data-language-local-name="Haitian Creole" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-gcr mw-list-item"><a href="https://gcr.wikipedia.org/wiki/Pn%C3%A9moni_%C3%A9gi" title="Pnémoni égi – Guianan Creole" lang="gcr" hreflang="gcr" data-title="Pnémoni égi" data-language-autonym="Kriyòl gwiyannen" data-language-local-name="Guianan Creole" class="interlanguage-link-target"><span>Kriyòl gwiyannen</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Pneumonia" title="Pneumonia – Kurdish" lang="ku" hreflang="ku" data-title="Pneumonia" data-language-autonym="Kurdî" data-language-local-name="Kurdish" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D0%B2%D0%BC%D0%BE%D0%BD%D0%B8%D1%8F" title="Пневмония – Kyrgyz" lang="ky" hreflang="ky" data-title="Пневмония" data-language-autonym="Кыргызча" data-language-local-name="Kyrgyz" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-lld mw-list-item"><a href="https://lld.wikipedia.org/wiki/Pontes" title="Pontes – Ladin" lang="lld" hreflang="lld" data-title="Pontes" data-language-autonym="Ladin" data-language-local-name="Ladin" class="interlanguage-link-target"><span>Ladin</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Pneumonia" title="Pneumonia – Latin" lang="la" hreflang="la" data-title="Pneumonia" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Pneimonija" title="Pneimonija – Latvian" lang="lv" hreflang="lv" data-title="Pneimonija" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Longenentz%C3%BCndung" title="Longenentzündung – Luxembourgish" lang="lb" hreflang="lb" data-title="Longenentzündung" data-language-autonym="Lëtzebuergesch" data-language-local-name="Luxembourgish" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Plau%C4%8Di%C5%B3_u%C5%BEdegimas" title="Plaučių uždegimas – Lithuanian" lang="lt" hreflang="lt" data-title="Plaučių uždegimas" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lij mw-list-item"><a href="https://lij.wikipedia.org/wiki/Pneumoniae" title="Pneumoniae – Ligurian" lang="lij" hreflang="lij" data-title="Pneumoniae" data-language-autonym="Ligure" data-language-local-name="Ligurian" class="interlanguage-link-target"><span>Ligure</span></a></li><li class="interlanguage-link interwiki-li mw-list-item"><a href="https://li.wikipedia.org/wiki/L%C3%B3ng%C3%B3ntstaeking" title="Lóngóntstaeking – Limburgish" lang="li" hreflang="li" data-title="Lóngóntstaeking" data-language-autonym="Limburgs" data-language-local-name="Limburgish" class="interlanguage-link-target"><span>Limburgs</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Polmonita" title="Polmonita – Lombard" lang="lmo" hreflang="lmo" data-title="Polmonita" data-language-autonym="Lombard" data-language-local-name="Lombard" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-hu badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://hu.wikipedia.org/wiki/T%C3%BCd%C5%91gyullad%C3%A1s" title="Tüdőgyulladás – Hungarian" lang="hu" hreflang="hu" data-title="Tüdőgyulladás" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D0%B2%D0%BC%D0%BE%D0%BD%D0%B8%D1%98%D0%B0" title="Пневмонија – Macedonian" lang="mk" hreflang="mk" data-title="Пневмонија" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://ml.wikipedia.org/wiki/%E0%B4%A8%E0%B5%8D%E0%B4%AF%E0%B5%81%E0%B4%AE%E0%B5%8B%E0%B4%A3%E0%B4%BF%E0%B4%AF" title="ന്യുമോണിയ – Malayalam" lang="ml" hreflang="ml" data-title="ന്യുമോണിയ" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%A8%E0%A5%8D%E0%A4%AF%E0%A5%82%E0%A4%AE%E0%A5%8B%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%BE" title="न्यूमोनिया – Marathi" lang="mr" hreflang="mr" data-title="न्यूमोनिया" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target"><span>मराठी</span></a></li><li class="interlanguage-link interwiki-xmf mw-list-item"><a href="https://xmf.wikipedia.org/wiki/%E1%83%9E%E1%83%9C%E1%83%94%E1%83%95%E1%83%9B%E1%83%9D%E1%83%9C%E1%83%98%E1%83%90" title="პნევმონია – Mingrelian" lang="xmf" hreflang="xmf" data-title="პნევმონია" data-language-autonym="მარგალური" data-language-local-name="Mingrelian" class="interlanguage-link-target"><span>მარგალური</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%A7%D9%84%D8%AA%D9%87%D8%A7%D8%A8_%D8%B1%D8%A6%D9%88%D9%89" title="التهاب رئوى – Egyptian Arabic" lang="arz" hreflang="arz" data-title="التهاب رئوى" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Pneumonia" title="Pneumonia – Malay" lang="ms" hreflang="ms" data-title="Pneumonia" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-min mw-list-item"><a href="https://min.wikipedia.org/wiki/Pneumonia" title="Pneumonia – Minangkabau" lang="min" hreflang="min" data-title="Pneumonia" data-language-autonym="Minangkabau" data-language-local-name="Minangkabau" class="interlanguage-link-target"><span>Minangkabau</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Longontsteking" title="Longontsteking – Dutch" lang="nl" hreflang="nl" data-title="Longontsteking" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%A8%E0%A5%8D%E0%A4%AF%E0%A5%81%E0%A4%AE%E0%A5%8B%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%BE" title="न्युमोनिया – Nepali" lang="ne" hreflang="ne" data-title="न्युमोनिया" data-language-autonym="नेपाली" data-language-local-name="Nepali" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-new mw-list-item"><a href="https://new.wikipedia.org/wiki/%E0%A4%A8%E0%A4%BF%E0%A4%AE%E0%A5%8B%E0%A4%A8%E0%A4%BF%E0%A4%AF%E0%A4%BE" title="निमोनिया – Newari" lang="new" hreflang="new" data-title="निमोनिया" data-language-autonym="नेपाल भाषा" data-language-local-name="Newari" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E8%82%BA%E7%82%8E" title="肺炎 – Japanese" lang="ja" hreflang="ja" data-title="肺炎" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ce mw-list-item"><a href="https://ce.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D0%B2%D0%BC%D0%BE%D0%BD%D0%B8" title="Пневмони – Chechen" lang="ce" hreflang="ce" data-title="Пневмони" data-language-autonym="Нохчийн" data-language-local-name="Chechen" class="interlanguage-link-target"><span>Нохчийн</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Lungebetennelse" title="Lungebetennelse – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Lungebetennelse" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Lungebetennelse" title="Lungebetennelse – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Lungebetennelse" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Pneumonia" title="Pneumonia – Occitan" lang="oc" hreflang="oc" data-title="Pneumonia" data-language-autonym="Occitan" data-language-local-name="Occitan" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-or mw-list-item"><a href="https://or.wikipedia.org/wiki/%E0%AC%A8%E0%AC%BF%E0%AC%AE%E0%AD%8B%E0%AC%A8%E0%AC%BF%E0%AC%86" title="ନିମୋନିଆ – Odia" lang="or" hreflang="or" data-title="ନିମୋନିଆ" data-language-autonym="ଓଡ଼ିଆ" data-language-local-name="Odia" class="interlanguage-link-target"><span>ଓଡ଼ିଆ</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Zotiljam" title="Zotiljam – Uzbek" lang="uz" hreflang="uz" data-title="Zotiljam" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%A8%E0%A8%AE%E0%A9%8B%E0%A8%A8%E0%A9%80%E0%A8%86" title="ਨਮੋਨੀਆ – Punjabi" lang="pa" hreflang="pa" data-title="ਨਮੋਨੀਆ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Punjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D9%86%D9%85%D9%88%D9%86%DB%8C%D8%A7" title="نمونیا – Western Punjabi" lang="pnb" hreflang="pnb" data-title="نمونیا" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D8%B3%DB%8C%D9%86%D9%87_%D8%A8%D8%BA%D9%84" title="سینه بغل – Pashto" lang="ps" hreflang="ps" data-title="سینه بغل" data-language-autonym="پښتو" data-language-local-name="Pashto" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-km mw-list-item"><a href="https://km.wikipedia.org/wiki/%E1%9E%87%E1%9F%86%E1%9E%84%E1%9E%BA%E1%9E%9A%E1%9E%9B%E1%9E%B6%E1%9E%80%E1%9E%91%E1%9E%84%E1%9E%9F%E1%9E%BD%E1%9E%8F" title="ជំងឺរលាកទងសួត – Khmer" lang="km" hreflang="km" data-title="ជំងឺរលាកទងសួត" data-language-autonym="ភាសាខ្មែរ" data-language-local-name="Khmer" class="interlanguage-link-target"><span>ភាសាខ្មែរ</span></a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Lungensweer" title="Lungensweer – Low German" lang="nds" hreflang="nds" data-title="Lungensweer" data-language-autonym="Plattdüütsch" data-language-local-name="Low German" class="interlanguage-link-target"><span>Plattdüütsch</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Zapalenie_p%C5%82uc" title="Zapalenie płuc – Polish" lang="pl" hreflang="pl" data-title="Zapalenie płuc" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Pneumonia" title="Pneumonia – Portuguese" lang="pt" hreflang="pt" data-title="Pneumonia" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro badge-Q17437798 badge-goodarticle mw-list-item" title="good article badge"><a href="https://ro.wikipedia.org/wiki/Pneumonie" title="Pneumonie – Romanian" lang="ro" hreflang="ro" data-title="Pneumonie" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D0%B2%D0%BC%D0%BE%D0%BD%D0%B8%D1%8F" title="Пневмония – Russian" lang="ru" hreflang="ru" data-title="Пневмония" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D0%B2%D0%BC%D0%BE%D0%BD%D0%B8%D1%8F" title="Пневмония – Yakut" lang="sah" hreflang="sah" data-title="Пневмония" data-language-autonym="Саха тыла" data-language-local-name="Yakut" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Pneumonie" title="Pneumonie – Scots" lang="sco" hreflang="sco" data-title="Pneumonie" data-language-autonym="Scots" data-language-local-name="Scots" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Pneumonia" title="Pneumonia – Albanian" lang="sq" hreflang="sq" data-title="Pneumonia" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Purmun%C3%ACa" title="Purmunìa – Sicilian" lang="scn" hreflang="scn" data-title="Purmunìa" data-language-autonym="Sicilianu" data-language-local-name="Sicilian" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%B1%E0%B7%92%E0%B6%BA%E0%B7%94%E0%B6%B8%E0%B7%9D%E0%B6%B1%E0%B7%92%E0%B6%BA%E0%B7%8F%E0%B7%80" title="නියුමෝනියාව – Sinhala" lang="si" hreflang="si" data-title="නියුමෝනියාව" data-language-autonym="සිංහල" data-language-local-name="Sinhala" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Pneumonia" title="Pneumonia – Simple English" lang="en-simple" hreflang="en-simple" data-title="Pneumonia" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Pneum%C3%B3nia" title="Pneumónia – Slovak" lang="sk" hreflang="sk" data-title="Pneumónia" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Plju%C4%8Dnica" title="Pljučnica – Slovenian" lang="sl" hreflang="sl" data-title="Pljučnica" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%B3%DB%8C%DB%95%D8%B3%DB%86" title="سیەسۆ – Central Kurdish" lang="ckb" hreflang="ckb" data-title="سیەسۆ" data-language-autonym="کوردی" data-language-local-name="Central Kurdish" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%97%D0%B0%D0%BF%D0%B0%D1%99%D0%B5%D1%9A%D0%B5_%D0%BF%D0%BB%D1%83%D1%9B%D0%B0" title="Запаљење плућа – Serbian" lang="sr" hreflang="sr" data-title="Запаљење плућа" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Upala_plu%C4%87a" title="Upala pluća – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Upala pluća" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-fi badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://fi.wikipedia.org/wiki/Keuhkokuume" title="Keuhkokuume – Finnish" lang="fi" hreflang="fi" data-title="Keuhkokuume" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Lunginflammation" title="Lunginflammation – Swedish" lang="sv" hreflang="sv" data-title="Lunginflammation" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Pulmonya" title="Pulmonya – Tagalog" lang="tl" hreflang="tl" data-title="Pulmonya" data-language-autonym="Tagalog" data-language-local-name="Tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%A8%E0%AF%81%E0%AE%B0%E0%AF%88%E0%AE%AF%E0%AF%80%E0%AE%B0%E0%AE%B2%E0%AF%8D_%E0%AE%85%E0%AE%B4%E0%AE%B1%E0%AF%8D%E0%AE%9A%E0%AE%BF" title="நுரையீரல் அழற்சி – Tamil" lang="ta" hreflang="ta" data-title="நுரையீரல் அழற்சி" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-kab mw-list-item"><a href="https://kab.wikipedia.org/wiki/Buturin" title="Buturin – Kabyle" lang="kab" hreflang="kab" data-title="Buturin" data-language-autonym="Taqbaylit" data-language-local-name="Kabyle" class="interlanguage-link-target"><span>Taqbaylit</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D0%B2%D0%BC%D0%BE%D0%BD%D0%B8%D1%8F" title="Пневмония – Tatar" lang="tt" hreflang="tt" data-title="Пневмония" data-language-autonym="Татарча / tatarça" data-language-local-name="Tatar" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%A8%E0%B1%8D%E0%B0%AF%E0%B1%81%E0%B0%AE%E0%B1%8B%E0%B0%A8%E0%B0%BF%E0%B0%AF%E0%B0%BE" title="న్యుమోనియా – Telugu" lang="te" hreflang="te" data-title="న్యుమోనియా" data-language-autonym="తెలుగు" data-language-local-name="Telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B8%9B%E0%B8%AD%E0%B8%94%E0%B8%9A%E0%B8%A7%E0%B8%A1" title="ปอดบวม – Thai" lang="th" hreflang="th" data-title="ปอดบวม" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target"><span>ไทย</span></a></li><li class="interlanguage-link interwiki-din mw-list-item"><a href="https://din.wikipedia.org/wiki/A%C5%8Buotpuou" title="Aŋuotpuou – Dinka" lang="din" hreflang="din" data-title="Aŋuotpuou" data-language-autonym="Thuɔŋjäŋ" data-language-local-name="Dinka" class="interlanguage-link-target"><span>Thuɔŋjäŋ</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D0%B2%D0%BC%D0%BE%D0%BD%D0%B8%D1%8F" title="Пневмония – Tajik" lang="tg" hreflang="tg" data-title="Пневмония" data-language-autonym="Тоҷикӣ" data-language-local-name="Tajik" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Zat%C3%BCrre" title="Zatürre – Turkish" lang="tr" hreflang="tr" data-title="Zatürre" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tk mw-list-item"><a href="https://tk.wikipedia.org/wiki/Pnewmoni%C3%BDa" title="Pnewmoniýa – Turkmen" lang="tk" hreflang="tk" data-title="Pnewmoniýa" data-language-autonym="Türkmençe" data-language-local-name="Turkmen" class="interlanguage-link-target"><span>Türkmençe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%9F%D0%BD%D0%B5%D0%B2%D0%BC%D0%BE%D0%BD%D1%96%D1%8F" title="Пневмонія – Ukrainian" lang="uk" hreflang="uk" data-title="Пневмонія" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D9%86%D9%85%D9%88%D9%86%DB%8C%D8%A7" title="نمونیا – Urdu" lang="ur" hreflang="ur" data-title="نمونیا" data-language-autonym="اردو" data-language-local-name="Urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/Polmonite" title="Polmonite – Venetian" lang="vec" hreflang="vec" 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srcset="//upload.wikimedia.org/wikipedia/en/thumb/1/1b/Semi-protection-shackle.svg/30px-Semi-protection-shackle.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/1/1b/Semi-protection-shackle.svg/40px-Semi-protection-shackle.svg.png 2x" data-file-width="512" data-file-height="512" /></a></span></div></div> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Inflammation of the alveoli of the lungs</div> <p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Not to be confused with <a href="/wiki/Pneumonitis" title="Pneumonitis">Pneumonitis</a>.</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">For other uses, see <a href="/wiki/Pneumonia_(disambiguation)" class="mw-disambig" title="Pneumonia (disambiguation)">Pneumonia (disambiguation)</a>.</div> <p class="mw-empty-elt"> </p> <div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Medical condition</div><style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox ib-medical-condition"><tbody><tr><th colspan="2" class="infobox-above" style="background:#ccc">Pneumonia</th></tr><tr><th scope="row" class="infobox-label">Other names</th><td class="infobox-data">Pneumonitis</td></tr><tr style="background-color: #f8f9fa;"><td colspan="2" class="infobox-full-data"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Chest_radiograph_in_influensa_and_H_influenzae,_posteroanterior,_annotated.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/81/Chest_radiograph_in_influensa_and_H_influenzae%2C_posteroanterior%2C_annotated.jpg/220px-Chest_radiograph_in_influensa_and_H_influenzae%2C_posteroanterior%2C_annotated.jpg" decoding="async" width="220" height="191" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/81/Chest_radiograph_in_influensa_and_H_influenzae%2C_posteroanterior%2C_annotated.jpg/330px-Chest_radiograph_in_influensa_and_H_influenzae%2C_posteroanterior%2C_annotated.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/81/Chest_radiograph_in_influensa_and_H_influenzae%2C_posteroanterior%2C_annotated.jpg/440px-Chest_radiograph_in_influensa_and_H_influenzae%2C_posteroanterior%2C_annotated.jpg 2x" data-file-width="1163" data-file-height="1010" /></a></span></td></tr><tr><td colspan="2" class="infobox-full-data"><a href="/wiki/Chest_radiograph" title="Chest radiograph">Chest X-ray</a> of a pneumonia caused by <a href="/wiki/Influenza" title="Influenza">influenza</a> and <i><a href="/wiki/Haemophilus_influenzae" title="Haemophilus influenzae">Haemophilus influenzae</a></i>, with patchy consolidations, mainly in the right upper lobe (arrow)</td></tr><tr><th scope="row" class="infobox-label">Pronunciation</th><td class="infobox-data"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style><div class="plainlist"><ul><li><span class="rt-commentedText nowrap"><span class="IPA nopopups noexcerpt" lang="en-fonipa"><a href="/wiki/Help:IPA/English" title="Help:IPA/English">/<span style="border-bottom:1px dotted"><span title="/nj/: &#39;n&#39; in &#39;new&#39;">nj</span><span title="/uː/: &#39;oo&#39; in &#39;goose&#39;">uː</span><span title="/ˈ/: primary stress follows">ˈ</span><span title="&#39;m&#39; in &#39;my&#39;">m</span><span title="/oʊ/: &#39;o&#39; in &#39;code&#39;">oʊ</span><span title="&#39;n&#39; in &#39;nigh&#39;">n</span><span title="/i/: &#39;y&#39; in &#39;happy&#39;">i</span><span title="/ə/: &#39;a&#39; in &#39;about&#39;">ə</span></span>/</a></span></span> <a href="/wiki/Help:Pronunciation_respelling_key" title="Help:Pronunciation respelling key"><i title="English pronunciation respelling">new-<span style="font-size:90%">MOHN</span>-ee-ə</i></a>&#x20;</li></ul></div></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Medical_specialty" title="Medical specialty">Specialty</a></th><td class="infobox-data"><a href="/wiki/Pulmonology" title="Pulmonology">Pulmonology</a>, <a href="/wiki/Infectious_disease_(medical_specialty)" class="mw-redirect" title="Infectious disease (medical specialty)">infectious disease</a></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Signs_and_symptoms" title="Signs and symptoms">Symptoms</a></th><td class="infobox-data">Cough, <a href="/wiki/Shortness_of_breath" title="Shortness of breath">shortness of breath</a>, chest pain, fever<sup id="cite_ref-NIH2_1-0" class="reference"><a href="#cite_note-NIH2-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label">Duration</th><td class="infobox-data">Few weeks<sup id="cite_ref-Behera2010_2-0" class="reference"><a href="#cite_note-Behera2010-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label">Causes</th><td class="infobox-data">Bacteria, virus, <a href="/wiki/Aspiration_pneumonia" title="Aspiration pneumonia">aspiration</a><sup id="cite_ref-RespText09_3-0" class="reference"><a href="#cite_note-RespText09-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Jeff2010_4-0" class="reference"><a href="#cite_note-Jeff2010-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Risk_factor" title="Risk factor">Risk factors</a></th><td class="infobox-data"><a href="/wiki/Cystic_fibrosis" title="Cystic fibrosis">Cystic fibrosis</a>, <a href="/wiki/COPD" class="mw-redirect" title="COPD">COPD</a>, <a href="/wiki/Sickle_cell_disease" title="Sickle cell disease">sickle cell disease</a>, <a href="/wiki/Asthma" title="Asthma">asthma</a>, <a href="/wiki/Diabetes_mellitus" class="mw-redirect" title="Diabetes mellitus">diabetes</a>, heart failure, history of smoking, very young age, older age<sup id="cite_ref-NIH2022_5-0" class="reference"><a href="#cite_note-NIH2022-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref--BMJ2012_6-0" class="reference"><a href="#cite_note--BMJ2012-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-CDC2020SCD_7-0" class="reference"><a href="#cite_note-CDC2020SCD-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Medical_diagnosis" title="Medical diagnosis">Diagnostic method</a></th><td class="infobox-data">Based on symptoms, <a href="/wiki/Chest_X-ray" class="mw-redirect" title="Chest X-ray">chest X-ray</a><sup id="cite_ref-NIH2011Diag_8-0" class="reference"><a href="#cite_note-NIH2011Diag-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Differential_diagnosis" title="Differential diagnosis">Differential diagnosis</a></th><td class="infobox-data"><a href="/wiki/COPD" class="mw-redirect" title="COPD">COPD</a>, <a href="/wiki/Asthma" title="Asthma">asthma</a>, <a href="/wiki/Pulmonary_edema" title="Pulmonary edema">pulmonary edema</a>, <a href="/wiki/Pulmonary_embolism" title="Pulmonary embolism">pulmonary embolism</a><sup id="cite_ref-BMJ06_9-0" class="reference"><a href="#cite_note-BMJ06-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label">Prevention</th><td class="infobox-data"><a href="/wiki/Vaccine" title="Vaccine">Vaccines</a>, <a href="/wiki/Handwashing" class="mw-redirect" title="Handwashing">handwashing</a>, not smoking<sup id="cite_ref-NIH2011Pre_10-0" class="reference"><a href="#cite_note-NIH2011Pre-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Medication" title="Medication">Medication</a></th><td class="infobox-data"><a href="/wiki/Antibiotic" title="Antibiotic">Antibiotics</a>, <a href="/wiki/Antiviral" class="mw-redirect" title="Antiviral">antivirals</a>, <a href="/wiki/Oxygen_therapy" title="Oxygen therapy">oxygen therapy</a><sup id="cite_ref-NIH2011Tx_11-0" class="reference"><a href="#cite_note-NIH2011Tx-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Lancet11_12-0" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label">Frequency</th><td class="infobox-data">450 million (7%) per year<sup id="cite_ref-Lancet11_12-1" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-CochraneTx13_13-0" class="reference"><a href="#cite_note-CochraneTx13-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup></td></tr><tr><th scope="row" class="infobox-label">Deaths</th><td class="infobox-data">Four million per year<sup id="cite_ref-Lancet11_12-2" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-CochraneTx13_13-1" class="reference"><a href="#cite_note-CochraneTx13-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup></td></tr></tbody></table> <p><b>Pneumonia</b> is an <a href="/wiki/Inflammation" title="Inflammation">inflammatory</a> condition of the <a href="/wiki/Lung" title="Lung">lung</a> primarily affecting the small air sacs known as <a href="/wiki/Pulmonary_alveolus" title="Pulmonary alveolus">alveoli</a>.<sup id="cite_ref-RespText09_3-1" class="reference"><a href="#cite_note-RespText09-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-AcuteCare09_14-0" class="reference"><a href="#cite_note-AcuteCare09-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> Symptoms typically include some combination of <a href="/wiki/Cough#Classification" title="Cough">productive or dry cough</a>, <a href="/wiki/Chest_pain" title="Chest pain">chest pain</a>, fever, and <a href="/wiki/Shortness_of_breath" title="Shortness of breath">difficulty breathing</a>.<sup id="cite_ref-Ash2007_15-0" class="reference"><a href="#cite_note-Ash2007-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> The severity of the condition is variable.<sup id="cite_ref-Ash2007_15-1" class="reference"><a href="#cite_note-Ash2007-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> </p><p>Pneumonia is usually caused by infection with viruses or bacteria, and less commonly by other <a href="/wiki/Microorganism" title="Microorganism">microorganisms</a>.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">&#91;</span>a<span class="cite-bracket">&#93;</span></a></sup> Identifying the responsible pathogen can be difficult. Diagnosis is often based on symptoms and <a href="/wiki/Physical_examination" title="Physical examination">physical examination</a>.<sup id="cite_ref-NIH2011Diag_8-1" class="reference"><a href="#cite_note-NIH2011Diag-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Chest_X-ray" class="mw-redirect" title="Chest X-ray">Chest X-rays</a>, blood tests, and <a href="/wiki/Microbiological_culture" title="Microbiological culture">culture</a> of the <a href="/wiki/Sputum" title="Sputum">sputum</a> may help confirm the diagnosis.<sup id="cite_ref-NIH2011Diag_8-2" class="reference"><a href="#cite_note-NIH2011Diag-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup> The disease may be classified by where it was acquired, such as community- or hospital-acquired or healthcare-associated pneumonia.<sup id="cite_ref-19" class="reference"><a href="#cite_note-19"><span class="cite-bracket">&#91;</span>18<span class="cite-bracket">&#93;</span></a></sup> </p><p>Risk factors for pneumonia include <a href="/wiki/Cystic_fibrosis" title="Cystic fibrosis">cystic fibrosis</a>, <a href="/wiki/Chronic_obstructive_pulmonary_disease" title="Chronic obstructive pulmonary disease">chronic obstructive pulmonary disease</a> (COPD), <a href="/wiki/Sickle_cell_disease" title="Sickle cell disease">sickle cell disease</a>, <a href="/wiki/Asthma" title="Asthma">asthma</a>, <a href="/wiki/Diabetes" title="Diabetes">diabetes</a>, heart failure, a history of smoking, a poor ability to cough (such as following a stroke), and a <a href="/wiki/Immunosuppression" title="Immunosuppression">weak immune system</a>.<sup id="cite_ref-NIH2022_5-1" class="reference"><a href="#cite_note-NIH2022-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-CDC2020SCD_7-1" class="reference"><a href="#cite_note-CDC2020SCD-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup> </p><p><a href="/wiki/Vaccine" title="Vaccine">Vaccines</a> to prevent certain types of pneumonia (such as those caused by <i><a href="/wiki/Streptococcus_pneumoniae" title="Streptococcus pneumoniae">Streptococcus pneumoniae</a></i> bacteria, linked to <a href="/wiki/Influenza" title="Influenza">influenza</a>, or linked to <a href="/wiki/COVID-19" title="COVID-19">COVID-19</a>) are available.<sup id="cite_ref-NIH2011Pre_10-1" class="reference"><a href="#cite_note-NIH2011Pre-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup> Other methods of prevention include <a href="/wiki/Hand_washing" title="Hand washing">hand washing</a> to prevent infection, and not smoking.<sup id="cite_ref-NIH2011Pre_10-2" class="reference"><a href="#cite_note-NIH2011Pre-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup> </p><p>Treatment depends on the underlying cause.<sup id="cite_ref-NIH2011_20-0" class="reference"><a href="#cite_note-NIH2011-20"><span class="cite-bracket">&#91;</span>19<span class="cite-bracket">&#93;</span></a></sup> Pneumonia believed to be due to bacteria is treated with <a href="/wiki/Antibiotic" title="Antibiotic">antibiotics</a>.<sup id="cite_ref-NIH2011Tx_11-1" class="reference"><a href="#cite_note-NIH2011Tx-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> If the pneumonia is severe, the affected person is generally hospitalized.<sup id="cite_ref-NIH2011_20-1" class="reference"><a href="#cite_note-NIH2011-20"><span class="cite-bracket">&#91;</span>19<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Oxygen_therapy" title="Oxygen therapy">Oxygen therapy</a> may be used if oxygen levels are low.<sup id="cite_ref-NIH2011Tx_11-2" class="reference"><a href="#cite_note-NIH2011Tx-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> </p><p>Each year, pneumonia affects about 450&#160;million people globally (7% of the population) and results in about 4 million deaths.<sup id="cite_ref-Lancet11_12-3" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-CochraneTx13_13-2" class="reference"><a href="#cite_note-CochraneTx13-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> With the introduction of antibiotics and vaccines in the 20th century, survival has greatly improved.<sup id="cite_ref-Lancet11_12-4" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> Nevertheless, pneumonia remains a <a href="/wiki/List_of_causes_of_death_by_rate" title="List of causes of death by rate">leading cause of death</a> in developing countries, and also among the very old, the very young, and the <a href="/wiki/Chronic_(medicine)" class="mw-redirect" title="Chronic (medicine)">chronically</a> ill.<sup id="cite_ref-Lancet11_12-5" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">&#91;</span>20<span class="cite-bracket">&#93;</span></a></sup> Pneumonia often shortens the period of suffering among those already close to death and has thus been called "the old man's friend".<sup id="cite_ref-EBMED05_22-0" class="reference"><a href="#cite_note-EBMED05-22"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><span><video id="mwe_player_2" poster="//upload.wikimedia.org/wikipedia/commons/thumb/d/d5/En.Wikipedia-VideoWiki-Pneumonia.webm/310px-seek%3D20-En.Wikipedia-VideoWiki-Pneumonia.webm.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="310" height="174" data-durationhint="247" data-mwtitle="En.Wikipedia-VideoWiki-Pneumonia.webm" data-mwprovider="wikimediacommons" resource="/wiki/File:En.Wikipedia-VideoWiki-Pneumonia.webm"><source src="//upload.wikimedia.org/wikipedia/commons/d/d5/En.Wikipedia-VideoWiki-Pneumonia.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/d/d5/En.Wikipedia-VideoWiki-Pneumonia.webm/En.Wikipedia-VideoWiki-Pneumonia.webm.480p.vp9.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-transcodekey="480p.vp9.webm" data-width="854" data-height="480" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/d/d5/En.Wikipedia-VideoWiki-Pneumonia.webm/En.Wikipedia-VideoWiki-Pneumonia.webm.720p.vp9.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-transcodekey="720p.vp9.webm" data-width="1280" data-height="720" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/d/d5/En.Wikipedia-VideoWiki-Pneumonia.webm/En.Wikipedia-VideoWiki-Pneumonia.webm.144p.mjpeg.mov" type="video/quicktime" data-transcodekey="144p.mjpeg.mov" data-width="256" data-height="144" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/d/d5/En.Wikipedia-VideoWiki-Pneumonia.webm/En.Wikipedia-VideoWiki-Pneumonia.webm.240p.vp9.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-transcodekey="240p.vp9.webm" data-width="426" data-height="240" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/d/d5/En.Wikipedia-VideoWiki-Pneumonia.webm/En.Wikipedia-VideoWiki-Pneumonia.webm.360p.vp9.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-transcodekey="360p.vp9.webm" data-width="640" data-height="360" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/d/d5/En.Wikipedia-VideoWiki-Pneumonia.webm/En.Wikipedia-VideoWiki-Pneumonia.webm.360p.webm" type="video/webm; codecs=&quot;vp8, vorbis&quot;" data-transcodekey="360p.webm" data-width="640" data-height="360" /><track src="https://commons.wikimedia.org/w/api.php?action=timedtext&amp;title=File%3AEn.Wikipedia-VideoWiki-Pneumonia.webm&amp;lang=en&amp;trackformat=vtt&amp;origin=%2A" kind="subtitles" type="text/vtt" srclang="en" label="English ‪(en)‬" data-dir="ltr" /></video></span><figcaption>Video summary (<a href="/wiki/Wikipedia:VideoWiki/Pneumonia" title="Wikipedia:VideoWiki/Pneumonia">script</a>)</figcaption></figure> <style data-mw-deduplicate="TemplateStyles:r886046785">.mw-parser-output .toclimit-2 .toclevel-1 ul,.mw-parser-output .toclimit-3 .toclevel-2 ul,.mw-parser-output .toclimit-4 .toclevel-3 ul,.mw-parser-output .toclimit-5 .toclevel-4 ul,.mw-parser-output .toclimit-6 .toclevel-5 ul,.mw-parser-output .toclimit-7 .toclevel-6 ul{display:none}</style><div class="toclimit-3"><meta property="mw:PageProp/toc" /></div> <div class="mw-heading mw-heading2"><h2 id="Signs_and_symptoms">Signs and symptoms</h2></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Symptoms_of_pneumonia.svg" class="mw-file-description"><img alt="A diagram of the human body outlining the key symptoms of pneumonia" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/20/Symptoms_of_pneumonia.svg/290px-Symptoms_of_pneumonia.svg.png" decoding="async" width="290" height="287" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/20/Symptoms_of_pneumonia.svg/435px-Symptoms_of_pneumonia.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/20/Symptoms_of_pneumonia.svg/580px-Symptoms_of_pneumonia.svg.png 2x" data-file-width="1055" data-file-height="1045" /></a><figcaption>Main symptoms of infectious pneumonia</figcaption></figure> <p>People with infectious pneumonia often have a <a href="/wiki/Cough" title="Cough">productive cough</a>, fever accompanied by <a href="/wiki/Rigors" class="mw-redirect" title="Rigors">shaking chills</a>, <a href="/wiki/Shortness_of_breath" title="Shortness of breath">shortness of breath</a>, sharp or stabbing <a href="/wiki/Chest_pain" title="Chest pain">chest pain</a> during deep breaths, and an increased <a href="/wiki/Respiratory_rate" title="Respiratory rate">rate of breathing</a>.<sup id="cite_ref-BMJ06_9-1" class="reference"><a href="#cite_note-BMJ06-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> In elderly people, confusion may be the most prominent sign.<sup id="cite_ref-BMJ06_9-2" class="reference"><a href="#cite_note-BMJ06-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p><p>The typical signs and symptoms in children under five are fever, cough, and fast or difficult breathing.<sup id="cite_ref-Develop11_23-0" class="reference"><a href="#cite_note-Develop11-23"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> Fever is not very specific, as it occurs in many other common illnesses and may be absent in those with severe disease, <a href="/wiki/Malnutrition" title="Malnutrition">malnutrition</a> or in the elderly. In addition, a cough is frequently absent in children less than 2 months old.<sup id="cite_ref-Develop11_23-1" class="reference"><a href="#cite_note-Develop11-23"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> More severe signs and symptoms in children may include <a href="/wiki/Central_cyanosis" class="mw-redirect" title="Central cyanosis">blue-tinged skin</a>, unwillingness to drink, convulsions, ongoing vomiting, extremes of temperature, or a <a href="/wiki/Decreased_level_of_consciousness" class="mw-redirect" title="Decreased level of consciousness">decreased level of consciousness</a>.<sup id="cite_ref-Develop11_23-2" class="reference"><a href="#cite_note-Develop11-23"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Clinic2011_24-0" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> </p><p>Bacterial and viral cases of pneumonia usually result in similar symptoms.<sup id="cite_ref-WHOPrevent2012_25-0" class="reference"><a href="#cite_note-WHOPrevent2012-25"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> Some causes are associated with classic, but non-specific, clinical characteristics. Pneumonia caused by <i><a href="/wiki/Legionella" title="Legionella">Legionella</a></i> may occur with abdominal pain, <a href="/wiki/Diarrhea" title="Diarrhea">diarrhea</a>, or confusion.<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup> Pneumonia caused by <i><a href="/wiki/Streptococcus_pneumoniae" title="Streptococcus pneumoniae">Streptococcus pneumoniae</a></i> is associated with rusty colored sputum.<sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">&#91;</span>26<span class="cite-bracket">&#93;</span></a></sup> Pneumonia caused by <i><a href="/wiki/Klebsiella" title="Klebsiella">Klebsiella</a></i> may have bloody sputum often described as "currant jelly".<sup id="cite_ref-Tint10_28-0" class="reference"><a href="#cite_note-Tint10-28"><span class="cite-bracket">&#91;</span>27<span class="cite-bracket">&#93;</span></a></sup> Bloody sputum (known as <a href="/wiki/Hemoptysis" title="Hemoptysis">hemoptysis</a>) may also occur with <a href="/wiki/Tuberculosis" title="Tuberculosis">tuberculosis</a>, Gram-negative pneumonia, <a href="/wiki/Lung_abscess" title="Lung abscess">lung abscesses</a> and more commonly <a href="/wiki/Acute_bronchitis" title="Acute bronchitis">acute bronchitis</a>.<sup id="cite_ref-Clinic2011_24-1" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Pneumonia caused by <i><a href="/wiki/Mycoplasma_pneumoniae" title="Mycoplasma pneumoniae">Mycoplasma pneumoniae</a></i> may occur in association with <a href="/wiki/Cervical_lymphadenopathy" title="Cervical lymphadenopathy">swelling of the lymph nodes in the neck</a>, <a href="/wiki/Arthralgia" title="Arthralgia">joint pain</a>, or a <a href="/wiki/Otitis_media" title="Otitis media">middle ear infection</a>.<sup id="cite_ref-Clinic2011_24-2" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Viral pneumonia presents more commonly with <a href="/wiki/Wheezing" class="mw-redirect" title="Wheezing">wheezing</a> than bacterial pneumonia.<sup id="cite_ref-WHOPrevent2012_25-1" class="reference"><a href="#cite_note-WHOPrevent2012-25"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> Pneumonia was historically divided into "typical" and "atypical" based on the belief that the presentation predicted the underlying cause.<sup id="cite_ref-M32_29-0" class="reference"><a href="#cite_note-M32-29"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> However, evidence has not supported this distinction, therefore it is no longer emphasized.<sup id="cite_ref-M32_29-1" class="reference"><a href="#cite_note-M32-29"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> </p> <table class="wikitable" align="right" style="margin-left:0.4em;"> <tbody><tr> <th colspan="2">Symptoms frequency<sup id="cite_ref-Tint10_28-1" class="reference"><a href="#cite_note-Tint10-28"><span class="cite-bracket">&#91;</span>27<span class="cite-bracket">&#93;</span></a></sup> </th></tr> <tr> <th>Symptom</th> <th>Frequency </th></tr> <tr> <td>Cough</td> <td style="text-align: center;">79–91% </td></tr> <tr> <td>Fatigue</td> <td style="text-align: center;">90% </td></tr> <tr> <td>Fever</td> <td style="text-align: center;">71–75% </td></tr> <tr> <td>Shortness of breath</td> <td style="text-align: center;">67–75% </td></tr> <tr> <td>Sputum</td> <td style="text-align: center;">60–65% </td></tr> <tr> <td>Chest pain</td> <td style="text-align: center;">39–49% </td></tr> </tbody></table> <div class="mw-heading mw-heading2"><h2 id="Cause">Cause</h2></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Streptococcus_pneumoniae.jpg" class="mw-file-description"><img alt="Three lone round objects in a black background" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/20/Streptococcus_pneumoniae.jpg/220px-Streptococcus_pneumoniae.jpg" decoding="async" width="220" height="153" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/20/Streptococcus_pneumoniae.jpg/330px-Streptococcus_pneumoniae.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/20/Streptococcus_pneumoniae.jpg/440px-Streptococcus_pneumoniae.jpg 2x" data-file-width="700" data-file-height="488" /></a><figcaption>The bacterium <i><a href="/wiki/Streptococcus_pneumoniae" title="Streptococcus pneumoniae">Streptococcus pneumoniae</a></i>, a common cause of pneumonia, imaged by an <a href="/wiki/Electron_microscope" title="Electron microscope">electron microscope</a></figcaption></figure> <p>Pneumonia is due to infections caused primarily by bacteria or viruses and less commonly by fungi and <a href="/wiki/Parasites" class="mw-redirect" title="Parasites">parasites</a>. Although more than 100 strains of infectious agents have been identified, only a few are responsible for the majority of cases. Mixed infections with both viruses and bacteria may occur in roughly 45% of infections in children and 15% of infections in adults.<sup id="cite_ref-Lancet11_12-6" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> A causative agent may not be isolated in about half of cases despite careful testing.<sup id="cite_ref-EBMED05_22-1" class="reference"><a href="#cite_note-EBMED05-22"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> In an active population-based surveillance for community-acquired pneumonia requiring hospitalization in five hospitals in Chicago and Nashville from January 2010 through June 2012, 2259 patients were identified who had radiographic evidence of pneumonia and specimens that could be tested for the responsible pathogen.<sup id="cite_ref-EPIC2015_30-0" class="reference"><a href="#cite_note-EPIC2015-30"><span class="cite-bracket">&#91;</span>29<span class="cite-bracket">&#93;</span></a></sup> Most patients (62%) had no detectable pathogens in their sample, and unexpectedly, respiratory viruses were detected more frequently than bacteria.<sup id="cite_ref-EPIC2015_30-1" class="reference"><a href="#cite_note-EPIC2015-30"><span class="cite-bracket">&#91;</span>29<span class="cite-bracket">&#93;</span></a></sup> Specifically, 23% had one or more viruses, 11% had one or more bacteria, 3% had both bacterial and viral pathogens, and 1% had a fungal or mycobacterial infection. "The most common pathogens were <a href="/wiki/Human_rhinovirus" class="mw-redirect" title="Human rhinovirus">human rhinovirus</a> (in 9% of patients), influenza virus (in 6%), and <i>Streptococcus pneumoniae</i> (in 5%)."<sup id="cite_ref-EPIC2015_30-2" class="reference"><a href="#cite_note-EPIC2015-30"><span class="cite-bracket">&#91;</span>29<span class="cite-bracket">&#93;</span></a></sup> </p><p>The term <i>pneumonia</i> is sometimes more broadly applied to any condition resulting in <a href="/wiki/Inflammation" title="Inflammation">inflammation</a> of the lungs (caused for example by <a href="/wiki/Autoimmune_disease" title="Autoimmune disease">autoimmune diseases</a>, chemical burns or drug reactions); however, this inflammation is more accurately referred to as <a href="/wiki/Pneumonitis" title="Pneumonitis">pneumonitis</a>.<sup id="cite_ref-isbn0-7234-3200-7_16-1" class="reference"><a href="#cite_note-isbn0-7234-3200-7-16"><span class="cite-bracket">&#91;</span>16<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Bowden2010_17-1" class="reference"><a href="#cite_note-Bowden2010-17"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup> </p><p>Factors that predispose to pneumonia include smoking, <a href="/wiki/Immunodeficiency" title="Immunodeficiency">immunodeficiency</a>, alcoholism, <a href="/wiki/Chronic_obstructive_pulmonary_disease" title="Chronic obstructive pulmonary disease">chronic obstructive pulmonary disease</a>, <a href="/wiki/Sickle_cell_disease" title="Sickle cell disease">sickle cell disease</a> (SCD), <a href="/wiki/Asthma" title="Asthma">asthma</a>, <a href="/wiki/Chronic_kidney_disease" title="Chronic kidney disease">chronic kidney disease</a>, <a href="/wiki/Liver_disease" title="Liver disease">liver disease</a>, and <a href="/wiki/Biological_aging" class="mw-redirect" title="Biological aging">biological aging</a>.<sup id="cite_ref-Clinic2011_24-3" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">&#91;</span>30<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-CDC2020SCD_7-2" class="reference"><a href="#cite_note-CDC2020SCD-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup> Additional risks in children include not being <a href="/wiki/Breastfeeding" title="Breastfeeding">breastfed</a>, exposure to cigarette smoke and other air pollution, malnutrition, and poverty.<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">&#91;</span>31<span class="cite-bracket">&#93;</span></a></sup> The use of acid-suppressing medications – such as <a href="/wiki/Proton-pump_inhibitors" class="mw-redirect" title="Proton-pump inhibitors">proton-pump inhibitors</a> or <a href="/wiki/H2_blockers" class="mw-redirect" title="H2 blockers">H2 blockers</a> – is associated with an increased risk of pneumonia.<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">&#91;</span>32<span class="cite-bracket">&#93;</span></a></sup> Approximately 10% of people who require <a href="/wiki/Mechanical_ventilation" title="Mechanical ventilation">mechanical ventilation</a> develop <a href="/wiki/Ventilator-associated_pneumonia" title="Ventilator-associated pneumonia">ventilator-associated pneumonia</a>,<sup id="cite_ref-Ar2016_34-0" class="reference"><a href="#cite_note-Ar2016-34"><span class="cite-bracket">&#91;</span>33<span class="cite-bracket">&#93;</span></a></sup> and people with a <a href="/wiki/Gastric_feeding_tube" class="mw-redirect" title="Gastric feeding tube">gastric feeding tube</a> have an increased risk of developing <a href="/wiki/Aspiration_pneumonia" title="Aspiration pneumonia">aspiration pneumonia</a>.<sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">&#91;</span>34<span class="cite-bracket">&#93;</span></a></sup> Moreover, the misplacement of a feeding tube can lead to aspiration pneumonia. 28% of tube malposition results in pneumonia.<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">&#91;</span>35<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">&#91;</span>36<span class="cite-bracket">&#93;</span></a></sup> As with <a href="/wiki/Avanos_Medical" title="Avanos Medical">Avanos Medical</a>'s feeding tube placement system, the CORTRAK* 2 EAS, which was recalled in May 2022 by the <a href="/wiki/Food_and_Drug_Administration" title="Food and Drug Administration">FDA</a> due to adverse events reported, including pneumonia, caused a total of 60 injuries and 23 patient deaths, as communicated by the FDA.<sup id="cite_ref-38" class="reference"><a href="#cite_note-38"><span class="cite-bracket">&#91;</span>37<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">&#91;</span>38<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-40" class="reference"><a href="#cite_note-40"><span class="cite-bracket">&#91;</span>39<span class="cite-bracket">&#93;</span></a></sup> For people with certain variants of the <a href="/wiki/FER_(gene)" title="FER (gene)">FER gene</a>, the risk of death is reduced in <a href="/wiki/Sepsis" title="Sepsis">sepsis</a> caused by pneumonia. However, for those with <a href="/wiki/TLR6" class="mw-redirect" title="TLR6">TLR6</a> variants, the risk of getting <a href="/wiki/Legionnaires%27_disease" title="Legionnaires&#39; disease">Legionnaires' disease</a> is increased.<sup id="cite_ref-Elena_2015_41-0" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Bacteria">Bacteria</h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Bacterial_pneumonia" title="Bacterial pneumonia">Bacterial pneumonia</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:MRSAPneumoCT.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5d/MRSAPneumoCT.png/220px-MRSAPneumoCT.png" decoding="async" width="220" height="184" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5d/MRSAPneumoCT.png/330px-MRSAPneumoCT.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5d/MRSAPneumoCT.png/440px-MRSAPneumoCT.png 2x" data-file-width="879" data-file-height="734" /></a><figcaption>Cavitating pneumonia due to MRSA as seen on a CT scan</figcaption></figure> <p>Bacteria are the most common cause of <a href="/wiki/Community-acquired_pneumonia" title="Community-acquired pneumonia">community-acquired pneumonia</a> (CAP), with <i>Streptococcus pneumoniae</i> isolated in nearly 50% of cases.<sup id="cite_ref-Rad07_42-0" class="reference"><a href="#cite_note-Rad07-42"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-EOP10_43-0" class="reference"><a href="#cite_note-EOP10-43"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup> Other commonly isolated bacteria include <i><a href="/wiki/Haemophilus_influenzae" title="Haemophilus influenzae">Haemophilus influenzae</a></i> in 20%, <i><a href="/wiki/Chlamydophila_pneumoniae" class="mw-redirect" title="Chlamydophila pneumoniae">Chlamydophila pneumoniae</a></i> in 13%, and <i>Mycoplasma pneumoniae</i> in 3% of cases;<sup id="cite_ref-Rad07_42-1" class="reference"><a href="#cite_note-Rad07-42"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> <i><a href="/wiki/Staphylococcus_aureus" title="Staphylococcus aureus">Staphylococcus aureus</a></i>; <i><a href="/wiki/Moraxella_catarrhalis" title="Moraxella catarrhalis">Moraxella catarrhalis</a></i>; and <i><a href="/wiki/Legionella_pneumophila" title="Legionella pneumophila">Legionella pneumophila</a></i>.<sup id="cite_ref-EBMED05_22-2" class="reference"><a href="#cite_note-EBMED05-22"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> A number of <a href="/wiki/Drug_resistance" title="Drug resistance">drug-resistant</a> versions of the above infections are becoming more common, including drug-resistant <i>Streptococcus pneumoniae</i> (DRSP) and <a href="/wiki/Methicillin-resistant_Staphylococcus_aureus" title="Methicillin-resistant Staphylococcus aureus">methicillin-resistant <i>Staphylococcus aureus</i></a> (MRSA).<sup id="cite_ref-Clinic2011_24-4" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> </p><p>The spreading of organisms is facilitated by certain risk factors.<sup id="cite_ref-EBMED05_22-3" class="reference"><a href="#cite_note-EBMED05-22"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> Alcoholism is associated with <i>Streptococcus pneumoniae</i>, <a href="/wiki/Anaerobic_organism" title="Anaerobic organism">anaerobic organisms</a>, and <i>Mycobacterium tuberculosis</i>; smoking facilitates the effects of <i>Streptococcus pneumoniae</i>, <i>Haemophilus influenzae</i>, <i>Moraxella catarrhalis</i>, and <i>Legionella pneumophila</i>. Exposure to birds is associated with <i><a href="/wiki/Chlamydia_psittaci" title="Chlamydia psittaci">Chlamydia psittaci</a></i>; farm animals with <i><a href="/wiki/Coxiella_burnetti" class="mw-redirect" title="Coxiella burnetti">Coxiella burnetti</a></i>; aspiration of stomach contents with anaerobic organisms; and <a href="/wiki/Cystic_fibrosis" title="Cystic fibrosis">cystic fibrosis</a> with <i><a href="/wiki/Pseudomonas_aeruginosa" title="Pseudomonas aeruginosa">Pseudomonas aeruginosa</a></i> and <i>Staphylococcus aureus</i>.<sup id="cite_ref-EBMED05_22-4" class="reference"><a href="#cite_note-EBMED05-22"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> <i>Streptococcus pneumoniae</i> is more common in the winter,<sup id="cite_ref-EBMED05_22-5" class="reference"><a href="#cite_note-EBMED05-22"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> and it should be suspected in persons aspirating a large number of anaerobic organisms.<sup id="cite_ref-Clinic2011_24-5" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Viruses">Viruses</h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Viral_pneumonia" title="Viral pneumonia">Viral pneumonia</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:SARS_xray.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d2/SARS_xray.jpg/220px-SARS_xray.jpg" decoding="async" width="220" height="199" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d2/SARS_xray.jpg/330px-SARS_xray.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d2/SARS_xray.jpg/440px-SARS_xray.jpg 2x" data-file-width="600" data-file-height="543" /></a><figcaption>A chest x-ray of a patient with severe viral pneumonia due to <a href="/wiki/Severe_acute_respiratory_syndrome" class="mw-redirect" title="Severe acute respiratory syndrome">SARS</a></figcaption></figure> <p>In adults, viruses account for about one third of pneumonia cases,<sup id="cite_ref-Lancet11_12-7" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> and in children for about 15% of them.<sup id="cite_ref-M31_44-0" class="reference"><a href="#cite_note-M31-44"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> Commonly implicated agents include <a href="/wiki/Rhinovirus" title="Rhinovirus">rhinoviruses</a>, <a href="/wiki/Coronavirus" title="Coronavirus">coronaviruses</a>, <a href="/wiki/Influenza_virus" class="mw-redirect" title="Influenza virus">influenza virus</a>, <a href="/wiki/Respiratory_syncytial_virus" title="Respiratory syncytial virus">respiratory syncytial virus</a> (RSV), <a href="/wiki/Adenovirus" class="mw-redirect" title="Adenovirus">adenovirus</a>, and <a href="/wiki/Parainfluenza" class="mw-redirect" title="Parainfluenza">parainfluenza</a>.<sup id="cite_ref-Lancet11_12-8" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Viral09_45-0" class="reference"><a href="#cite_note-Viral09-45"><span class="cite-bracket">&#91;</span>44<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Herpes_simplex_virus" title="Herpes simplex virus">Herpes simplex virus</a> rarely causes pneumonia, except in groups such as newborns, persons with cancer, transplant recipients, and people with significant burns.<sup id="cite_ref-Text2010_46-0" class="reference"><a href="#cite_note-Text2010-46"><span class="cite-bracket">&#91;</span>45<span class="cite-bracket">&#93;</span></a></sup> After <a href="/wiki/Organ_transplantation" title="Organ transplantation">organ transplantation</a> or in otherwise <a href="/wiki/Immunocompromised" class="mw-redirect" title="Immunocompromised">immunocompromised</a> persons, there are high rates of <a href="/wiki/Cytomegalovirus" title="Cytomegalovirus">cytomegalovirus</a> pneumonia.<sup id="cite_ref-M31_44-1" class="reference"><a href="#cite_note-M31-44"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Text2010_46-1" class="reference"><a href="#cite_note-Text2010-46"><span class="cite-bracket">&#91;</span>45<span class="cite-bracket">&#93;</span></a></sup> Those with viral infections may be secondarily infected with the bacteria <i>Streptococcus pneumoniae</i>, <i>Staphylococcus aureus</i>, or <i>Haemophilus influenzae</i>, particularly when other health problems are present.<sup id="cite_ref-Clinic2011_24-6" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-M31_44-2" class="reference"><a href="#cite_note-M31-44"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> Different viruses predominate at different times of the year; during <a href="/wiki/Flu_season" title="Flu season">flu season</a>, for example, influenza may account for more than half of all viral cases.<sup id="cite_ref-M31_44-3" class="reference"><a href="#cite_note-M31-44"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> Outbreaks of other viruses also occur occasionally, including <a href="/wiki/Hantaviruses" class="mw-redirect" title="Hantaviruses">hantaviruses</a> and coronaviruses.<sup id="cite_ref-M31_44-4" class="reference"><a href="#cite_note-M31-44"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Severe_acute_respiratory_syndrome_coronavirus_2" class="mw-redirect" title="Severe acute respiratory syndrome coronavirus 2">Severe acute respiratory syndrome coronavirus 2</a> (SARS-CoV-2) can also result in pneumonia.<sup id="cite_ref-47" class="reference"><a href="#cite_note-47"><span class="cite-bracket">&#91;</span>46<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Fungi">Fungi</h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Fungal_pneumonia" title="Fungal pneumonia">Fungal pneumonia</a></div> <p>Fungal pneumonia is uncommon, but occurs more commonly in individuals with weakened immune systems due to AIDS, <a href="/wiki/Immunosuppressive_drug" title="Immunosuppressive drug">immunosuppressive drugs</a>, or other medical problems.<sup id="cite_ref-EBMED05_22-6" class="reference"><a href="#cite_note-EBMED05-22"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Fungus2009_48-0" class="reference"><a href="#cite_note-Fungus2009-48"><span class="cite-bracket">&#91;</span>47<span class="cite-bracket">&#93;</span></a></sup> It is most often caused by <i><a href="/wiki/Histoplasmosis" title="Histoplasmosis">Histoplasma capsulatum</a></i>, <i><a href="/wiki/Blastomyces" title="Blastomyces">Blastomyces</a></i>, <i><a href="/wiki/Cryptococcus_neoformans" title="Cryptococcus neoformans">Cryptococcus neoformans</a></i>, <i><a href="/wiki/Pneumocystis_jiroveci" class="mw-redirect" title="Pneumocystis jiroveci">Pneumocystis jiroveci</a></i> (<a href="/wiki/Pneumocystis_pneumonia" title="Pneumocystis pneumonia">pneumocystis pneumonia</a>, or PCP), and <i><a href="/wiki/Coccidioides_immitis" title="Coccidioides immitis">Coccidioides immitis</a></i>. Histoplasmosis is most common in the <a href="/wiki/Mississippi_embayment" title="Mississippi embayment">Mississippi River basin</a>, and <a href="/wiki/Coccidioidomycosis" title="Coccidioidomycosis">coccidioidomycosis</a> is most common in the Southwestern United States.<sup id="cite_ref-EBMED05_22-7" class="reference"><a href="#cite_note-EBMED05-22"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> The number of cases of fungal pneumonia has been increasing in the latter half of the 20th century due to increasing travel and rates of immunosuppression in the population.<sup id="cite_ref-Fungus2009_48-1" class="reference"><a href="#cite_note-Fungus2009-48"><span class="cite-bracket">&#91;</span>47<span class="cite-bracket">&#93;</span></a></sup> For people infected with <a href="/wiki/HIV/AIDS" title="HIV/AIDS">HIV/AIDS</a>, PCP is a common <a href="/wiki/Opportunistic_infection" title="Opportunistic infection">opportunistic infection</a>.<sup id="cite_ref-Ewa2015_49-0" class="reference"><a href="#cite_note-Ewa2015-49"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Parasites">Parasites</h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Parasitic_pneumonia" title="Parasitic pneumonia">Parasitic pneumonia</a></div> <p>A variety of <a href="/wiki/Parasite" class="mw-redirect" title="Parasite">parasites</a> can affect the lungs, including <i><a href="/wiki/Toxoplasma_gondii" title="Toxoplasma gondii">Toxoplasma gondii</a></i>, <i><a href="/wiki/Strongyloides_stercoralis" title="Strongyloides stercoralis">Strongyloides stercoralis</a></i>, <i><a href="/wiki/Ascaris_lumbricoides" title="Ascaris lumbricoides">Ascaris lumbricoides</a></i>, and <i><a href="/wiki/Plasmodium_malariae" title="Plasmodium malariae">Plasmodium malariae</a></i>.<sup id="cite_ref-M37_50-0" class="reference"><a href="#cite_note-M37-50"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup> These organisms typically enter the body through direct contact with the skin, ingestion, or via an insect vector.<sup id="cite_ref-M37_50-1" class="reference"><a href="#cite_note-M37-50"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup> Except for <i><a href="/wiki/Paragonimus_westermani" title="Paragonimus westermani">Paragonimus westermani</a></i>, most parasites do not specifically affect the lungs but involve the lungs secondarily to other sites.<sup id="cite_ref-M37_50-2" class="reference"><a href="#cite_note-M37-50"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup> Some parasites, in particular those belonging to the <i>Ascaris</i> and <i>Strongyloides</i> genera, stimulate a strong <a href="/wiki/Eosinophilic" title="Eosinophilic">eosinophilic</a> reaction, which may result in <a href="/wiki/Eosinophilic_pneumonia" title="Eosinophilic pneumonia">eosinophilic pneumonia</a>.<sup id="cite_ref-M37_50-3" class="reference"><a href="#cite_note-M37-50"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup> In other infections, such as malaria, lung involvement is due primarily to <a href="/wiki/Cytokine" title="Cytokine">cytokine</a>-induced <a href="/wiki/Systemic_inflammation" title="Systemic inflammation">systemic inflammation</a>.<sup id="cite_ref-M37_50-4" class="reference"><a href="#cite_note-M37-50"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup> In the <a href="/wiki/Developed_world" class="mw-redirect" title="Developed world">developed world</a>, these infections are most common in people returning from travel or in immigrants.<sup id="cite_ref-M37_50-5" class="reference"><a href="#cite_note-M37-50"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup> Around the world, parasitic pneumonia is most common in the immunodeficient.<sup id="cite_ref-51" class="reference"><a href="#cite_note-51"><span class="cite-bracket">&#91;</span>50<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Noninfectious">Noninfectious</h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Idiopathic_interstitial_pneumonia" title="Idiopathic interstitial pneumonia">Idiopathic interstitial pneumonia</a></div> <p>Idiopathic interstitial pneumonia or noninfectious pneumonia<sup id="cite_ref-52" class="reference"><a href="#cite_note-52"><span class="cite-bracket">&#91;</span>51<span class="cite-bracket">&#93;</span></a></sup> is a class of <a href="/wiki/Diffuse_lung_disease" class="mw-redirect" title="Diffuse lung disease">diffuse lung diseases</a>. They include <a href="/wiki/Diffuse_alveolar_damage" title="Diffuse alveolar damage">diffuse alveolar damage</a>, <a href="/wiki/Organizing_pneumonia" class="mw-redirect" title="Organizing pneumonia">organizing pneumonia</a>, <a href="/wiki/Nonspecific_interstitial_pneumonia" class="mw-redirect" title="Nonspecific interstitial pneumonia">nonspecific interstitial pneumonia</a>, <a href="/wiki/Lymphocytic_interstitial_pneumonia" title="Lymphocytic interstitial pneumonia">lymphocytic interstitial pneumonia</a>, <a href="/wiki/Desquamative_interstitial_pneumonia" title="Desquamative interstitial pneumonia">desquamative interstitial pneumonia</a>, <a href="/wiki/Respiratory_bronchiolitis_interstitial_lung_disease" class="mw-redirect" title="Respiratory bronchiolitis interstitial lung disease">respiratory bronchiolitis interstitial lung disease</a>, and <a href="/wiki/Usual_interstitial_pneumonia" title="Usual interstitial pneumonia">usual interstitial pneumonia</a>.<sup id="cite_ref-53" class="reference"><a href="#cite_note-53"><span class="cite-bracket">&#91;</span>52<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Lipoid_pneumonia" class="mw-redirect" title="Lipoid pneumonia">Lipoid pneumonia</a> is another rare cause due to <a href="/wiki/Lipids" class="mw-redirect" title="Lipids">lipids</a> entering the lung.<sup id="cite_ref-Had2010_54-0" class="reference"><a href="#cite_note-Had2010-54"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup> These lipids can either be inhaled or spread to the lungs from elsewhere in the body.<sup id="cite_ref-Had2010_54-1" class="reference"><a href="#cite_note-Had2010-54"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Mechanisms">Mechanisms</h2></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:New_Pneumonia_cartoon.jpg" class="mw-file-description"><img alt="A schematic diagram of the human lungs with an empty circle on the left representing a normal alveolus and one on the right showing an alveolus full of fluid as in pneumonia" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fb/New_Pneumonia_cartoon.jpg/290px-New_Pneumonia_cartoon.jpg" decoding="async" width="290" height="354" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fb/New_Pneumonia_cartoon.jpg/435px-New_Pneumonia_cartoon.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/f/fb/New_Pneumonia_cartoon.jpg 2x" data-file-width="500" data-file-height="611" /></a><figcaption>Pneumonia fills the lung's <a href="/wiki/Pulmonary_alveolus" title="Pulmonary alveolus">alveoli</a> with fluid, hindering oxygenation. The alveolus on the left is normal, whereas the one on the right is full of fluid from pneumonia.</figcaption></figure> <p>Pneumonia frequently starts as an <a href="/wiki/Upper_respiratory_tract_infection" title="Upper respiratory tract infection">upper respiratory tract infection</a> that moves into the lower respiratory tract.<sup id="cite_ref-PedNA09_55-0" class="reference"><a href="#cite_note-PedNA09-55"><span class="cite-bracket">&#91;</span>54<span class="cite-bracket">&#93;</span></a></sup> It is a type of pneumonitis (lung inflammation).<sup id="cite_ref-56" class="reference"><a href="#cite_note-56"><span class="cite-bracket">&#91;</span>55<span class="cite-bracket">&#93;</span></a></sup> The normal flora of the upper airway give protection by competing with pathogens for nutrients. In the lower airways, <a href="/wiki/Cough_reflex" title="Cough reflex">reflexes of the glottis</a>, actions of <a href="/wiki/Complement_protein" class="mw-redirect" title="Complement protein">complement proteins</a> and <a href="/wiki/Immunoglobulin" class="mw-redirect" title="Immunoglobulin">immunoglobulins</a> are important for protection. Micro<a href="/wiki/Pulmonary_aspiration" title="Pulmonary aspiration">aspiration</a> of contaminated secretions can infect the lower airways and cause pneumonia. The progress of pneumonia is determined by the virulence of the organism; the amount of organism required to start an infection; and the body's immune response against the infection.<sup id="cite_ref-Elena_2015_41-1" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Bacterial">Bacterial</h3></div> <p>Most bacteria enter the lungs via small aspirations of organisms residing in the throat or nose.<sup id="cite_ref-Clinic2011_24-7" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Half of normal people have these small aspirations during sleep.<sup id="cite_ref-M32_29-2" class="reference"><a href="#cite_note-M32-29"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> While the throat always contains bacteria, <a href="/wiki/Virulent" class="mw-redirect" title="Virulent">potentially infectious</a> ones reside there only at certain times and under certain conditions.<sup id="cite_ref-M32_29-3" class="reference"><a href="#cite_note-M32-29"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> A minority of types of bacteria such as <i><a href="/wiki/Mycobacterium_tuberculosis" title="Mycobacterium tuberculosis">Mycobacterium tuberculosis</a></i> and <i>Legionella pneumophila</i> reach the lungs via contaminated airborne droplets.<sup id="cite_ref-Clinic2011_24-8" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Bacteria can also spread via the blood.<sup id="cite_ref-WHOPrevent2012_25-2" class="reference"><a href="#cite_note-WHOPrevent2012-25"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> Once in the lungs, bacteria may invade the spaces between cells and between alveoli, where the <a href="/wiki/Macrophage" title="Macrophage">macrophages</a> and <a href="/wiki/Neutrophil" title="Neutrophil">neutrophils</a> (defensive <a href="/wiki/White_blood_cell" title="White blood cell">white blood cells</a>) attempt to inactivate the bacteria.<sup id="cite_ref-57" class="reference"><a href="#cite_note-57"><span class="cite-bracket">&#91;</span>56<span class="cite-bracket">&#93;</span></a></sup> The neutrophils also release cytokines, causing a general activation of the immune system.<sup id="cite_ref-Fein2006_58-0" class="reference"><a href="#cite_note-Fein2006-58"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup> This leads to the fever, chills, and fatigue common in bacterial pneumonia.<sup id="cite_ref-Fein2006_58-1" class="reference"><a href="#cite_note-Fein2006-58"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup> The neutrophils, bacteria, and fluid from surrounding blood vessels fill the alveoli, resulting in the consolidation seen on chest X-ray.<sup id="cite_ref-59" class="reference"><a href="#cite_note-59"><span class="cite-bracket">&#91;</span>58<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Viral">Viral</h3></div> <p>Viruses may reach the lung by a number of different routes. Respiratory syncytial virus is typically contracted when people touch contaminated objects and then touch their eyes or nose.<sup id="cite_ref-M31_44-5" class="reference"><a href="#cite_note-M31-44"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> Other viral infections occur when contaminated airborne droplets are inhaled through the nose or mouth.<sup id="cite_ref-Clinic2011_24-9" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Once in the upper airway, the viruses may make their way into the lungs, where they invade the cells lining the airways, alveoli, or <a href="/wiki/Lung_parenchyma" class="mw-redirect" title="Lung parenchyma">lung parenchyma</a>.<sup id="cite_ref-M31_44-6" class="reference"><a href="#cite_note-M31-44"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> Some viruses such as measles and herpes simplex may reach the lungs via the blood.<sup id="cite_ref-Gary2010_60-0" class="reference"><a href="#cite_note-Gary2010-60"><span class="cite-bracket">&#91;</span>59<span class="cite-bracket">&#93;</span></a></sup> The invasion of the lungs may lead to varying degrees of cell death.<sup id="cite_ref-M31_44-7" class="reference"><a href="#cite_note-M31-44"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> When the immune system responds to the infection, even more lung damage may occur.<sup id="cite_ref-M31_44-8" class="reference"><a href="#cite_note-M31-44"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> Primarily white blood cells, mainly <a href="/wiki/Mononuclear_cell" class="mw-redirect" title="Mononuclear cell">mononuclear cells</a>, generate the inflammation.<sup id="cite_ref-Gary2010_60-1" class="reference"><a href="#cite_note-Gary2010-60"><span class="cite-bracket">&#91;</span>59<span class="cite-bracket">&#93;</span></a></sup> As well as damaging the lungs, many viruses simultaneously affect other <a href="/wiki/Organ_(anatomy)" class="mw-redirect" title="Organ (anatomy)">organs</a> and thus disrupt other body functions. Viruses also make the body more susceptible to bacterial infections; in this way, bacterial pneumonia can occur at the same time as viral pneumonia.<sup id="cite_ref-Viral09_45-1" class="reference"><a href="#cite_note-Viral09-45"><span class="cite-bracket">&#91;</span>44<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Diagnosis">Diagnosis</h2></div> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><style data-mw-deduplicate="TemplateStyles:r1096940132">.mw-parser-output .listen .side-box-text{line-height:1.1em}.mw-parser-output .listen-plain{border:none;background:transparent}.mw-parser-output .listen-embedded{width:100%;margin:0;border-width:1px 0 0 0;background:transparent}.mw-parser-output .listen-header{padding:2px}.mw-parser-output .listen-embedded .listen-header{padding:2px 0}.mw-parser-output .listen-file-header{padding:4px 0}.mw-parser-output .listen .description{padding-top:2px}.mw-parser-output .listen .mw-tmh-player{max-width:100%}@media(max-width:719px){.mw-parser-output .listen{clear:both}}@media(min-width:720px){.mw-parser-output .listen:not(.listen-noimage){width:320px}.mw-parser-output .listen-left{overflow:visible;float:left}.mw-parser-output .listen-center{float:none;margin-left:auto;margin-right:auto}}</style><div class="side-box side-box-right listen noprint"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"> <div class="side-box-flex"> <div class="side-box-image"><figure class="mw-halign-center" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/87/Gnome-mime-sound-openclipart.svg/50px-Gnome-mime-sound-openclipart.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/87/Gnome-mime-sound-openclipart.svg/75px-Gnome-mime-sound-openclipart.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/87/Gnome-mime-sound-openclipart.svg/100px-Gnome-mime-sound-openclipart.svg.png 2x" data-file-width="160" data-file-height="160" /></span><figcaption></figcaption></figure></div> <div class="side-box-text plainlist"><div class="haudio"> <div class="listen-file-header"><a href="/wiki/File:Crackles_pneumoniaO.ogg" title="File:Crackles pneumoniaO.ogg">Crackles</a></div> <div><span typeof="mw:File"><span><audio id="mwe_player_3" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="232" style="width:232px;" data-durationhint="14" data-mwtitle="Crackles_pneumoniaO.ogg" data-mwprovider="wikimediacommons"><source src="//upload.wikimedia.org/wikipedia/commons/c/c7/Crackles_pneumoniaO.ogg" type="audio/ogg; codecs=&quot;vorbis&quot;" data-width="0" data-height="0" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/c/c7/Crackles_pneumoniaO.ogg/Crackles_pneumoniaO.ogg.mp3" type="audio/mpeg" data-transcodekey="mp3" data-width="0" data-height="0" /><track src="https://commons.wikimedia.org/w/api.php?action=timedtext&amp;title=File%3ACrackles_pneumoniaO.ogg&amp;lang=en&amp;trackformat=vtt&amp;origin=%2A" kind="subtitles" type="text/vtt" srclang="en" label="English ‪(en)‬" data-dir="ltr" /></audio></span></span></div> <div class="description">Crackles heard in the lungs of a person with pneumonia using a stethoscope.</div></div></div></div> <div class="side-box-abovebelow"><hr /><i class="selfreference">Problems playing this file? See <a href="/wiki/Help:Media" title="Help:Media">media help</a>.</i></div> </div> <p>Pneumonia is typically diagnosed based on a combination of physical signs and often a <a href="/wiki/Chest_X-ray" class="mw-redirect" title="Chest X-ray">chest X-ray</a>.<sup id="cite_ref-Diag10_61-0" class="reference"><a href="#cite_note-Diag10-61"><span class="cite-bracket">&#91;</span>60<span class="cite-bracket">&#93;</span></a></sup> In adults with normal vital signs and a normal lung examination, the diagnosis is unlikely.<sup id="cite_ref-62" class="reference"><a href="#cite_note-62"><span class="cite-bracket">&#91;</span>61<span class="cite-bracket">&#93;</span></a></sup> However, the underlying cause can be difficult to confirm, as there is no definitive test able to distinguish between bacterial and non-bacterial cause.<sup id="cite_ref-Lancet11_12-9" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Diag10_61-1" class="reference"><a href="#cite_note-Diag10-61"><span class="cite-bracket">&#91;</span>60<span class="cite-bracket">&#93;</span></a></sup> The overall impression of a physician appears to be at least as good as decision rules for making or excluding the diagnosis.<sup id="cite_ref-63" class="reference"><a href="#cite_note-63"><span class="cite-bracket">&#91;</span>62<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Diagnosis_in_children">Diagnosis in children</h3></div> <p>The <a href="/wiki/World_Health_Organization" title="World Health Organization">World Health Organization</a> has defined pneumonia in children clinically based on either a cough or difficulty breathing and a rapid respiratory rate, chest indrawing, or a decreased level of consciousness.<sup id="cite_ref-WHOBook_64-0" class="reference"><a href="#cite_note-WHOBook-64"><span class="cite-bracket">&#91;</span>63<span class="cite-bracket">&#93;</span></a></sup> A rapid respiratory rate is defined as greater than 60 breaths per minute in children under 2 months old, greater than 50 breaths per minute in children 2 months to 1 year old, or greater than 40 breaths per minute in children 1 to 5 years old.<sup id="cite_ref-WHOBook_64-1" class="reference"><a href="#cite_note-WHOBook-64"><span class="cite-bracket">&#91;</span>63<span class="cite-bracket">&#93;</span></a></sup> </p><p>In children, low oxygen levels and lower chest indrawing are more <a href="/wiki/Sensitivity_and_specificity" title="Sensitivity and specificity">sensitive</a> than hearing chest <a href="/wiki/Crackles" title="Crackles">crackles</a> with a <a href="/wiki/Stethoscope" title="Stethoscope">stethoscope</a> or increased respiratory rate.<sup id="cite_ref-65" class="reference"><a href="#cite_note-65"><span class="cite-bracket">&#91;</span>64<span class="cite-bracket">&#93;</span></a></sup> Grunting and nasal flaring may be other useful signs in children less than five years old.<sup id="cite_ref-66" class="reference"><a href="#cite_note-66"><span class="cite-bracket">&#91;</span>65<span class="cite-bracket">&#93;</span></a></sup> </p><p>Lack of wheezing is an indicator of <i>Mycoplasma pneumoniae</i> in children with pneumonia, but as an indicator it is not accurate enough to decide whether or not <a href="/wiki/Macrolide" title="Macrolide">macrolide</a> treatment should be used.<sup id="cite_ref-Wang2012_67-0" class="reference"><a href="#cite_note-Wang2012-67"><span class="cite-bracket">&#91;</span>66<span class="cite-bracket">&#93;</span></a></sup> The presence of chest pain in children with pneumonia doubles the probability of <i>Mycoplasma pneumoniae</i>.<sup id="cite_ref-Wang2012_67-1" class="reference"><a href="#cite_note-Wang2012-67"><span class="cite-bracket">&#91;</span>66<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Diagnosis_in_adults">Diagnosis in adults</h3></div> <p>In general, in adults, investigations are not needed in mild cases.<sup id="cite_ref-BTS09_68-0" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> There is a very low risk of pneumonia if all <a href="/wiki/Vital_sign" class="mw-redirect" title="Vital sign">vital signs</a> and <a href="/wiki/Chest_auscultation" class="mw-redirect" title="Chest auscultation">auscultation</a> are normal.<sup id="cite_ref-69" class="reference"><a href="#cite_note-69"><span class="cite-bracket">&#91;</span>68<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/C-reactive_protein" title="C-reactive protein">C-reactive protein</a> (CRP) may help support the diagnosis.<sup id="cite_ref-70" class="reference"><a href="#cite_note-70"><span class="cite-bracket">&#91;</span>69<span class="cite-bracket">&#93;</span></a></sup> For those with CRP less than 20&#160;mg/L without convincing evidence of pneumonia, antibiotics are not recommended.<sup id="cite_ref-Elena_2015_41-2" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> </p><p><a href="/wiki/Procalcitonin" title="Procalcitonin">Procalcitonin</a> may help determine the cause and support decisions about who should receive antibiotics.<sup id="cite_ref-pmid29037960_71-0" class="reference"><a href="#cite_note-pmid29037960-71"><span class="cite-bracket">&#91;</span>70<span class="cite-bracket">&#93;</span></a></sup> Antibiotics are encouraged if the procalcitonin level reaches 0.25 μg/L, strongly encouraged if it reaches 0.5 μg/L, and strongly discouraged if the level is below 0.10 μg/L.<sup id="cite_ref-Elena_2015_41-3" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> In people requiring hospitalization, <a href="/wiki/Pulse_oximetry" title="Pulse oximetry">pulse oximetry</a>, <a href="/wiki/Chest_radiography" class="mw-redirect" title="Chest radiography">chest radiography</a> and <a href="/wiki/Blood_test" title="Blood test">blood tests</a> – including a <a href="/wiki/Complete_blood_count" title="Complete blood count">complete blood count</a>, <a href="/wiki/Serum_electrolytes" class="mw-redirect" title="Serum electrolytes">serum electrolytes</a>, C-reactive protein level, and possibly <a href="/wiki/Liver_function_tests" title="Liver function tests">liver function tests</a> – are recommended.<sup id="cite_ref-BTS09_68-1" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> </p><p>The diagnosis of <a href="/wiki/Influenza-like_illness" title="Influenza-like illness">influenza-like illness</a> can be made based on the signs and symptoms; however, confirmation of an influenza infection requires testing.<sup id="cite_ref-ILI05_72-0" class="reference"><a href="#cite_note-ILI05-72"><span class="cite-bracket">&#91;</span>71<span class="cite-bracket">&#93;</span></a></sup> Thus, treatment is frequently based on the presence of influenza in the community or a <a href="/wiki/Rapid_influenza_diagnostic_test" title="Rapid influenza diagnostic test">rapid influenza test</a>.<sup id="cite_ref-ILI05_72-1" class="reference"><a href="#cite_note-ILI05-72"><span class="cite-bracket">&#91;</span>71<span class="cite-bracket">&#93;</span></a></sup> </p><p>Adults 65 years old or older, as well as cigarette smokers and people with ongoing medical conditions are at increased risk for pneumonia.<sup id="cite_ref-73" class="reference"><a href="#cite_note-73"><span class="cite-bracket">&#91;</span>72<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Physical_exam">Physical exam</h3></div> <p><a href="/wiki/Physical_examination" title="Physical examination">Physical examination</a> may sometimes reveal <a href="/wiki/Hypotension" title="Hypotension">low blood pressure</a>, <a href="/wiki/Tachycardia" title="Tachycardia">high heart rate</a>, or low <a href="/wiki/Oxygenation_(medical)" class="mw-redirect" title="Oxygenation (medical)">oxygen saturation</a>.<sup id="cite_ref-Clinic2011_24-10" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> The respiratory rate may be faster than normal, and this may occur a day or two before other signs.<sup id="cite_ref-Clinic2011_24-11" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-M32_29-4" class="reference"><a href="#cite_note-M32-29"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> Examination of the chest may be normal, but it may show decreased expansion on the affected side. Harsh breath sounds from the larger airways that are transmitted through the inflamed lung are termed <a href="/wiki/Bronchus" title="Bronchus">bronchial</a> breathing and are heard on auscultation with a stethoscope.<sup id="cite_ref-Clinic2011_24-12" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Crackles (rales) may be heard over the affected area during <a href="/wiki/Inhalation" title="Inhalation">inspiration</a>.<sup id="cite_ref-Clinic2011_24-13" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Percussion_(medicine)" title="Percussion (medicine)">Percussion</a> may be dulled over the affected lung, and increased, rather than decreased, <a href="/wiki/Vocal_resonation" title="Vocal resonation">vocal resonance</a> distinguishes pneumonia from a <a href="/wiki/Pleural_effusion" title="Pleural effusion">pleural effusion</a>.<sup id="cite_ref-BMJ06_9-3" class="reference"><a href="#cite_note-BMJ06-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Imaging">Imaging</h3></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:X-ray_of_lobar_pneumonia.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/51/X-ray_of_lobar_pneumonia.jpg/220px-X-ray_of_lobar_pneumonia.jpg" decoding="async" width="220" height="175" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/51/X-ray_of_lobar_pneumonia.jpg/330px-X-ray_of_lobar_pneumonia.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/51/X-ray_of_lobar_pneumonia.jpg/440px-X-ray_of_lobar_pneumonia.jpg 2x" data-file-width="3027" data-file-height="2407" /></a><figcaption>A chest X-ray showing a very prominent wedge-shaped area of airspace consolidation in the right lung characteristic of acute bacterial lobar pneumonia</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:CT_scan_of_the_chest,_demonstrating_right-sided_pneumonia.jpg" class="mw-file-description"><img alt="A black-and-white image shows the internal organs in cross-section as generated by CT. Where one would expect black on the left, one sees a whiter area with black sticks through it." src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7a/CT_scan_of_the_chest%2C_demonstrating_right-sided_pneumonia.jpg/220px-CT_scan_of_the_chest%2C_demonstrating_right-sided_pneumonia.jpg" decoding="async" width="220" height="157" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7a/CT_scan_of_the_chest%2C_demonstrating_right-sided_pneumonia.jpg/330px-CT_scan_of_the_chest%2C_demonstrating_right-sided_pneumonia.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7a/CT_scan_of_the_chest%2C_demonstrating_right-sided_pneumonia.jpg/440px-CT_scan_of_the_chest%2C_demonstrating_right-sided_pneumonia.jpg 2x" data-file-width="3006" data-file-height="2140" /></a><figcaption>CT of the chest demonstrating right-sided pneumonia (left side of the image)</figcaption></figure> <p>A <a href="/wiki/Chest_radiograph" title="Chest radiograph">chest radiograph</a> is frequently used in diagnosis.<sup id="cite_ref-Develop11_23-3" class="reference"><a href="#cite_note-Develop11-23"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> In people with mild disease, imaging is needed only in those with potential complications, those not having improved with treatment, or those in which the cause is uncertain.<sup id="cite_ref-Develop11_23-4" class="reference"><a href="#cite_note-Develop11-23"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-BTS09_68-2" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> If a person is sufficiently sick to require hospitalization, a chest radiograph is recommended.<sup id="cite_ref-BTS09_68-3" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> Findings do not always match the severity of disease and do not reliably separate between bacterial and viral infection.<sup id="cite_ref-Develop11_23-5" class="reference"><a href="#cite_note-Develop11-23"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> </p><p>X-ray presentations of pneumonia may be classified as <a href="/wiki/Lobar_pneumonia" title="Lobar pneumonia">lobar pneumonia</a>, <a href="/wiki/Bronchopneumonia" title="Bronchopneumonia">bronchopneumonia</a>, <a href="/wiki/Lobular_pneumonia" class="mw-redirect" title="Lobular pneumonia">lobular pneumonia</a>, and <a href="/wiki/Interstitial_pneumonia" class="mw-redirect" title="Interstitial pneumonia">interstitial pneumonia</a>.<sup id="cite_ref-74" class="reference"><a href="#cite_note-74"><span class="cite-bracket">&#91;</span>73<span class="cite-bracket">&#93;</span></a></sup> Bacterial, community-acquired pneumonia classically show <a href="/wiki/Lung_consolidation" class="mw-redirect" title="Lung consolidation">lung consolidation</a> of one <a href="/wiki/Bronchopulmonary_segment" title="Bronchopulmonary segment">lung segmental lobe</a>, which is known as lobar pneumonia.<sup id="cite_ref-Rad07_42-2" class="reference"><a href="#cite_note-Rad07-42"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> However, findings may vary, and other patterns are common in other types of pneumonia.<sup id="cite_ref-Rad07_42-3" class="reference"><a href="#cite_note-Rad07-42"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> Aspiration pneumonia may present with bilateral opacities primarily in the bases of the lungs and on the right side.<sup id="cite_ref-Rad07_42-4" class="reference"><a href="#cite_note-Rad07-42"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> Radiographs of viral pneumonia may appear normal, appear hyper-inflated, have bilateral patchy areas, or present similar to bacterial pneumonia with lobar consolidation.<sup id="cite_ref-Rad07_42-5" class="reference"><a href="#cite_note-Rad07-42"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> Radiologic findings may not be present in the early stages of the disease, especially in the presence of dehydration, or may be difficult to interpret in the <a href="/wiki/Obesity" title="Obesity">obese</a> or those with a history of lung disease.<sup id="cite_ref-Clinic2011_24-14" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Complications such as pleural effusion may also be found on chest radiographs. Laterolateral chest radiographs can increase the diagnostic accuracy of lung consolidation and pleural effusion.<sup id="cite_ref-Elena_2015_41-4" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> </p><p>A <a href="/wiki/CT_scan" title="CT scan">CT scan</a> can give additional information in indeterminate cases<sup id="cite_ref-Rad07_42-6" class="reference"><a href="#cite_note-Rad07-42"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> and provide more details in those with an unclear chest radiograph (for example occult pneumonia in chronic obstructive pulmonary disease). They can be used to exclude <a href="/wiki/Pulmonary_embolism" title="Pulmonary embolism">pulmonary embolism</a> and <a href="/wiki/Fungal_pneumonia" title="Fungal pneumonia">fungal pneumonia</a>, and detect lung abscesses in those who are not responding to treatments.<sup id="cite_ref-Elena_2015_41-5" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> However, CT scans are more expensive, have a higher dose of radiation, and cannot be done at bedside.<sup id="cite_ref-Elena_2015_41-6" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> </p><p><a href="/wiki/Lung_ultrasound" class="mw-redirect" title="Lung ultrasound">Lung ultrasound</a> may also be useful in helping to make the diagnosis.<sup id="cite_ref-75" class="reference"><a href="#cite_note-75"><span class="cite-bracket">&#91;</span>74<span class="cite-bracket">&#93;</span></a></sup> Ultrasound is radiation free and can be done at bedside. However, ultrasound requires specific skills to operate the machine and interpret the findings.<sup id="cite_ref-Elena_2015_41-7" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> It may be more accurate than chest X-ray.<sup id="cite_ref-76" class="reference"><a href="#cite_note-76"><span class="cite-bracket">&#91;</span>75<span class="cite-bracket">&#93;</span></a></sup> </p> <ul class="gallery mw-gallery-traditional"> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><span><video id="mwe_player_0" poster="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/UOTW_34_-_Ultrasound_of_the_Week_1.webm/120px--UOTW_34_-_Ultrasound_of_the_Week_1.webm.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="120" height="71" data-durationhint="11" data-mwtitle="UOTW_34_-_Ultrasound_of_the_Week_1.webm" data-mwprovider="wikimediacommons"><source src="//upload.wikimedia.org/wikipedia/commons/f/fa/UOTW_34_-_Ultrasound_of_the_Week_1.webm" type="video/webm; codecs=&quot;vp8&quot;" data-width="792" data-height="470" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/fa/UOTW_34_-_Ultrasound_of_the_Week_1.webm/UOTW_34_-_Ultrasound_of_the_Week_1.webm.240p.vp9.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-transcodekey="240p.vp9.webm" data-width="404" data-height="240" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/fa/UOTW_34_-_Ultrasound_of_the_Week_1.webm/UOTW_34_-_Ultrasound_of_the_Week_1.webm.360p.vp9.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-transcodekey="360p.vp9.webm" data-width="606" data-height="360" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/f/fa/UOTW_34_-_Ultrasound_of_the_Week_1.webm/UOTW_34_-_Ultrasound_of_the_Week_1.webm.360p.webm" type="video/webm; codecs=&quot;vp8, vorbis&quot;" data-transcodekey="360p.webm" data-width="606" data-height="360" /></video></span></span></div> <div class="gallerytext">Pneumonia seen by ultrasound<sup id="cite_ref-UOTW34_77-0" class="reference"><a href="#cite_note-UOTW34-77"><span class="cite-bracket">&#91;</span>76<span class="cite-bracket">&#93;</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><span><video id="mwe_player_1" poster="//upload.wikimedia.org/wikipedia/commons/thumb/d/de/UOTW_34_-_Ultrasound_of_the_Week_2.webm/120px--UOTW_34_-_Ultrasound_of_the_Week_2.webm.jpg" controls="" preload="none" data-mw-tmh="" class="mw-file-element" width="120" height="71" data-durationhint="7" data-mwtitle="UOTW_34_-_Ultrasound_of_the_Week_2.webm" data-mwprovider="wikimediacommons"><source src="//upload.wikimedia.org/wikipedia/commons/d/de/UOTW_34_-_Ultrasound_of_the_Week_2.webm" type="video/webm; codecs=&quot;vp8&quot;" data-width="792" data-height="470" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/d/de/UOTW_34_-_Ultrasound_of_the_Week_2.webm/UOTW_34_-_Ultrasound_of_the_Week_2.webm.240p.vp9.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-transcodekey="240p.vp9.webm" data-width="404" data-height="240" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/d/de/UOTW_34_-_Ultrasound_of_the_Week_2.webm/UOTW_34_-_Ultrasound_of_the_Week_2.webm.360p.vp9.webm" type="video/webm; codecs=&quot;vp9, opus&quot;" data-transcodekey="360p.vp9.webm" data-width="606" data-height="360" /><source src="//upload.wikimedia.org/wikipedia/commons/transcoded/d/de/UOTW_34_-_Ultrasound_of_the_Week_2.webm/UOTW_34_-_Ultrasound_of_the_Week_2.webm.360p.webm" type="video/webm; codecs=&quot;vp8, vorbis&quot;" data-transcodekey="360p.webm" data-width="606" data-height="360" /></video></span></span></div> <div class="gallerytext">Pneumonia seen by ultrasound<sup id="cite_ref-UOTW34_77-1" class="reference"><a href="#cite_note-UOTW34-77"><span class="cite-bracket">&#91;</span>76<span class="cite-bracket">&#93;</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:UOTW_34_-_Ultrasound_of_the_Week_3.jpg" class="mw-file-description" title="Pneumonia seen by ultrasound[76]"><img alt="Pneumonia seen by ultrasound[76]" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/UOTW_34_-_Ultrasound_of_the_Week_3.jpg/120px-UOTW_34_-_Ultrasound_of_the_Week_3.jpg" decoding="async" width="120" height="71" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/UOTW_34_-_Ultrasound_of_the_Week_3.jpg/180px-UOTW_34_-_Ultrasound_of_the_Week_3.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/UOTW_34_-_Ultrasound_of_the_Week_3.jpg/240px-UOTW_34_-_Ultrasound_of_the_Week_3.jpg 2x" data-file-width="792" data-file-height="470" /></a></span></div> <div class="gallerytext">Pneumonia seen by ultrasound<sup id="cite_ref-UOTW34_77-2" class="reference"><a href="#cite_note-UOTW34-77"><span class="cite-bracket">&#91;</span>76<span class="cite-bracket">&#93;</span></a></sup></div> </li> <li class="gallerybox" style="width: 155px"> <div class="thumb" style="width: 150px; height: 150px;"><span typeof="mw:File"><a href="/wiki/File:RtPneuKidMark.png" class="mw-file-description" title="Right middle lobe pneumonia in a child as seen on plain X-ray"><img alt="Right middle lobe pneumonia in a child as seen on plain X-ray" src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/RtPneuKidMark.png/120px-RtPneuKidMark.png" decoding="async" width="120" height="118" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/RtPneuKidMark.png/180px-RtPneuKidMark.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c4/RtPneuKidMark.png/240px-RtPneuKidMark.png 2x" data-file-width="875" data-file-height="859" /></a></span></div> <div class="gallerytext">Right middle lobe pneumonia in a child as seen on plain X-ray</div> </li> </ul> <div class="mw-heading mw-heading3"><h3 id="Microbiology">Microbiology</h3></div> <p>In people managed in the community, determining the causative agent is not cost-effective and typically does not alter management.<sup id="cite_ref-Develop11_23-6" class="reference"><a href="#cite_note-Develop11-23"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> For people who do not respond to treatment, <a href="/wiki/Sputum_culture" title="Sputum culture">sputum culture</a> should be considered, and culture for <i>Mycobacterium tuberculosis</i> should be carried out in persons with a chronic productive cough.<sup id="cite_ref-BTS09_68-4" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> Microbiological evaluation is also indicated in severe pneumonia, alcoholism, <a href="/wiki/Asplenia" title="Asplenia">asplenia</a>, immunosuppression, HIV infection, and those being empirically treated for MRSA of pseudomonas.<sup id="cite_ref-Elena_2015_41-8" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Met2019_78-0" class="reference"><a href="#cite_note-Met2019-78"><span class="cite-bracket">&#91;</span>77<span class="cite-bracket">&#93;</span></a></sup> Although positive <a href="/wiki/Blood_culture" title="Blood culture">blood culture</a> and <a href="/wiki/Pleural_fluid" class="mw-redirect" title="Pleural fluid">pleural fluid</a> culture definitively establish the diagnosis of the type of micro-organism involved, a positive sputum culture has to be interpreted with care for the possibility of <a href="/wiki/Colonisation_(biology)" title="Colonisation (biology)">colonisation</a> of respiratory tract.<sup id="cite_ref-Elena_2015_41-9" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> Testing for other specific organisms may be recommended during outbreaks, for public health reasons.<sup id="cite_ref-BTS09_68-5" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> In those hospitalized for severe disease, both sputum and <a href="/wiki/Blood_cultures" class="mw-redirect" title="Blood cultures">blood cultures</a> are recommended,<sup id="cite_ref-BTS09_68-6" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> as well as testing the urine for <a href="/wiki/Antigen" title="Antigen">antigens</a> to <i>Legionella</i> and <i>Streptococcus</i>.<sup id="cite_ref-IDSA2007_79-0" class="reference"><a href="#cite_note-IDSA2007-79"><span class="cite-bracket">&#91;</span>78<span class="cite-bracket">&#93;</span></a></sup> Viral infections, can be confirmed via detection of either the virus or its antigens with <a href="/wiki/Viral_culture" title="Viral culture">culture</a> or <a href="/wiki/Polymerase_chain_reaction" title="Polymerase chain reaction">polymerase chain reaction</a> (PCR), among other techniques.<sup id="cite_ref-Lancet11_12-10" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> <i>Mycoplasma</i>, <i>Legionella</i>, <i>Streptococcus</i>, and <i>Chlamydia</i> can also be detected using PCR techniques on <a href="/wiki/Bronchoalveolar_lavage" title="Bronchoalveolar lavage">bronchoalveolar lavage</a> and <a href="/wiki/Nasopharyngeal_swab" title="Nasopharyngeal swab">nasopharyngeal swab</a>.<sup id="cite_ref-Elena_2015_41-10" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> The causative agent is determined in only 15% of cases with routine microbiological tests.<sup id="cite_ref-BMJ06_9-4" class="reference"><a href="#cite_note-BMJ06-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Classification">Classification</h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Classification_of_pneumonia" title="Classification of pneumonia">Classification of pneumonia</a></div> <p><i>Pneumonitis</i> refers to lung inflammation; pneumonia refers to pneumonitis, usually due to infection but sometimes non-infectious, that has the additional feature of <a href="/wiki/Pulmonary_consolidation" title="Pulmonary consolidation">pulmonary consolidation</a>.<sup id="cite_ref-80" class="reference"><a href="#cite_note-80"><span class="cite-bracket">&#91;</span>79<span class="cite-bracket">&#93;</span></a></sup> Pneumonia is most commonly classified by where or how it was acquired: community-acquired, aspiration, <a href="/wiki/Healthcare-associated_pneumonia" class="mw-redirect" title="Healthcare-associated pneumonia">healthcare-associated</a>, <a href="/wiki/Hospital-acquired_pneumonia" title="Hospital-acquired pneumonia">hospital-acquired</a>, and ventilator-associated pneumonia.<sup id="cite_ref-Rad07_42-7" class="reference"><a href="#cite_note-Rad07-42"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> It may also be classified by the area of the lung affected: lobar, <a href="/wiki/Bronchial_pneumonia" class="mw-redirect" title="Bronchial pneumonia">bronchial pneumonia</a> and <a href="/wiki/Acute_interstitial_pneumonia" class="mw-redirect" title="Acute interstitial pneumonia">acute interstitial pneumonia</a>;<sup id="cite_ref-Rad07_42-8" class="reference"><a href="#cite_note-Rad07-42"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> or by the causative organism.<sup id="cite_ref-81" class="reference"><a href="#cite_note-81"><span class="cite-bracket">&#91;</span>80<span class="cite-bracket">&#93;</span></a></sup> Pneumonia in children may additionally be classified based on signs and symptoms as non-severe, severe, or very severe.<sup id="cite_ref-82" class="reference"><a href="#cite_note-82"><span class="cite-bracket">&#91;</span>81<span class="cite-bracket">&#93;</span></a></sup> </p><p>The setting in which pneumonia develops is important to treatment,<sup id="cite_ref-Ana2009_83-0" class="reference"><a href="#cite_note-Ana2009-83"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-ATS2005_84-0" class="reference"><a href="#cite_note-ATS2005-84"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup> as it correlates to which pathogens are likely suspects,<sup id="cite_ref-Ana2009_83-1" class="reference"><a href="#cite_note-Ana2009-83"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> which mechanisms are likely, which antibiotics are likely to work or fail,<sup id="cite_ref-Ana2009_83-2" class="reference"><a href="#cite_note-Ana2009-83"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> and which complications can be expected based on the person's health status. </p> <div class="mw-heading mw-heading4"><h4 id="Community">Community</h4></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Community-acquired_pneumonia" title="Community-acquired pneumonia">Community-acquired pneumonia</a></div> <p>Community-acquired pneumonia (CAP) is acquired in the community,<sup id="cite_ref-Ana2009_83-3" class="reference"><a href="#cite_note-Ana2009-83"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-ATS2005_84-1" class="reference"><a href="#cite_note-ATS2005-84"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup> outside of health care facilities. Compared with healthcare-associated pneumonia, it is less likely to involve <a href="/wiki/Multiple_drug_resistance" title="Multiple drug resistance">multidrug-resistant</a> bacteria. Although the latter are no longer rare in CAP,<sup id="cite_ref-Ana2009_83-4" class="reference"><a href="#cite_note-Ana2009-83"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> they are still less likely. Prior stays in healthcare-related environments such as hospitals, nursing homes, or hemodialysis centers or a history of receiving domiciliary care can increase patients' risk for CAP caused by multidrug-resistant bacteria.<sup id="cite_ref-85" class="reference"><a href="#cite_note-85"><span class="cite-bracket">&#91;</span>84<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Healthcare">Healthcare</h4></div> <p>Health care–associated pneumonia (HCAP) is an infection associated with recent exposure to the health care system,<sup id="cite_ref-Ana2009_83-5" class="reference"><a href="#cite_note-Ana2009-83"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> including hospitals, outpatient clinics, <a href="/wiki/Nursing_home" title="Nursing home">nursing homes</a>, <a href="/wiki/Kidney_dialysis" title="Kidney dialysis">dialysis</a> centers, <a href="/wiki/Chemotherapy" title="Chemotherapy">chemotherapy</a> treatment, or <a href="/wiki/Home_care" title="Home care">home care</a>.<sup id="cite_ref-ATS2005_84-2" class="reference"><a href="#cite_note-ATS2005-84"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup> HCAP is sometimes called MCAP (medical care–associated pneumonia). </p><p>People may become infected with pneumonia in a hospital; this is defined as pneumonia not present at the time of admission (symptoms must start at least 48 hours after admission).<sup id="cite_ref-ATS2005_84-3" class="reference"><a href="#cite_note-ATS2005-84"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Ana2009_83-6" class="reference"><a href="#cite_note-Ana2009-83"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> It is likely to involve <a href="/wiki/Hospital-acquired_infection" title="Hospital-acquired infection">hospital-acquired infections</a>, with higher risk of <a href="/wiki/Multidrug-resistant" class="mw-redirect" title="Multidrug-resistant">multidrug-resistant</a> pathogens. People in a hospital often have other medical conditions, which may make them more susceptible to pathogens in the hospital. </p><p>Ventilator-associated pneumonia occurs in people breathing with the help of mechanical ventilation.<sup id="cite_ref-Ana2009_83-7" class="reference"><a href="#cite_note-Ana2009-83"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Ar2016_34-1" class="reference"><a href="#cite_note-Ar2016-34"><span class="cite-bracket">&#91;</span>33<span class="cite-bracket">&#93;</span></a></sup> Ventilator-associated pneumonia is specifically defined as pneumonia that arises more than 48 to 72 hours after <a href="/wiki/Endotracheal_intubation" class="mw-redirect" title="Endotracheal intubation">endotracheal intubation</a>.<sup id="cite_ref-ATS2005_84-4" class="reference"><a href="#cite_note-ATS2005-84"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Differential_diagnosis">Differential diagnosis</h3></div> <p>Several diseases can present with similar signs and symptoms to pneumonia, such as: chronic obstructive pulmonary disease, asthma, <a href="/wiki/Pulmonary_edema" title="Pulmonary edema">pulmonary edema</a>, <a href="/wiki/Bronchiectasis" title="Bronchiectasis">bronchiectasis</a>, lung cancer, and <a href="/wiki/Pulmonary_emboli" class="mw-redirect" title="Pulmonary emboli">pulmonary emboli</a>.<sup id="cite_ref-BMJ06_9-5" class="reference"><a href="#cite_note-BMJ06-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Unlike pneumonia, asthma and COPD typically present with wheezing, pulmonary edema presents with an abnormal <a href="/wiki/Electrocardiogram" class="mw-redirect" title="Electrocardiogram">electrocardiogram</a>, cancer and bronchiectasis present with a cough of longer duration, and pulmonary emboli present with acute onset sharp chest pain and shortness of breath.<sup id="cite_ref-BMJ06_9-6" class="reference"><a href="#cite_note-BMJ06-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> Mild pneumonia should be differentiated from upper respiratory tract infection (URTI). Severe pneumonia should be differentiated from <a href="/wiki/Acute_heart_failure" class="mw-redirect" title="Acute heart failure">acute heart failure</a>. Pulmonary infiltrates that resolved after giving mechanical ventilation should point to heart failure and <a href="/wiki/Atelectasis" title="Atelectasis">atelectasis</a> rather than pneumonia. For recurrent pneumonia, underlying lung cancer, <a href="/wiki/Metastasis" title="Metastasis">metastasis</a>, tuberculosis, a foreign bodies, immunosuppression, and hypersensitivity should be suspected.<sup id="cite_ref-Elena_2015_41-11" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Prevention">Prevention</h2></div> <p>Prevention includes <a href="/wiki/Vaccination" title="Vaccination">vaccination</a>, environmental measures, and appropriate treatment of other health problems.<sup id="cite_ref-Develop11_23-7" class="reference"><a href="#cite_note-Develop11-23"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> It is believed that, if appropriate preventive measures were instituted globally, mortality among children could be reduced by 400,000; and, if proper treatment were universally available, childhood deaths could be decreased by another 600,000.<sup id="cite_ref-WHOPrevent2012_25-3" class="reference"><a href="#cite_note-WHOPrevent2012-25"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Vaccination">Vaccination</h3></div> <p>Vaccination prevents against certain bacterial and viral pneumonias both in children and adults. <a href="/wiki/Influenza_vaccine" title="Influenza vaccine">Influenza vaccines</a> are modestly effective at preventing symptoms of influenza,<sup id="cite_ref-Lancet11_12-11" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-86" class="reference"><a href="#cite_note-86"><span class="cite-bracket">&#91;</span>85<span class="cite-bracket">&#93;</span></a></sup> The <a href="/wiki/Centers_for_Disease_Control_and_Prevention" title="Centers for Disease Control and Prevention">Centers for Disease Control and Prevention</a> (CDC) recommends yearly influenza vaccination for every person 6&#160;months and older.<sup id="cite_ref-87" class="reference"><a href="#cite_note-87"><span class="cite-bracket">&#91;</span>86<span class="cite-bracket">&#93;</span></a></sup> Immunizing health care workers decreases the risk of viral pneumonia among their patients.<sup id="cite_ref-IDSA2007_79-1" class="reference"><a href="#cite_note-IDSA2007-79"><span class="cite-bracket">&#91;</span>78<span class="cite-bracket">&#93;</span></a></sup> </p><p>Vaccinations against <i>Haemophilus influenzae</i> and <i>Streptococcus pneumoniae</i> have good evidence to support their use.<sup id="cite_ref-PedNA09_55-1" class="reference"><a href="#cite_note-PedNA09-55"><span class="cite-bracket">&#91;</span>54<span class="cite-bracket">&#93;</span></a></sup> There is strong evidence for vaccinating children under the age of 2 against <i>Streptococcus pneumoniae</i> (<a href="/wiki/Pneumococcal_conjugate_vaccine" title="Pneumococcal conjugate vaccine">pneumococcal conjugate vaccine</a>).<sup id="cite_ref-88" class="reference"><a href="#cite_note-88"><span class="cite-bracket">&#91;</span>87<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-89" class="reference"><a href="#cite_note-89"><span class="cite-bracket">&#91;</span>88<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-CDC2018Vac_90-0" class="reference"><a href="#cite_note-CDC2018Vac-90"><span class="cite-bracket">&#91;</span>89<span class="cite-bracket">&#93;</span></a></sup> Vaccinating children against <i>Streptococcus pneumoniae</i> has led to a decreased rate of these infections in adults, because many adults acquire infections from children. A <a href="/wiki/Pneumococcal_polysaccharide_vaccine" title="Pneumococcal polysaccharide vaccine"><i>Streptococcus pneumoniae</i> vaccine</a> is available for adults, and has been found to decrease the risk of <a href="/wiki/Invasive_pneumococcal_disease" class="mw-redirect" title="Invasive pneumococcal disease">invasive pneumococcal disease</a> by 74%, but there is insufficient evidence to suggest using the pneumococcal vaccine to prevent pneumonia or death in the general adult population.<sup id="cite_ref-91" class="reference"><a href="#cite_note-91"><span class="cite-bracket">&#91;</span>90<span class="cite-bracket">&#93;</span></a></sup> The CDC recommends that young children and adults over the age of 65 receive the pneumococcal vaccine, as well as older children or younger adults who have an increased risk of getting pneumococcal disease.<sup id="cite_ref-CDC2018Vac_90-1" class="reference"><a href="#cite_note-CDC2018Vac-90"><span class="cite-bracket">&#91;</span>89<span class="cite-bracket">&#93;</span></a></sup> The pneumococcal vaccine has been shown to reduce the risk of community acquired pneumonia in people with chronic obstructive pulmonary disease, but does not reduce mortality or the risk of hospitalization for people with this condition.<sup id="cite_ref-Walters2017_92-0" class="reference"><a href="#cite_note-Walters2017-92"><span class="cite-bracket">&#91;</span>91<span class="cite-bracket">&#93;</span></a></sup> People with COPD are recommended by a number of guidelines to have a pneumococcal vaccination.<sup id="cite_ref-Walters2017_92-1" class="reference"><a href="#cite_note-Walters2017-92"><span class="cite-bracket">&#91;</span>91<span class="cite-bracket">&#93;</span></a></sup> Other vaccines for which there is support for a protective effect against pneumonia include <a href="/wiki/Pertussis_vaccine" title="Pertussis vaccine">pertussis</a>, <a href="/wiki/Varicella_vaccine" title="Varicella vaccine">varicella</a>, and <a href="/wiki/Measles_vaccine" title="Measles vaccine">measles</a>.<sup id="cite_ref-CDCPrev2012_93-0" class="reference"><a href="#cite_note-CDCPrev2012-93"><span class="cite-bracket">&#91;</span>92<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Medications">Medications</h3></div> <p>When influenza outbreaks occur, medications such as <a href="/wiki/Amantadine" title="Amantadine">amantadine</a> or <a href="/wiki/Rimantadine" title="Rimantadine">rimantadine</a> may help prevent the condition, but they are associated with side effects.<sup id="cite_ref-jefferson_94-0" class="reference"><a href="#cite_note-jefferson-94"><span class="cite-bracket">&#91;</span>93<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Zanamivir" title="Zanamivir">Zanamivir</a> or <a href="/wiki/Oseltamivir" title="Oseltamivir">oseltamivir</a> decrease the chance that people who are exposed to the virus will develop symptoms; however, it is recommended that potential side effects are taken into account.<sup id="cite_ref-95" class="reference"><a href="#cite_note-95"><span class="cite-bracket">&#91;</span>94<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Other">Other</h3></div> <p><a href="/wiki/Smoking_cessation" title="Smoking cessation">Smoking cessation</a><sup id="cite_ref-BTS09_68-7" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> and reducing <a href="/wiki/Indoor_air_quality" title="Indoor air quality">indoor air pollution</a>, such as that from cooking indoors with wood, crop residues or <a href="/wiki/Feces" title="Feces">dung</a>, are both recommended.<sup id="cite_ref-Develop11_23-8" class="reference"><a href="#cite_note-Develop11-23"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-WHOPrevent2012_25-4" class="reference"><a href="#cite_note-WHOPrevent2012-25"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> Smoking appears to be the single biggest risk factor for <a href="/wiki/Pneumococcal_pneumonia" title="Pneumococcal pneumonia">pneumococcal pneumonia</a> in otherwise-healthy adults.<sup id="cite_ref-IDSA2007_79-2" class="reference"><a href="#cite_note-IDSA2007-79"><span class="cite-bracket">&#91;</span>78<span class="cite-bracket">&#93;</span></a></sup> Hand hygiene and coughing into one's sleeve may also be effective preventative measures.<sup id="cite_ref-CDCPrev2012_93-1" class="reference"><a href="#cite_note-CDCPrev2012-93"><span class="cite-bracket">&#91;</span>92<span class="cite-bracket">&#93;</span></a></sup> Wearing <a href="/wiki/Surgical_masks" class="mw-redirect" title="Surgical masks">surgical masks</a> by the sick may also prevent illness.<sup id="cite_ref-IDSA2007_79-3" class="reference"><a href="#cite_note-IDSA2007-79"><span class="cite-bracket">&#91;</span>78<span class="cite-bracket">&#93;</span></a></sup> </p><p>Appropriately treating underlying illnesses (such as HIV/AIDS, <a href="/wiki/Diabetes_mellitus" class="mw-redirect" title="Diabetes mellitus">diabetes mellitus</a>, and malnutrition) can decrease the risk of pneumonia.<sup id="cite_ref-WHOPrevent2012_25-5" class="reference"><a href="#cite_note-WHOPrevent2012-25"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-CDCPrev2012_93-2" class="reference"><a href="#cite_note-CDCPrev2012-93"><span class="cite-bracket">&#91;</span>92<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-96" class="reference"><a href="#cite_note-96"><span class="cite-bracket">&#91;</span>95<span class="cite-bracket">&#93;</span></a></sup> In children less than 6&#160;months of age, exclusive breast feeding reduces both the risk and severity of disease.<sup id="cite_ref-WHOPrevent2012_25-6" class="reference"><a href="#cite_note-WHOPrevent2012-25"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> In people with HIV/AIDS and a CD4 count of less than 200 cells/uL the antibiotic <a href="/wiki/Trimethoprim/sulfamethoxazole" title="Trimethoprim/sulfamethoxazole">trimethoprim/sulfamethoxazole</a> decreases the risk of <i>Pneumocystis pneumonia</i><sup id="cite_ref-97" class="reference"><a href="#cite_note-97"><span class="cite-bracket">&#91;</span>96<span class="cite-bracket">&#93;</span></a></sup> and is also useful for prevention in those that are immunocompromised but do not have HIV.<sup id="cite_ref-98" class="reference"><a href="#cite_note-98"><span class="cite-bracket">&#91;</span>97<span class="cite-bracket">&#93;</span></a></sup> </p><p>Testing pregnant women for <a href="/wiki/Group_B_Streptococcus" class="mw-redirect" title="Group B Streptococcus">Group B Streptococcus</a> and <i><a href="/wiki/Chlamydia_trachomatis" title="Chlamydia trachomatis">Chlamydia trachomatis</a></i>, and administering <a href="/wiki/Antibiotic" title="Antibiotic">antibiotic</a> treatment, if needed, reduces rates of pneumonia in infants;<sup id="cite_ref-99" class="reference"><a href="#cite_note-99"><span class="cite-bracket">&#91;</span>98<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-100" class="reference"><a href="#cite_note-100"><span class="cite-bracket">&#91;</span>99<span class="cite-bracket">&#93;</span></a></sup> preventive measures for HIV transmission from mother to child may also be efficient.<sup id="cite_ref-101" class="reference"><a href="#cite_note-101"><span class="cite-bracket">&#91;</span>100<span class="cite-bracket">&#93;</span></a></sup> Suctioning the mouth and throat of infants with <a href="/wiki/Meconium" title="Meconium">meconium</a>-stained <a href="/wiki/Amniotic_fluid" title="Amniotic fluid">amniotic fluid</a> has not been found to reduce the rate of aspiration pneumonia and may cause potential harm,<sup id="cite_ref-Rog2009_102-0" class="reference"><a href="#cite_note-Rog2009-102"><span class="cite-bracket">&#91;</span>101<span class="cite-bracket">&#93;</span></a></sup> thus this practice is not recommended in the majority of situations.<sup id="cite_ref-Rog2009_102-1" class="reference"><a href="#cite_note-Rog2009-102"><span class="cite-bracket">&#91;</span>101<span class="cite-bracket">&#93;</span></a></sup> In the frail elderly good oral health care may lower the risk of aspiration pneumonia,<sup id="cite_ref-103" class="reference"><a href="#cite_note-103"><span class="cite-bracket">&#91;</span>102<span class="cite-bracket">&#93;</span></a></sup> even though there is no good evidence that one approach to mouth care is better than others in preventing nursing home acquired pneumonia.<sup id="cite_ref-104" class="reference"><a href="#cite_note-104"><span class="cite-bracket">&#91;</span>103<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Zinc_supplementation" class="mw-redirect" title="Zinc supplementation">Zinc supplementation</a> in children 2 months to five years old appears to reduce rates of pneumonia.<sup id="cite_ref-105" class="reference"><a href="#cite_note-105"><span class="cite-bracket">&#91;</span>104<span class="cite-bracket">&#93;</span></a></sup> </p><p>For people with low levels of <a href="/wiki/Vitamin_C" title="Vitamin C">vitamin C</a> in their diet or blood, taking vitamin C supplements may be suggested to decrease the risk of pneumonia, although there is no strong evidence of benefit.<sup id="cite_ref-:0_106-0" class="reference"><a href="#cite_note-:0-106"><span class="cite-bracket">&#91;</span>105<span class="cite-bracket">&#93;</span></a></sup> There is insufficient evidence to recommend that the general population take vitamin C to prevent or treat pneumonia.<sup id="cite_ref-:0_106-1" class="reference"><a href="#cite_note-:0-106"><span class="cite-bracket">&#91;</span>105<span class="cite-bracket">&#93;</span></a></sup> </p><p>For adults and children in the hospital who require a respirator, there is no strong evidence indicating a difference between <a href="/wiki/Heat_and_moisture_exchanger" title="Heat and moisture exchanger">heat and moisture exchangers</a> and <a href="/wiki/Humidifier" title="Humidifier">heated humidifiers</a> for preventing pneumonia.<sup id="cite_ref-107" class="reference"><a href="#cite_note-107"><span class="cite-bracket">&#91;</span>106<span class="cite-bracket">&#93;</span></a></sup> There is tentative evidence that laying flat on the back compared to semi-raised increases pneumonia risks in people who are intubated.<sup id="cite_ref-108" class="reference"><a href="#cite_note-108"><span class="cite-bracket">&#91;</span>107<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Management">Management</h2></div> <table class="wikitable" align="right" style="margin-left:0.4em;"> <tbody><tr> <th colspan="2"><a href="/wiki/CURB-65" title="CURB-65">CURB-65</a> </th></tr> <tr> <th>Symptom</th> <th>Points </th></tr> <tr> <td><b>C</b>onfusion</td> <td style="text-align: center;">1 </td></tr> <tr> <td><b>U</b>rea&gt;7&#160;mmol/L</td> <td style="text-align: center;">1 </td></tr> <tr> <td><b>R</b>espiratory rate&gt;30</td> <td style="text-align: center;">1 </td></tr> <tr> <td><a href="/wiki/Blood_pressure" title="Blood pressure">S<b>B</b>P</a>&lt;90mmHg, D<b>B</b>P&lt;60mmHg</td> <td style="text-align: center;">1 </td></tr> <tr> <td>Age&gt;=<b>65</b></td> <td style="text-align: center;">1 </td></tr> </tbody></table> <p><a href="/wiki/Antibiotics" class="mw-redirect" title="Antibiotics">Antibiotics</a> by mouth, rest, simple <a href="/wiki/Analgesics" class="mw-redirect" title="Analgesics">analgesics</a>, and fluids usually suffice for complete resolution.<sup id="cite_ref-BTS09_68-8" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> However, those with other medical conditions, the elderly, or those with significant trouble breathing may require more advanced care. If the symptoms worsen, the pneumonia does not improve with home treatment, or complications occur, hospitalization may be required.<sup id="cite_ref-BTS09_68-9" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> Worldwide, approximately 7–13% of cases in children result in hospitalization,<sup id="cite_ref-Develop11_23-9" class="reference"><a href="#cite_note-Develop11-23"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> whereas in the developed world between 22 and 42% of adults with community-acquired pneumonia are admitted.<sup id="cite_ref-BTS09_68-10" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> The <a href="/wiki/CURB-65" title="CURB-65">CURB-65</a> score is useful for determining the need for admission in adults.<sup id="cite_ref-BTS09_68-11" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> If the score is 0 or 1, people can typically be managed at home; if it is 2, a short hospital stay or close follow-up is needed; if it is 3–5, hospitalization is recommended.<sup id="cite_ref-BTS09_68-12" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> In children those with <a href="/wiki/Dyspnea" class="mw-redirect" title="Dyspnea">respiratory distress</a> or oxygen saturations of less than 90% should be hospitalized.<sup id="cite_ref-PIDS11_109-0" class="reference"><a href="#cite_note-PIDS11-109"><span class="cite-bracket">&#91;</span>108<span class="cite-bracket">&#93;</span></a></sup> The utility of <a href="/wiki/Chest_physiotherapy" title="Chest physiotherapy">chest physiotherapy</a> in pneumonia has not yet been determined.<sup id="cite_ref-110" class="reference"><a href="#cite_note-110"><span class="cite-bracket">&#91;</span>109<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-111" class="reference"><a href="#cite_note-111"><span class="cite-bracket">&#91;</span>110<span class="cite-bracket">&#93;</span></a></sup> Over-the-counter <a href="/wiki/Cough_medicine" class="mw-redirect" title="Cough medicine">cough medicine</a> has not been found to be effective,<sup id="cite_ref-Chang2014_112-0" class="reference"><a href="#cite_note-Chang2014-112"><span class="cite-bracket">&#91;</span>111<span class="cite-bracket">&#93;</span></a></sup> nor has the use of zinc supplementation in children.<sup id="cite_ref-113" class="reference"><a href="#cite_note-113"><span class="cite-bracket">&#91;</span>112<span class="cite-bracket">&#93;</span></a></sup> There is insufficient evidence for <a href="/wiki/Mucolytics" class="mw-redirect" title="Mucolytics">mucolytics</a>.<sup id="cite_ref-Chang2014_112-1" class="reference"><a href="#cite_note-Chang2014-112"><span class="cite-bracket">&#91;</span>111<span class="cite-bracket">&#93;</span></a></sup> There is no strong evidence to recommend that children who have non-measles related pneumonia take <a href="/wiki/Vitamin_A" title="Vitamin A">vitamin A</a> supplements.<sup id="cite_ref-114" class="reference"><a href="#cite_note-114"><span class="cite-bracket">&#91;</span>113<span class="cite-bracket">&#93;</span></a></sup> Vitamin D, as of 2023, is of unclear benefit in children.<sup id="cite_ref-115" class="reference"><a href="#cite_note-115"><span class="cite-bracket">&#91;</span>114<span class="cite-bracket">&#93;</span></a></sup> Vitamin C administration in pneumonia needs further research, although it can be given to patient of low plasma vitamin C because it is not expensive and low risk.<sup id="cite_ref-:0_106-2" class="reference"><a href="#cite_note-:0-106"><span class="cite-bracket">&#91;</span>105<span class="cite-bracket">&#93;</span></a></sup> </p><p>Pneumonia can cause severe illness in a number of ways, and pneumonia with evidence of organ dysfunction may require <a href="/wiki/Intensive_care_unit" title="Intensive care unit">intensive care unit</a> admission for observation and specific treatment.<sup id="cite_ref-Phua_116-0" class="reference"><a href="#cite_note-Phua-116"><span class="cite-bracket">&#91;</span>115<span class="cite-bracket">&#93;</span></a></sup> The main impact is on the respiratory and the circulatory system. <a href="/wiki/Respiratory_failure" title="Respiratory failure">Respiratory failure</a> not responding to normal oxygen therapy may require <a href="/wiki/Heated_humidified_high-flow_therapy" title="Heated humidified high-flow therapy">heated humidified high-flow therapy</a> delivered through nasal cannulae,<sup id="cite_ref-Phua_116-1" class="reference"><a href="#cite_note-Phua-116"><span class="cite-bracket">&#91;</span>115<span class="cite-bracket">&#93;</span></a></sup> <a href="/wiki/Non-invasive_ventilation" title="Non-invasive ventilation">non-invasive ventilation</a>,<sup id="cite_ref-117" class="reference"><a href="#cite_note-117"><span class="cite-bracket">&#91;</span>116<span class="cite-bracket">&#93;</span></a></sup> or in severe cases mechanical ventilation through an endotracheal tube.<sup id="cite_ref-Phua_116-2" class="reference"><a href="#cite_note-Phua-116"><span class="cite-bracket">&#91;</span>115<span class="cite-bracket">&#93;</span></a></sup> Regarding circulatory problems as part of sepsis, evidence of poor blood flow or low blood pressure is initially treated with 30 mL/kg of <a href="/wiki/Crystalloid_solution" class="mw-redirect" title="Crystalloid solution">crystalloid</a> infused intravenously.<sup id="cite_ref-Elena_2015_41-12" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> In situations where fluids alone are ineffective, <a href="/wiki/Antihypotensive_agent" class="mw-redirect" title="Antihypotensive agent">vasopressor</a> medication may be required.<sup id="cite_ref-Phua_116-3" class="reference"><a href="#cite_note-Phua-116"><span class="cite-bracket">&#91;</span>115<span class="cite-bracket">&#93;</span></a></sup> </p><p>For adults with moderate or severe <a href="/wiki/Acute_respiratory_distress_syndrome" title="Acute respiratory distress syndrome">acute respiratory distress syndrome</a> (ARDS) undergoing mechanical ventilation, there is a reduction in mortality when people <a href="/wiki/Proning" title="Proning">lie on their front</a> for at least 12 hours a day. However, this increases the risk of endotracheal tube obstruction and pressure sores.<sup id="cite_ref-118" class="reference"><a href="#cite_note-118"><span class="cite-bracket">&#91;</span>117<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Bacterial_2">Bacterial</h3></div> <p>Antibiotics improve outcomes in those with bacterial pneumonia.<sup id="cite_ref-CochraneTx13_13-3" class="reference"><a href="#cite_note-CochraneTx13-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> The first dose of antibiotics should be given as soon as possible.<sup id="cite_ref-Elena_2015_41-13" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> Increased use of antibiotics, however, may lead to the development of <a href="/wiki/Antimicrobial_resistance" title="Antimicrobial resistance">antimicrobial resistant</a> strains of bacteria.<sup id="cite_ref-Pak2014_119-0" class="reference"><a href="#cite_note-Pak2014-119"><span class="cite-bracket">&#91;</span>118<span class="cite-bracket">&#93;</span></a></sup> Antibiotic choice depends initially on the characteristics of the person affected, such as age, underlying health, and the location the infection was acquired. Antibiotic use is also associated with side effects such as nausea, diarrhea, dizziness, taste distortion, or headaches.<sup id="cite_ref-Pak2014_119-1" class="reference"><a href="#cite_note-Pak2014-119"><span class="cite-bracket">&#91;</span>118<span class="cite-bracket">&#93;</span></a></sup> In the UK, <a href="/wiki/Empiric_therapy" title="Empiric therapy">treatment before culture results</a> with <a href="/wiki/Amoxicillin" title="Amoxicillin">amoxicillin</a> is recommended as the first line for community-acquired pneumonia, with <a href="/wiki/Doxycycline" title="Doxycycline">doxycycline</a> or <a href="/wiki/Clarithromycin" title="Clarithromycin">clarithromycin</a> as alternatives.<sup id="cite_ref-BTS09_68-13" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> In North America, amoxicillin, doxycycline, and in some areas a macrolide (such as <a href="/wiki/Azithromycin" title="Azithromycin">azithromycin</a> or <a href="/wiki/Erythromycin" title="Erythromycin">erythromycin</a>) is the first-line outpatient treatment in adults.<sup id="cite_ref-EOP10_43-1" class="reference"><a href="#cite_note-EOP10-43"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Lutfiyya_120-0" class="reference"><a href="#cite_note-Lutfiyya-120"><span class="cite-bracket">&#91;</span>119<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Met2019_78-1" class="reference"><a href="#cite_note-Met2019-78"><span class="cite-bracket">&#91;</span>77<span class="cite-bracket">&#93;</span></a></sup> In children with mild or moderate symptoms, amoxicillin taken by mouth is the first line.<sup id="cite_ref-PIDS11_109-1" class="reference"><a href="#cite_note-PIDS11-109"><span class="cite-bracket">&#91;</span>108<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-121" class="reference"><a href="#cite_note-121"><span class="cite-bracket">&#91;</span>120<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-122" class="reference"><a href="#cite_note-122"><span class="cite-bracket">&#91;</span>121<span class="cite-bracket">&#93;</span></a></sup> The use of <a href="/wiki/Fluoroquinolones" class="mw-redirect" title="Fluoroquinolones">fluoroquinolones</a> in uncomplicated cases is discouraged due to concerns about side-effects and generating resistance in light of there being no greater benefit.<sup id="cite_ref-EOP10_43-2" class="reference"><a href="#cite_note-EOP10-43"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-123" class="reference"><a href="#cite_note-123"><span class="cite-bracket">&#91;</span>122<span class="cite-bracket">&#93;</span></a></sup> </p><p>For those who require hospitalization and caught their pneumonia in the community the use of a β-lactam such as <a href="/wiki/Cephazolin" class="mw-redirect" title="Cephazolin">cephazolin</a> plus a macrolide such as azithromycin is recommended.<sup id="cite_ref-124" class="reference"><a href="#cite_note-124"><span class="cite-bracket">&#91;</span>123<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Met2019_78-2" class="reference"><a href="#cite_note-Met2019-78"><span class="cite-bracket">&#91;</span>77<span class="cite-bracket">&#93;</span></a></sup> A <a href="/wiki/Fluoroquinolone" class="mw-redirect" title="Fluoroquinolone">fluoroquinolone</a> may replace azithromycin but is less preferred.<sup id="cite_ref-Met2019_78-3" class="reference"><a href="#cite_note-Met2019-78"><span class="cite-bracket">&#91;</span>77<span class="cite-bracket">&#93;</span></a></sup> Antibiotics by mouth and by injection appear to be similarly effective in children with severe pneumonia.<sup id="cite_ref-Roj2006_125-0" class="reference"><a href="#cite_note-Roj2006-125"><span class="cite-bracket">&#91;</span>124<span class="cite-bracket">&#93;</span></a></sup> </p><p>The duration of treatment has traditionally been seven to ten days, but increasing evidence suggests that shorter courses (3–5 days) may be effective for certain types of pneumonia and may reduce the risk of antibiotic resistance.<sup id="cite_ref-126" class="reference"><a href="#cite_note-126"><span class="cite-bracket">&#91;</span>125<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-127" class="reference"><a href="#cite_note-127"><span class="cite-bracket">&#91;</span>126<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Pug2015_128-0" class="reference"><a href="#cite_note-Pug2015-128"><span class="cite-bracket">&#91;</span>127<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-129" class="reference"><a href="#cite_note-129"><span class="cite-bracket">&#91;</span>128<span class="cite-bracket">&#93;</span></a></sup> Research in children showed that a shorter, 3-day course of amoxicillin was as effective as a longer, 7-day course for treating pneumonia in this population.<sup id="cite_ref-130" class="reference"><a href="#cite_note-130"><span class="cite-bracket">&#91;</span>129<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-131" class="reference"><a href="#cite_note-131"><span class="cite-bracket">&#91;</span>130<span class="cite-bracket">&#93;</span></a></sup> For pneumonia that is associated with a ventilator caused by non-fermenting Gram-negative bacilli (NF-GNB), a shorter course of antibiotics increases the risk that the pneumonia will return.<sup id="cite_ref-Pug2015_128-1" class="reference"><a href="#cite_note-Pug2015-128"><span class="cite-bracket">&#91;</span>127<span class="cite-bracket">&#93;</span></a></sup> Recommendations for hospital-acquired pneumonia include third- and fourth-generation <a href="/wiki/Cephalosporins" class="mw-redirect" title="Cephalosporins">cephalosporins</a>, <a href="/wiki/Carbapenem" title="Carbapenem">carbapenems</a>, fluoroquinolones, <a href="/wiki/Aminoglycoside" title="Aminoglycoside">aminoglycosides</a>, and <a href="/wiki/Vancomycin" title="Vancomycin">vancomycin</a>.<sup id="cite_ref-ATS2005_84-5" class="reference"><a href="#cite_note-ATS2005-84"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup> These antibiotics are often given <a href="/wiki/Intravenous_therapy" title="Intravenous therapy">intravenously</a> and used in combination.<sup id="cite_ref-ATS2005_84-6" class="reference"><a href="#cite_note-ATS2005-84"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup> In those treated in hospital, more than 90% improve with the initial antibiotics.<sup id="cite_ref-M32_29-5" class="reference"><a href="#cite_note-M32-29"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> For people with ventilator-acquired pneumonia, the choice of antibiotic therapy will depend on the person's risk of being infected with a strain of bacteria that is <a href="/wiki/Multi-drug_resistant_bacteria" class="mw-redirect" title="Multi-drug resistant bacteria">multi-drug resistant</a>.<sup id="cite_ref-Ar2016_34-2" class="reference"><a href="#cite_note-Ar2016-34"><span class="cite-bracket">&#91;</span>33<span class="cite-bracket">&#93;</span></a></sup> Once clinically stable, intravenous antibiotics should be switched to oral antibiotics.<sup id="cite_ref-Elena_2015_41-14" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> For those with <i><a href="/wiki/Methicillin_resistant_Staphylococcus_aureus" class="mw-redirect" title="Methicillin resistant Staphylococcus aureus">Methicillin resistant Staphylococcus aureus</a></i> (MRSA) or <i>Legionella</i> infections, prolonged antibiotics may be beneficial.<sup id="cite_ref-Elena_2015_41-15" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> </p><p>The addition of <a href="/wiki/Corticosteroid" title="Corticosteroid">corticosteroids</a> to standard antibiotic treatment appears to improve outcomes, reducing death and morbidity for adults with severe community acquired pneumonia, and reducing death for adults and children with non-severe community acquired pneumonia.<sup id="cite_ref-Stern2017_132-0" class="reference"><a href="#cite_note-Stern2017-132"><span class="cite-bracket">&#91;</span>131<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-133" class="reference"><a href="#cite_note-133"><span class="cite-bracket">&#91;</span>132<span class="cite-bracket">&#93;</span></a></sup> A 2017 review therefore recommended them in adults with severe community acquired pneumonia.<sup id="cite_ref-Stern2017_132-1" class="reference"><a href="#cite_note-Stern2017-132"><span class="cite-bracket">&#91;</span>131<span class="cite-bracket">&#93;</span></a></sup> A 2019 guideline however recommended against their general use, unless refractory shock was present.<sup id="cite_ref-Met2019_78-4" class="reference"><a href="#cite_note-Met2019-78"><span class="cite-bracket">&#91;</span>77<span class="cite-bracket">&#93;</span></a></sup> Side effects associated with the use of corticosteroids include high blood sugar.<sup id="cite_ref-Stern2017_132-2" class="reference"><a href="#cite_note-Stern2017-132"><span class="cite-bracket">&#91;</span>131<span class="cite-bracket">&#93;</span></a></sup> There is some evidence that adding corticosteroids to the standard PCP pneumonia treatment may be beneficial for people who are infected with HIV.<sup id="cite_ref-Ewa2015_49-1" class="reference"><a href="#cite_note-Ewa2015-49"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup> </p><p>The use of granulocyte colony stimulating factor (G-CSF) along with antibiotics does not appear to reduce mortality and routine use for treating pneumonia is not supported by evidence.<sup id="cite_ref-134" class="reference"><a href="#cite_note-134"><span class="cite-bracket">&#91;</span>133<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Viral_2">Viral</h3></div> <p><a href="/wiki/Neuraminidase_inhibitors" class="mw-redirect" title="Neuraminidase inhibitors">Neuraminidase inhibitors</a> may be used to treat <a href="/wiki/Viral_pneumonia" title="Viral pneumonia">viral pneumonia</a> caused by influenza viruses (<a href="/wiki/Influenza_A" class="mw-redirect" title="Influenza A">influenza A</a> and <a href="/wiki/Influenza_B" class="mw-redirect" title="Influenza B">influenza B</a>).<sup id="cite_ref-Lancet11_12-12" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> No specific <a href="/wiki/Antiviral_drug" title="Antiviral drug">antiviral</a> medications are recommended for other types of community acquired viral pneumonias including <a href="/wiki/SARS" title="SARS">SARS coronavirus</a>, adenovirus, <a href="/wiki/Hantavirus" class="mw-redirect" title="Hantavirus">hantavirus</a>, and parainfluenza virus.<sup id="cite_ref-Lancet11_12-13" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> Influenza A may be treated with rimantadine or amantadine, while influenza A or B may be treated with oseltamivir, zanamivir or <a href="/wiki/Peramivir" title="Peramivir">peramivir</a>.<sup id="cite_ref-Lancet11_12-14" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> These are of most benefit if they are started within 48 hours of the onset of symptoms.<sup id="cite_ref-Lancet11_12-15" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> Many strains of <a href="/wiki/H5N1" class="mw-redirect" title="H5N1">H5N1</a> influenza A, also known as <a href="/wiki/Avian_influenza" title="Avian influenza">avian influenza</a> or "bird flu", have shown resistance to rimantadine and amantadine.<sup id="cite_ref-Lancet11_12-16" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> The use of antibiotics in viral pneumonia is recommended by some experts, as it is impossible to rule out a complicating bacterial infection.<sup id="cite_ref-Lancet11_12-17" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> The <a href="/wiki/British_Thoracic_Society" title="British Thoracic Society">British Thoracic Society</a> recommends that antibiotics be withheld in those with mild disease.<sup id="cite_ref-Lancet11_12-18" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> The use of corticosteroids is controversial.<sup id="cite_ref-Lancet11_12-19" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Aspiration">Aspiration</h3></div> <p>In general, <a href="/wiki/Chemical_pneumonitis" title="Chemical pneumonitis">aspiration pneumonitis</a> is treated conservatively with antibiotics indicated only for aspiration pneumonia.<sup id="cite_ref-PA2011_135-0" class="reference"><a href="#cite_note-PA2011-135"><span class="cite-bracket">&#91;</span>134<span class="cite-bracket">&#93;</span></a></sup> The choice of antibiotic will depend on several factors, including the suspected causative organism and whether pneumonia was acquired in the community or developed in a hospital setting. Common options include <a href="/wiki/Clindamycin" title="Clindamycin">clindamycin</a>, a combination of a <a href="/wiki/Beta-lactam_antibiotic" class="mw-redirect" title="Beta-lactam antibiotic">beta-lactam antibiotic</a> and <a href="/wiki/Metronidazole" title="Metronidazole">metronidazole</a>, or an aminoglycoside.<sup id="cite_ref-OConnor_136-0" class="reference"><a href="#cite_note-OConnor-136"><span class="cite-bracket">&#91;</span>135<span class="cite-bracket">&#93;</span></a></sup> Corticosteroids are sometimes used in aspiration pneumonia, but there is limited evidence to support their effectiveness.<sup id="cite_ref-PA2011_135-1" class="reference"><a href="#cite_note-PA2011-135"><span class="cite-bracket">&#91;</span>134<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Follow-up">Follow-up</h3></div> <p>The British Thoracic Society recommends that a follow-up chest radiograph be taken in people with persistent symptoms, smokers, and people older than 50.<sup id="cite_ref-BTS09_68-14" class="reference"><a href="#cite_note-BTS09-68"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> American guidelines vary, from generally recommending a follow-up chest radiograph<sup id="cite_ref-137" class="reference"><a href="#cite_note-137"><span class="cite-bracket">&#91;</span>136<span class="cite-bracket">&#93;</span></a></sup> to not mentioning any follow-up.<sup id="cite_ref-IDSA2007_79-4" class="reference"><a href="#cite_note-IDSA2007-79"><span class="cite-bracket">&#91;</span>78<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Prognosis">Prognosis</h2></div> <p>With treatment, most types of bacterial pneumonia will stabilize in 3–6&#160;days.<sup id="cite_ref-Behera2010_2-1" class="reference"><a href="#cite_note-Behera2010-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup> It often takes a few weeks before most symptoms resolve.<sup id="cite_ref-Behera2010_2-2" class="reference"><a href="#cite_note-Behera2010-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup> X-ray findings typically clear within four weeks and mortality is low (less than 1%).<sup id="cite_ref-Clinic2011_24-15" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-C6_138-0" class="reference"><a href="#cite_note-C6-138"><span class="cite-bracket">&#91;</span>137<span class="cite-bracket">&#93;</span></a></sup> In the elderly or people with other lung problems, recovery may take more than 12&#160;weeks. In persons requiring hospitalization, mortality may be as high as 10%, and in those requiring intensive care it may reach 30–50%.<sup id="cite_ref-Clinic2011_24-16" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Pneumonia is the most common <a href="/wiki/Nosocomial_infection" class="mw-redirect" title="Nosocomial infection">hospital-acquired infection</a> that causes death.<sup id="cite_ref-M32_29-6" class="reference"><a href="#cite_note-M32-29"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> Before the advent of antibiotics, mortality was typically 30% in those that were hospitalized.<sup id="cite_ref-EBMED05_22-8" class="reference"><a href="#cite_note-EBMED05-22"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> However, for those whose lung condition deteriorates within 72 hours, the problem is usually due to sepsis.<sup id="cite_ref-Elena_2015_41-16" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> If pneumonia deteriorates after 72 hours, it could be due to nosocomial infection or excerbation of other underlying comorbidities.<sup id="cite_ref-Elena_2015_41-17" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> About 10% of those discharged from hospital are readmitted due to underlying co-morbidities such as heart, lung, or neurological disorders, or due to new onset of pneumonia.<sup id="cite_ref-Elena_2015_41-18" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> </p><p>Complications may occur in particular in the elderly and those with underlying health problems.<sup id="cite_ref-C6_138-1" class="reference"><a href="#cite_note-C6-138"><span class="cite-bracket">&#91;</span>137<span class="cite-bracket">&#93;</span></a></sup> This may include, among others: <a href="/wiki/Empyema" title="Empyema">empyema</a>, lung abscess, <a href="/wiki/Bronchiolitis_obliterans" title="Bronchiolitis obliterans">bronchiolitis obliterans</a>, acute respiratory distress syndrome, sepsis, and worsening of underlying health problems.<sup id="cite_ref-C6_138-2" class="reference"><a href="#cite_note-C6-138"><span class="cite-bracket">&#91;</span>137<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Clinical_prediction_rules">Clinical prediction rules</h3></div> <p>Clinical prediction rules have been developed to more objectively predict outcomes of pneumonia.<sup id="cite_ref-M32_29-7" class="reference"><a href="#cite_note-M32-29"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> These rules are often used to decide whether to hospitalize the person.<sup id="cite_ref-M32_29-8" class="reference"><a href="#cite_note-M32-29"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup> </p> <ul><li><a href="/wiki/CURB-65" title="CURB-65">CURB-65</a> score, which takes into account the severity of symptoms, any underlying diseases, and age<sup id="cite_ref-139" class="reference"><a href="#cite_note-139"><span class="cite-bracket">&#91;</span>138<span class="cite-bracket">&#93;</span></a></sup></li> <li><a href="/wiki/Pneumonia_severity_index" title="Pneumonia severity index">Pneumonia severity index</a> (or <i>PSI Score</i>)<sup id="cite_ref-M32_29-9" class="reference"><a href="#cite_note-M32-29"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup></li></ul> <div class="mw-heading mw-heading3"><h3 id="Pleural_effusion,_empyema,_and_abscess"><span id="Pleural_effusion.2C_empyema.2C_and_abscess"></span>Pleural effusion, empyema, and abscess</h3></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Pleural_effusion.jpg" class="mw-file-description"><img alt="An X-ray showing a chest lying horizontally. The lower black area, which is the right lung, is smaller with a whiter area below it of a pulmonary effusion. Red arrows indicate size." src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Pleural_effusion.jpg/220px-Pleural_effusion.jpg" decoding="async" width="220" height="177" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Pleural_effusion.jpg/330px-Pleural_effusion.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e7/Pleural_effusion.jpg/440px-Pleural_effusion.jpg 2x" data-file-width="475" data-file-height="382" /></a><figcaption>A <a href="/wiki/Pleural_effusion" title="Pleural effusion">pleural effusion</a>: as seen on chest X-ray. The A arrow indicates fluid layering in the right chest. The B arrow indicates the width of the right lung. The volume of the lung is reduced because of the collection of fluid around the lung.</figcaption></figure> <p>In pneumonia, a collection of fluid may form in the <a href="/wiki/Pleural_cavity" title="Pleural cavity">space that surrounds the lung</a>.<sup id="cite_ref-Yu2011_140-0" class="reference"><a href="#cite_note-Yu2011-140"><span class="cite-bracket">&#91;</span>139<span class="cite-bracket">&#93;</span></a></sup> Occasionally, microorganisms will infect this fluid, causing an <a href="/wiki/Pleural_empyema" title="Pleural empyema">empyema</a>.<sup id="cite_ref-Yu2011_140-1" class="reference"><a href="#cite_note-Yu2011-140"><span class="cite-bracket">&#91;</span>139<span class="cite-bracket">&#93;</span></a></sup> To distinguish an empyema from the more common simple <a href="/wiki/Parapneumonic_effusion" title="Parapneumonic effusion">parapneumonic effusion</a>, the fluid may be collected with a needle (<a href="/wiki/Thoracentesis" title="Thoracentesis">thoracentesis</a>), and examined.<sup id="cite_ref-Yu2011_140-2" class="reference"><a href="#cite_note-Yu2011-140"><span class="cite-bracket">&#91;</span>139<span class="cite-bracket">&#93;</span></a></sup> If this shows evidence of empyema, complete drainage of the fluid is necessary, often requiring a <a href="/wiki/Chest_tube" title="Chest tube">drainage catheter</a>.<sup id="cite_ref-Yu2011_140-3" class="reference"><a href="#cite_note-Yu2011-140"><span class="cite-bracket">&#91;</span>139<span class="cite-bracket">&#93;</span></a></sup> In severe cases of empyema, <a href="/wiki/Decortication" title="Decortication">surgery</a> may be needed.<sup id="cite_ref-Yu2011_140-4" class="reference"><a href="#cite_note-Yu2011-140"><span class="cite-bracket">&#91;</span>139<span class="cite-bracket">&#93;</span></a></sup> If the infected fluid is not drained, the infection may persist, because antibiotics do not penetrate well into the pleural cavity. If the fluid is sterile, it must be drained only if it is causing symptoms or remains unresolved.<sup id="cite_ref-Yu2011_140-5" class="reference"><a href="#cite_note-Yu2011-140"><span class="cite-bracket">&#91;</span>139<span class="cite-bracket">&#93;</span></a></sup> </p><p>In rare circumstances, bacteria in the lung will form a pocket of infected fluid called a lung abscess.<sup id="cite_ref-Yu2011_140-6" class="reference"><a href="#cite_note-Yu2011-140"><span class="cite-bracket">&#91;</span>139<span class="cite-bracket">&#93;</span></a></sup> Lung abscesses can usually be seen with a chest X-ray but frequently require a chest CT scan to confirm the diagnosis.<sup id="cite_ref-Yu2011_140-7" class="reference"><a href="#cite_note-Yu2011-140"><span class="cite-bracket">&#91;</span>139<span class="cite-bracket">&#93;</span></a></sup> Abscesses typically occur in aspiration pneumonia, and often contain several types of bacteria. Long-term antibiotics are usually adequate to treat a lung abscess, but sometimes the abscess must be drained by a surgeon or <a href="/wiki/Interventional_radiology" title="Interventional radiology">radiologist</a>.<sup id="cite_ref-Yu2011_140-8" class="reference"><a href="#cite_note-Yu2011-140"><span class="cite-bracket">&#91;</span>139<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Respiratory_and_circulatory_failure">Respiratory and circulatory failure</h3></div> <p>Pneumonia can cause respiratory failure by triggering acute respiratory distress syndrome (ARDS), which results from a combination of infection and inflammatory response. The lungs quickly fill with fluid and become stiff. This stiffness, combined with severe difficulties extracting oxygen due to the alveolar fluid, may require long periods of mechanical ventilation for survival.<sup id="cite_ref-M31_44-9" class="reference"><a href="#cite_note-M31-44"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup> Other causes of circulatory failure are <a href="/wiki/Hypoxemia" title="Hypoxemia">hypoxemia</a>, inflammation, and increased coagulability.<sup id="cite_ref-Elena_2015_41-19" class="reference"><a href="#cite_note-Elena_2015-41"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> </p><p>Sepsis is a potential complication of pneumonia but usually occurs in people with poor immunity or <a href="/wiki/Hyposplenism" class="mw-redirect" title="Hyposplenism">hyposplenism</a>. The organisms most commonly involved are <i>Streptococcus pneumoniae</i>, <i>Haemophilus influenzae</i>, and <i>Klebsiella pneumoniae</i>. Other causes of the symptoms should be considered such as a <a href="/wiki/Myocardial_infarction" title="Myocardial infarction">myocardial infarction</a> or a pulmonary embolism.<sup id="cite_ref-C250_141-0" class="reference"><a href="#cite_note-C250-141"><span class="cite-bracket">&#91;</span>140<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Epidemiology">Epidemiology</h2></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Epidemiology_of_pneumonia" title="Epidemiology of pneumonia">Epidemiology of pneumonia</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Lower_respiratory_infections_world_map-Deaths_per_million_persons-WHO2012.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Lower_respiratory_infections_world_map-Deaths_per_million_persons-WHO2012.svg/290px-Lower_respiratory_infections_world_map-Deaths_per_million_persons-WHO2012.svg.png" decoding="async" width="290" height="128" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Lower_respiratory_infections_world_map-Deaths_per_million_persons-WHO2012.svg/435px-Lower_respiratory_infections_world_map-Deaths_per_million_persons-WHO2012.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d9/Lower_respiratory_infections_world_map-Deaths_per_million_persons-WHO2012.svg/580px-Lower_respiratory_infections_world_map-Deaths_per_million_persons-WHO2012.svg.png 2x" data-file-width="940" data-file-height="415" /></a><figcaption>Deaths from lower respiratory infections per million persons in 2012 <style data-mw-deduplicate="TemplateStyles:r1184024115">.mw-parser-output .div-col{margin-top:0.3em;column-width:30em}.mw-parser-output .div-col-small{font-size:90%}.mw-parser-output .div-col-rules{column-rule:1px solid #aaa}.mw-parser-output .div-col dl,.mw-parser-output .div-col ol,.mw-parser-output .div-col ul{margin-top:0}.mw-parser-output .div-col li,.mw-parser-output .div-col dd{page-break-inside:avoid;break-inside:avoid-column}</style><div class="div-col div-col-small" style="column-width: 10em;"><style data-mw-deduplicate="TemplateStyles:r981673959">.mw-parser-output .legend{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .legend-color{display:inline-block;min-width:1.25em;height:1.25em;line-height:1.25;margin:1px 0;text-align:center;border:1px solid black;background-color:transparent;color:black}.mw-parser-output .legend-text{}</style><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ffff20; color:black;">&#160;</span>&#160;24–120</div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ffe820; color:black;">&#160;</span>&#160;121–151</div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ffd820; color:black;">&#160;</span>&#160;152–200</div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ffc020; color:black;">&#160;</span>&#160;201–241</div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ffa020; color:black;">&#160;</span>&#160;242–345</div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ff9a20; color:black;">&#160;</span>&#160;346–436</div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#f08015; color:black;">&#160;</span>&#160;437–673</div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#e06815; color:black;">&#160;</span>&#160;674–864</div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#d85010; color:black;">&#160;</span>&#160;865–1,209</div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#d02010; color:white;">&#160;</span>&#160;1,210–2,085</div></div></figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Lower_respiratory_infections_world_map_-_DALY_-_WHO2004.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/75/Lower_respiratory_infections_world_map_-_DALY_-_WHO2004.svg/290px-Lower_respiratory_infections_world_map_-_DALY_-_WHO2004.svg.png" decoding="async" width="290" height="128" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/75/Lower_respiratory_infections_world_map_-_DALY_-_WHO2004.svg/435px-Lower_respiratory_infections_world_map_-_DALY_-_WHO2004.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/75/Lower_respiratory_infections_world_map_-_DALY_-_WHO2004.svg/580px-Lower_respiratory_infections_world_map_-_DALY_-_WHO2004.svg.png 2x" data-file-width="940" data-file-height="415" /></a><figcaption><a href="/wiki/Disability-adjusted_life_year" title="Disability-adjusted life year">Disability-adjusted life year</a> for lower respiratory infections per 100,000&#160;inhabitants in 2004<sup id="cite_ref-142" class="reference"><a href="#cite_note-142"><span class="cite-bracket">&#91;</span>141<span class="cite-bracket">&#93;</span></a></sup><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1184024115"><div class="div-col div-col-small" style="column-width: 10em;"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#b3b3b3; color:black;">&#160;</span>&#160;no data</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ffff65; color:black;">&#160;</span>&#160;less than 100</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#fff200; color:black;">&#160;</span>&#160;100–700</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ffdc00; color:black;">&#160;</span>&#160;700–1,400</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ffc600; color:black;">&#160;</span>&#160;1,400–2,100</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ffb000; color:black;">&#160;</span>&#160;2,100–2,800</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ff9a00; color:black;">&#160;</span>&#160;2,800–3,500</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ff8400; color:black;">&#160;</span>&#160;3,500–4,200</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ff6e00; color:black;">&#160;</span>&#160;4,200–4,900</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ff5800; color:black;">&#160;</span>&#160;4,900–5,600</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ff4200; color:black;">&#160;</span>&#160;5,600–6,300</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#ff2c00; color:black;">&#160;</span>&#160;6,300–7,000</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r981673959"><div class="legend"><span class="legend-color mw-no-invert" style="background-color:#cb0000; color:white;">&#160;</span>&#160;more than 7,000</div> </div></figcaption></figure> <p>Pneumonia is a common illness affecting approximately 450&#160;million people a year and occurring in all parts of the world.<sup id="cite_ref-Lancet11_12-20" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> It is a major cause of death among all age groups resulting in 4&#160;million deaths (7% of the world's total death) yearly.<sup id="cite_ref-Lancet11_12-21" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-CochraneTx13_13-4" class="reference"><a href="#cite_note-CochraneTx13-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> Rates are greatest in children less than five, and adults older than 75&#160;years.<sup id="cite_ref-Lancet11_12-22" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> It occurs about five times more frequently in the <a href="/wiki/Developing_world" class="mw-redirect" title="Developing world">developing world</a> than in the developed world.<sup id="cite_ref-Lancet11_12-23" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> Viral pneumonia accounts for about 200&#160;million cases.<sup id="cite_ref-Lancet11_12-24" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> In the United States, as of 2009<sup class="plainlinks noexcerpt noprint asof-tag update" style="display:none;"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Pneumonia&amp;action=edit">&#91;update&#93;</a></sup>, pneumonia is the 8th leading cause of death.<sup id="cite_ref-Clinic2011_24-17" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Children">Children</h3></div> <p>In 2008, pneumonia occurred in approximately 156&#160;million children (151&#160;million in the developing world and 5&#160;million in the developed world).<sup id="cite_ref-Lancet11_12-25" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup> In 2010, it resulted in 1.3&#160;million deaths, or 18% of all deaths in those under five years, of which 95% occurred in the developing world.<sup id="cite_ref-Lancet11_12-26" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Develop11_23-10" class="reference"><a href="#cite_note-Develop11-23"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-143" class="reference"><a href="#cite_note-143"><span class="cite-bracket">&#91;</span>142<span class="cite-bracket">&#93;</span></a></sup> Countries with the greatest burden of disease include India (43&#160;million), China (21&#160;million) and Pakistan (10&#160;million).<sup id="cite_ref-144" class="reference"><a href="#cite_note-144"><span class="cite-bracket">&#91;</span>143<span class="cite-bracket">&#93;</span></a></sup> It is the leading cause of death among children in <a href="/wiki/Low_income_countries" class="mw-redirect" title="Low income countries">low income countries</a>.<sup id="cite_ref-Lancet11_12-27" class="reference"><a href="#cite_note-Lancet11-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-CochraneTx13_13-5" class="reference"><a href="#cite_note-CochraneTx13-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> Many of these deaths occur in the <a href="/wiki/Neonatal" class="mw-redirect" title="Neonatal">newborn</a> period. The World Health Organization estimates that one in three newborn infant deaths is due to pneumonia.<sup id="cite_ref-garenne_145-0" class="reference"><a href="#cite_note-garenne-145"><span class="cite-bracket">&#91;</span>144<span class="cite-bracket">&#93;</span></a></sup> Approximately half of these deaths can be prevented, as they are caused by the bacteria for which an effective vaccine is available.<sup id="cite_ref-146" class="reference"><a href="#cite_note-146"><span class="cite-bracket">&#91;</span>145<span class="cite-bracket">&#93;</span></a></sup> The <a href="/wiki/Infectious_Diseases_Society_of_America" title="Infectious Diseases Society of America">IDSA</a> has recommended that children and infants with symptoms of CAP should be hospitalized so they have access to pediatric nursing care.<sup id="cite_ref-147" class="reference"><a href="#cite_note-147"><span class="cite-bracket">&#91;</span>146<span class="cite-bracket">&#93;</span></a></sup> In 2011, pneumonia was the most common reason for admission to the hospital after an emergency department visit in the U.S. for infants and children.<sup id="cite_ref-148" class="reference"><a href="#cite_note-148"><span class="cite-bracket">&#91;</span>147<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="History">History</h2></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:WPA_Pneumonia_Poster.jpg" class="mw-file-description"><img alt="A poster with a shark in the middle of it, which reads &quot;Pneumonia Strikes Like a Man-Eating Shark Led by its Pilot Fish the Common Cold&quot;" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/77/WPA_Pneumonia_Poster.jpg/220px-WPA_Pneumonia_Poster.jpg" decoding="async" width="220" height="332" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/77/WPA_Pneumonia_Poster.jpg/330px-WPA_Pneumonia_Poster.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/7/77/WPA_Pneumonia_Poster.jpg 2x" data-file-width="424" data-file-height="640" /></a><figcaption><a href="/wiki/Works_Progress_Administration" title="Works Progress Administration">WPA</a> poster, 1936/1937</figcaption></figure> <p>Pneumonia has been a common disease throughout human history.<sup id="cite_ref-History03_149-0" class="reference"><a href="#cite_note-History03-149"><span class="cite-bracket">&#91;</span>148<span class="cite-bracket">&#93;</span></a></sup> The word is from Greek πνεύμων (pneúmōn) meaning "lung".<sup id="cite_ref-150" class="reference"><a href="#cite_note-150"><span class="cite-bracket">&#91;</span>149<span class="cite-bracket">&#93;</span></a></sup> The symptoms were described by <a href="/wiki/Hippocrates" title="Hippocrates">Hippocrates</a> (<abbr title="circa">c.</abbr><span style="white-space:nowrap;">&#8201;460</span>–370 BC):<sup id="cite_ref-History03_149-1" class="reference"><a href="#cite_note-History03-149"><span class="cite-bracket">&#91;</span>148<span class="cite-bracket">&#93;</span></a></sup> "Peripneumonia, and pleuritic affections, are to be thus observed: If the fever be acute, and if there be pains on either side, or in both, and if expiration be if cough be present, and the sputa expectorated be of a blond or livid color, or likewise thin, frothy, and florid, or having any other character different from the common... When pneumonia is at its height, the case is beyond remedy if he is not purged, and it is bad if he has dyspnoea, and urine that is thin and acrid, and if sweats come out about the neck and head, for such sweats are bad, as proceeding from the suffocation, rales, and the violence of the disease which is obtaining the upper hand."<sup id="cite_ref-hippo_151-0" class="reference"><a href="#cite_note-hippo-151"><span class="cite-bracket">&#91;</span>150<span class="cite-bracket">&#93;</span></a></sup> However, Hippocrates referred to pneumonia as a disease "named by the ancients". He also reported the results of surgical drainage of empyemas. <a href="/wiki/Maimonides" title="Maimonides">Maimonides</a> (1135–1204 AD) observed: "The basic symptoms that occur in pneumonia and that are never lacking are as follows: acute fever, sticking <a href="/wiki/Pleuritic" class="mw-redirect" title="Pleuritic">pleuritic</a> pain in the side, short rapid breaths, serrated <a href="/wiki/Pulse" title="Pulse">pulse</a> and cough."<sup id="cite_ref-maimo_152-0" class="reference"><a href="#cite_note-maimo-152"><span class="cite-bracket">&#91;</span>151<span class="cite-bracket">&#93;</span></a></sup> This clinical description is quite similar to those found in modern textbooks, and it reflected the extent of medical knowledge through the <a href="/wiki/Middle_Ages" title="Middle Ages">Middle Ages</a> into the 19th century. </p><p><a href="/wiki/Edwin_Klebs" title="Edwin Klebs">Edwin Klebs</a> was the first to observe bacteria in the airways of persons having died of pneumonia in 1875.<sup id="cite_ref-klebs_153-0" class="reference"><a href="#cite_note-klebs-153"><span class="cite-bracket">&#91;</span>152<span class="cite-bracket">&#93;</span></a></sup> Initial work identifying the two common bacterial causes, <i>Streptococcus pneumoniae</i> and <i>Klebsiella pneumoniae</i>, was performed by <a href="/wiki/Carl_Friedl%C3%A4nder" title="Carl Friedländer">Carl Friedländer</a><sup id="cite_ref-fried_154-0" class="reference"><a href="#cite_note-fried-154"><span class="cite-bracket">&#91;</span>153<span class="cite-bracket">&#93;</span></a></sup> and <a href="/wiki/Albert_Fraenkel_(1848%E2%80%931916)" title="Albert Fraenkel (1848–1916)">Albert Fraenkel</a><sup id="cite_ref-fraenkel_155-0" class="reference"><a href="#cite_note-fraenkel-155"><span class="cite-bracket">&#91;</span>154<span class="cite-bracket">&#93;</span></a></sup> in 1882 and 1884, respectively. Friedländer's initial work introduced the <a href="/wiki/Gram_staining" class="mw-redirect" title="Gram staining">Gram stain</a>, a fundamental laboratory test still used today to identify and categorize bacteria. <a href="/wiki/Christian_Gram" class="mw-redirect" title="Christian Gram">Christian Gram</a>'s paper describing the procedure in 1884 helped to differentiate the two bacteria, and showed that pneumonia could be caused by more than one microorganism.<sup id="cite_ref-gram_156-0" class="reference"><a href="#cite_note-gram-156"><span class="cite-bracket">&#91;</span>155<span class="cite-bracket">&#93;</span></a></sup> In 1887, Jaccond demonstrated pneumonia may be caused by opportunistic bacteria always present in the lung.<sup id="cite_ref-157" class="reference"><a href="#cite_note-157"><span class="cite-bracket">&#91;</span>156<span class="cite-bracket">&#93;</span></a></sup> </p><p>Sir <a href="/wiki/William_Osler" title="William Osler">William Osler</a>, known as "the father of modern medicine", appreciated the death and disability caused by pneumonia, describing it as the "captain of the men of death" in 1918, as it had overtaken tuberculosis as one of the leading causes of death at the time. This phrase was originally coined by <a href="/wiki/John_Bunyan" title="John Bunyan">John Bunyan</a> in reference to "consumption" (tuberculosis).<sup id="cite_ref-158" class="reference"><a href="#cite_note-158"><span class="cite-bracket">&#91;</span>157<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-159" class="reference"><a href="#cite_note-159"><span class="cite-bracket">&#91;</span>158<span class="cite-bracket">&#93;</span></a></sup> Osler also described pneumonia as "the old man's friend" as death was often quick and painless when there were much slower and more painful ways to die.<sup id="cite_ref-EBMED05_22-9" class="reference"><a href="#cite_note-EBMED05-22"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> </p><p>Viral pneumonia was first described by <a href="/wiki/Hobart_Reimann" title="Hobart Reimann">Hobart Reimann</a> in 1938. Reimann, Chairman of the Department of Medicine at <a href="/wiki/Thomas_Jefferson_University" title="Thomas Jefferson University">Jefferson Medical College</a>, had established the practice of routinely typing the pneumococcal organism in cases where pneumonia presented. Out of this work, the distinction between viral and bacterial strains was noticed.<sup id="cite_ref-160" class="reference"><a href="#cite_note-160"><span class="cite-bracket">&#91;</span>159<span class="cite-bracket">&#93;</span></a></sup> </p><p>Several developments in the 1900s improved the outcome for those with pneumonia. With the advent of <a href="/wiki/Penicillin" title="Penicillin">penicillin</a> and other antibiotics, modern surgical techniques, and intensive care in the 20th century, mortality from pneumonia, which had approached 30%, dropped precipitously in the developed world. Vaccination of infants against <i>Haemophilus influenzae</i> type B began in 1988 and led to a dramatic decline in cases shortly thereafter.<sup id="cite_ref-adams_161-0" class="reference"><a href="#cite_note-adams-161"><span class="cite-bracket">&#91;</span>160<span class="cite-bracket">&#93;</span></a></sup> Vaccination against <i>Streptococcus pneumoniae</i> in adults began in 1977, and in children in 2000, resulting in a similar decline.<sup id="cite_ref-whit_162-0" class="reference"><a href="#cite_note-whit-162"><span class="cite-bracket">&#91;</span>161<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Society_and_culture">Society and culture</h2></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/List_of_notable_pneumonia_cases" class="mw-redirect" title="List of notable pneumonia cases">List of notable pneumonia cases</a></div> <div class="mw-heading mw-heading3"><h3 id="Awareness">Awareness</h3></div> <p>Due to the relatively low awareness of the disease, 12 November was declared in 2009 as the annual <a href="/wiki/World_Pneumonia_Day" title="World Pneumonia Day">World Pneumonia Day</a>, a day for concerned citizens and policy makers to take action against the disease.<sup id="cite_ref-163" class="reference"><a href="#cite_note-163"><span class="cite-bracket">&#91;</span>162<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-164" class="reference"><a href="#cite_note-164"><span class="cite-bracket">&#91;</span>163<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Costs">Costs</h3></div> <p>The global economic cost of community-acquired pneumonia has been estimated at $17&#160;billion annually.<sup id="cite_ref-Clinic2011_24-18" class="reference"><a href="#cite_note-Clinic2011-24"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup> Other estimates are considerably higher. In 2012 the estimated aggregate costs of treating pneumonia in the United States were $20&#160;billion;<sup id="cite_ref-165" class="reference"><a href="#cite_note-165"><span class="cite-bracket">&#91;</span>164<span class="cite-bracket">&#93;</span></a></sup> the median cost of a single pneumonia-related hospitalization is over $15,000.<sup id="cite_ref-166" class="reference"><a href="#cite_note-166"><span class="cite-bracket">&#91;</span>165<span class="cite-bracket">&#93;</span></a></sup> According to data released by the <a href="/wiki/Centers_for_Medicare_and_Medicaid_Services" class="mw-redirect" title="Centers for Medicare and Medicaid Services">Centers for Medicare and Medicaid Services</a>, average 2012 hospital charges for inpatient treatment of uncomplicated pneumonia in the U.S. were $24,549 and ranged as high as $124,000. The average cost of an emergency room consult for pneumonia was $943 and the average cost for medication was $66.<sup id="cite_ref-167" class="reference"><a href="#cite_note-167"><span class="cite-bracket">&#91;</span>166<span class="cite-bracket">&#93;</span></a></sup> Aggregate annual costs of treating pneumonia in Europe have been estimated at €10&#160;billion.<sup id="cite_ref-168" class="reference"><a href="#cite_note-168"><span class="cite-bracket">&#91;</span>167<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2></div> <p><b>Footnotes</b> </p> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-lower-alpha"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-18"><span class="mw-cite-backlink"><b><a href="#cite_ref-18">^</a></b></span> <span class="reference-text">The term <i>pneumonia</i> is sometimes more broadly applied to any condition resulting in inflammation of the lungs (caused for example by <a href="/wiki/Autoimmune_disease" title="Autoimmune disease">autoimmune diseases</a>, chemical burns or certain <a href="/wiki/Pharmaceutical_drug" class="mw-redirect" title="Pharmaceutical drug">medications</a>),<sup id="cite_ref-RespText09_3-2" class="reference"><a href="#cite_note-RespText09-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Jeff2010_4-1" class="reference"><a href="#cite_note-Jeff2010-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup> although this inflammation is more accurately referred to as <a href="/wiki/Pneumonitis" title="Pneumonitis">pneumonitis</a>.<sup id="cite_ref-isbn0-7234-3200-7_16-0" class="reference"><a href="#cite_note-isbn0-7234-3200-7-16"><span class="cite-bracket">&#91;</span>16<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Bowden2010_17-0" class="reference"><a href="#cite_note-Bowden2010-17"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup></span> </li> </ol></div></div> <p><b>Citations</b> </p> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-NIH2-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-NIH2_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.nhlbi.nih.gov/health/pneumonia/symptoms">"Pneumonia – Symptoms | NHLBI, NIH"</a>. <i>nhlbi.nih.gov</i>. 24 March 2022<span class="reference-accessdate">. Retrieved <span class="nowrap">1 October</span> 2022</span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=nhlbi.nih.gov&amp;rft.atitle=Pneumonia+%E2%80%93+Symptoms+%7C+NHLBI%2C+NIH&amp;rft.date=2022-03-24&amp;rft_id=https%3A%2F%2Fwww.nhlbi.nih.gov%2Fhealth%2Fpneumonia%2Fsymptoms&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3APneumonia" class="Z3988"></span></span> </li> <li id="cite_note-Behera2010-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-Behera2010_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Behera2010_2-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Behera2010_2-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBehera2010" class="citation book cs1">Behera D (2010). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=0TbJjd9eTp0C&amp;pg=PA296"><i>Textbook of pulmonary medicine</i></a> (2nd&#160;ed.). 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href="#cite_ref-Lancet11_12-7"><sup><i><b>h</b></i></sup></a> <a href="#cite_ref-Lancet11_12-8"><sup><i><b>i</b></i></sup></a> <a href="#cite_ref-Lancet11_12-9"><sup><i><b>j</b></i></sup></a> <a href="#cite_ref-Lancet11_12-10"><sup><i><b>k</b></i></sup></a> <a href="#cite_ref-Lancet11_12-11"><sup><i><b>l</b></i></sup></a> <a href="#cite_ref-Lancet11_12-12"><sup><i><b>m</b></i></sup></a> <a href="#cite_ref-Lancet11_12-13"><sup><i><b>n</b></i></sup></a> <a href="#cite_ref-Lancet11_12-14"><sup><i><b>o</b></i></sup></a> <a href="#cite_ref-Lancet11_12-15"><sup><i><b>p</b></i></sup></a> <a href="#cite_ref-Lancet11_12-16"><sup><i><b>q</b></i></sup></a> <a href="#cite_ref-Lancet11_12-17"><sup><i><b>r</b></i></sup></a> <a href="#cite_ref-Lancet11_12-18"><sup><i><b>s</b></i></sup></a> <a href="#cite_ref-Lancet11_12-19"><sup><i><b>t</b></i></sup></a> <a href="#cite_ref-Lancet11_12-20"><sup><i><b>u</b></i></sup></a> <a href="#cite_ref-Lancet11_12-21"><sup><i><b>v</b></i></sup></a> <a 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href="#cite_ref-CochraneTx13_13-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-CochraneTx13_13-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-CochraneTx13_13-5"><sup><i><b>f</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLodhaKabraPandey2013" class="citation journal cs1">Lodha R, Kabra SK, Pandey RM (June 2013). <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7017636">"Antibiotics for community-acquired pneumonia in children"</a>. <i>The Cochrane Database of Systematic Reviews</i>. <b>6</b> (6): CD004874. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1002%2F14651858.CD004874.pub4">10.1002/14651858.CD004874.pub4</a>. <a href="/wiki/PMC_(identifier)" class="mw-redirect" title="PMC (identifier)">PMC</a>&#160;<span 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title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=The+Cochrane+Database+of+Systematic+Reviews&amp;rft.atitle=Antibiotics+for+community-acquired+pneumonia+in+children&amp;rft.volume=6&amp;rft.issue=6&amp;rft.pages=CD004874&amp;rft.date=2013-06&amp;rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC7017636%23id-name%3DPMC&amp;rft_id=info%3Apmid%2F23733365&amp;rft_id=info%3Adoi%2F10.1002%2F14651858.CD004874.pub4&amp;rft.aulast=Lodha&amp;rft.aufirst=R&amp;rft.au=Kabra%2C+SK&amp;rft.au=Pandey%2C+RM&amp;rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC7017636&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3APneumonia" class="Z3988"></span></span> </li> <li id="cite_note-AcuteCare09-14"><span class="mw-cite-backlink"><b><a href="#cite_ref-AcuteCare09_14-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite 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title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Clinical+Infectious+Diseases&amp;rft.atitle=Infectious+Diseases+Society+of+America%2FAmerican+Thoracic+Society+consensus+guidelines+on+the+management+of+community-acquired+pneumonia+in+adults&amp;rft.volume=44&amp;rft.issue=Suppl+2&amp;rft.pages=S27-72&amp;rft.date=2007-03&amp;rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC7107997%23id-name%3DPMC&amp;rft_id=info%3Apmid%2F17278083&amp;rft_id=info%3Adoi%2F10.1086%2F511159&amp;rft.aulast=Mandell&amp;rft.aufirst=LA&amp;rft.au=Wunderink%2C+RG&amp;rft.au=Anzueto%2C+A&amp;rft.au=Bartlett%2C+JG&amp;rft.au=Campbell%2C+GD&amp;rft.au=Dean%2C+NC&amp;rft.au=Dowell%2C+SF&amp;rft.au=File%2C+TM&amp;rft.au=Musher%2C+DM&amp;rft.au=Niederman%2C+MS&amp;rft.au=Torres%2C+A&amp;rft.au=Whitney%2C+CG&amp;rft_id=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC7107997&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3APneumonia" class="Z3988"></span></span> </li> <li id="cite_note-80"><span class="mw-cite-backlink"><b><a href="#cite_ref-80">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation book cs1"><span class="id-lock-registration" title="Free registration required"><a rel="nofollow" class="external text" href="https://archive.org/details/stedmansmedicald00sted_3"><i>Stedman's medical dictionary</i></a></span> (28th&#160;ed.). 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class="Z3988"></span></span> </li> <li id="cite_note-166"><span class="mw-cite-backlink"><b><a href="#cite_ref-166">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://meps.ahrq.gov/mepsweb/data_stats/tables_compendia_hh_interactive.jsp?_SERVICE=MEPSSocket0&amp;_PROGRAM=MEPSPGM.TC.SAS&amp;File=HCFY2012&amp;Table=HCFY2012_CNDXP_CA&amp;_Debug=">"Household Component Summary Data Tables"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20170220165213/https://meps.ahrq.gov/mepsweb/data_stats/tables_compendia_hh_interactive.jsp?_SERVICE=MEPSSocket0&amp;_PROGRAM=MEPSPGM.TC.SAS&amp;File=HCFY2012&amp;Table=HCFY2012_CNDXP_CA&amp;_Debug=">Archived</a> from the original on 20 February 2017.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Household+Component+Summary+Data+Tables&amp;rft_id=http%3A%2F%2Fmeps.ahrq.gov%2Fmepsweb%2Fdata_stats%2Ftables_compendia_hh_interactive.jsp%3F_SERVICE%3DMEPSSocket0%26_PROGRAM%3DMEPSPGM.TC.SAS%26File%3DHCFY2012%26Table%3DHCFY2012_CNDXP_CA%26_Debug%3D&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3APneumonia" class="Z3988"></span></span> </li> <li id="cite_note-167"><span class="mw-cite-backlink"><b><a href="#cite_ref-167">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://www.washingtonpost.com/blogs/wonkblog/wp/2013/05/08/one-hospital-charges-8000-another-38000/">"One hospital charges $8,000 – another, $38,000"</a>. <i>The Washington Post</i>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=The+Washington+Post&amp;rft.atitle=One+hospital+charges+%248%2C000+%E2%80%93+another%2C+%2438%2C000&amp;rft_id=https%3A%2F%2Fwww.washingtonpost.com%2Fblogs%2Fwonkblog%2Fwp%2F2013%2F05%2F08%2Fone-hospital-charges-8000-another-38000%2F&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3APneumonia" class="Z3988"></span></span> </li> <li id="cite_note-168"><span class="mw-cite-backlink"><b><a href="#cite_ref-168">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWelteTorresNathwani2012" class="citation journal cs1">Welte T, Torres A, Nathwani D (January 2012). <a rel="nofollow" class="external text" href="https://doi.org/10.1136%2Fthx.2009.129502">"Clinical and economic burden of community-acquired pneumonia among adults in Europe"</a>. <i>Thorax</i>. <b>67</b> (1): 71–79. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1136%2Fthx.2009.129502">10.1136/thx.2009.129502</a></span>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a>&#160;<a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/20729232">20729232</a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=article&amp;rft.jtitle=Thorax&amp;rft.atitle=Clinical+and+economic+burden+of+community-acquired+pneumonia+among+adults+in+Europe&amp;rft.volume=67&amp;rft.issue=1&amp;rft.pages=71-79&amp;rft.date=2012-01&amp;rft_id=info%3Adoi%2F10.1136%2Fthx.2009.129502&amp;rft_id=info%3Apmid%2F20729232&amp;rft.aulast=Welte&amp;rft.aufirst=T&amp;rft.au=Torres%2C+A&amp;rft.au=Nathwani%2C+D&amp;rft_id=https%3A%2F%2Fdoi.org%2F10.1136%252Fthx.2009.129502&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3APneumonia" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading3"><h3 id="Bibliography">Bibliography</h3></div> <style data-mw-deduplicate="TemplateStyles:r1239549316">.mw-parser-output .refbegin{margin-bottom:0.5em}.mw-parser-output .refbegin-hanging-indents>ul{margin-left:0}.mw-parser-output .refbegin-hanging-indents>ul>li{margin-left:0;padding-left:3.2em;text-indent:-3.2em}.mw-parser-output .refbegin-hanging-indents ul,.mw-parser-output .refbegin-hanging-indents ul li{list-style:none}@media(max-width:720px){.mw-parser-output .refbegin-hanging-indents>ul>li{padding-left:1.6em;text-indent:-1.6em}}.mw-parser-output .refbegin-columns{margin-top:0.3em}.mw-parser-output .refbegin-columns ul{margin-top:0}.mw-parser-output .refbegin-columns li{page-break-inside:avoid;break-inside:avoid-column}@media screen{.mw-parser-output .refbegin{font-size:90%}}</style><div class="refbegin" style=""> <ul><li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFCunha2010" class="citation book cs1">Cunha BA, ed. (2010). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=VVgmFAbnrUgC"><i>Pneumonia essentials</i></a> (3rd&#160;ed.). Sudbury, MA: Physicians' Press. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-0-7637-7220-8" title="Special:BookSources/978-0-7637-7220-8"><bdi>978-0-7637-7220-8</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Pneumonia+essentials&amp;rft.place=Sudbury%2C+MA&amp;rft.edition=3rd&amp;rft.pub=Physicians%27+Press&amp;rft.date=2010&amp;rft.isbn=978-0-7637-7220-8&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DVVgmFAbnrUgC&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3APneumonia" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFMurray2010" class="citation book cs1">Murray JF (2010). <i>Murray and Nadel's textbook of respiratory medicine</i> (5th&#160;ed.). Philadelphia, PA: Saunders/Elsevier. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a>&#160;<a href="/wiki/Special:BookSources/978-1-4160-4710-0" title="Special:BookSources/978-1-4160-4710-0"><bdi>978-1-4160-4710-0</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Murray+and+Nadel%27s+textbook+of+respiratory+medicine&amp;rft.place=Philadelphia%2C+PA&amp;rft.edition=5th&amp;rft.pub=Saunders%2FElsevier&amp;rft.date=2010&amp;rft.isbn=978-1-4160-4710-0&amp;rft.aulast=Murray&amp;rft.aufirst=John+F.&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3APneumonia" class="Z3988"></span></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1235681985"><style data-mw-deduplicate="TemplateStyles:r1237033735">@media print{body.ns-0 .mw-parser-output .sistersitebox{display:none!important}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}</style><div class="side-box side-box-right plainlinks sistersitebox"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409"> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/34px-Wikiquote-logo.svg.png" decoding="async" width="34" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/51px-Wikiquote-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/68px-Wikiquote-logo.svg.png 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dd:first-child::before,.mw-parser-output .hlist dt dt:first-child::before,.mw-parser-output .hlist dt li:first-child::before,.mw-parser-output .hlist li dd:first-child::before,.mw-parser-output .hlist li dt:first-child::before,.mw-parser-output .hlist li li:first-child::before{content:" (";font-weight:normal}.mw-parser-output .hlist dd dd:last-child::after,.mw-parser-output .hlist dd dt:last-child::after,.mw-parser-output .hlist dd li:last-child::after,.mw-parser-output .hlist dt dd:last-child::after,.mw-parser-output .hlist dt dt:last-child::after,.mw-parser-output .hlist dt li:last-child::after,.mw-parser-output .hlist li dd:last-child::after,.mw-parser-output .hlist li dt:last-child::after,.mw-parser-output .hlist li li:last-child::after{content:")";font-weight:normal}.mw-parser-output .hlist ol{counter-reset:listitem}.mw-parser-output .hlist ol>li{counter-increment:listitem}.mw-parser-output .hlist ol>li::before{content:" "counter(listitem)"\a0 "}.mw-parser-output .hlist dd ol>li:first-child::before,.mw-parser-output .hlist dt ol>li:first-child::before,.mw-parser-output .hlist li ol>li:first-child::before{content:" ("counter(listitem)"\a0 "}</style><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"></div><div role="navigation" class="navbox" aria-label="Navbox" style="width:100%; margin:0.5em 0 0.5em 0;;padding:3px"><table class="nowraplinks navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;background: #EAECF0;color:black;">Classification</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><div style="position:relative; float:right; font-size:0.8em;"><a href="https://www.wikidata.org/wiki/Q12192" class="extiw" title="d:Q12192">D</a></div><div class="hlist" style="text-align:left;"><ul><li><b><a href="/wiki/International_Statistical_Classification_of_Diseases_and_Related_Health_Problems" class="mw-redirect" title="International Statistical Classification of Diseases and Related Health Problems">ICD</a>-<a href="/wiki/ICD-11" title="ICD-11">11</a></b>: <a rel="nofollow" class="external text" href="https://icd.who.int/browse/latest-release/mms/en#142052508">CA40</a>, <a rel="nofollow" class="external text" href="https://icd.who.int/browse/latest-release/mms/en#1975993872">CA71.0</a>, <a rel="nofollow" class="external text" href="https://icd.who.int/browse/latest-release/mms/en#594985340">KB24</a></li><li><b><a href="/wiki/International_Statistical_Classification_of_Diseases_and_Related_Health_Problems" class="mw-redirect" title="International Statistical Classification of Diseases and Related Health Problems">ICD</a>-<a href="/wiki/ICD-10" title="ICD-10">10</a></b>: <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/J10.0">J10.0</a>, <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/J11.0">J11.0</a> <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/J12">J12</a>, <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/J13">J13</a>, <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/J14">J14</a>, <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/J15">J15</a>, <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/J16">J16</a>, <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/J17">J17</a>, <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/J18">J18</a>, <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/J69.0">J69.0</a>, <a rel="nofollow" class="external text" href="https://icd.who.int/browse10/2019/en#/P23">P23</a></li><li><b><a href="/wiki/International_Statistical_Classification_of_Diseases_and_Related_Health_Problems" class="mw-redirect" title="International Statistical Classification of Diseases and Related Health Problems">ICD</a>-<a href="/wiki/List_of_ICD-9_codes" title="List of ICD-9 codes">9-CM</a></b>: <a rel="nofollow" class="external text" href="http://www.icd9data.com/getICD9Code.ashx?icd9=480">480</a>-<a rel="nofollow" class="external text" href="http://www.icd9data.com/getICD9Code.ashx?icd9=486">486</a>, <a rel="nofollow" class="external text" href="http://www.icd9data.com/getICD9Code.ashx?icd9=770.0">770.0</a></li><li><b><a href="/wiki/Medical_Subject_Headings" title="Medical Subject Headings">MeSH</a></b>: <a rel="nofollow" class="external text" href="https://meshb.nlm.nih.gov/record/ui?ui=D011014">D011014</a></li><li><b><a href="/wiki/Diseases_Database" title="Diseases Database">DiseasesDB</a></b>: <a rel="nofollow" class="external text" href="http://www.diseasesdatabase.com/ddb10166.htm">10166</a></li><li><b><a href="/wiki/SNOMED_CT" title="SNOMED CT">SNOMED CT</a></b>: <a rel="nofollow" class="external text" href="http://snomed.info/id/233604007">233604007</a></li></ul></div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background: #EAECF0;color:black;">External resources</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"><div class="hlist" style="text-align:left;"><ul><li><b><a href="/wiki/MedlinePlus" title="MedlinePlus">MedlinePlus</a></b>: <a rel="nofollow" class="external text" href="https://www.nlm.nih.gov/medlineplus/ency/article/000145.htm">000145</a></li><li><b><a href="/wiki/EMedicine" title="EMedicine">eMedicine</a></b>: <a rel="nofollow" class="external text" href="https://emedicine.medscape.com/search/pneumonia-overview">search/pneumonia</a></li><li><b><a href="/wiki/Patient_UK" title="Patient UK">Patient UK</a></b>: <a rel="nofollow" class="external text" href="https://patient.info/doctor/pneumonia-pro">Pneumonia</a></li><li><b>Scholia</b>: <a class="external text" href="https://tools.wmflabs.org/scholia/topic/Q12192">Q12192</a></li></ul></div></div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Pneumonia" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Pneumonia" title="Template:Pneumonia"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Pneumonia" title="Template talk:Pneumonia"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Pneumonia" title="Special:EditPage/Template:Pneumonia"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Pneumonia" style="font-size:114%;margin:0 4em"><a class="mw-selflink selflink">Pneumonia</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Infectious pneumonias</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bacterial_pneumonia" title="Bacterial pneumonia">Bacterial pneumonia</a></li> <li><a href="/wiki/Viral_pneumonia" title="Viral pneumonia">Viral pneumonia</a></li> <li><a href="/wiki/Fungal_pneumonia" title="Fungal pneumonia">Fungal pneumonia</a></li> <li><a href="/wiki/Parasitic_pneumonia" title="Parasitic pneumonia">Parasitic pneumonia</a></li> <li><a href="/wiki/Atypical_pneumonia" title="Atypical pneumonia">Atypical pneumonia</a></li> <li><a href="/wiki/Community-acquired_pneumonia" title="Community-acquired pneumonia">Community-acquired pneumonia</a></li> <li><a href="/wiki/Healthcare-associated_pneumonia" class="mw-redirect" title="Healthcare-associated pneumonia">Healthcare-associated pneumonia</a></li> <li><a href="/wiki/Hospital-acquired_pneumonia" title="Hospital-acquired pneumonia">Hospital-acquired pneumonia</a></li> <li><a href="/wiki/Ventilator-associated_pneumonia" title="Ventilator-associated pneumonia">Ventilator-associated pneumonia</a></li> <li><a href="/wiki/Severe_acute_respiratory_syndrome" class="mw-redirect" title="Severe acute respiratory syndrome">Severe acute respiratory syndrome</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Pneumonias caused by<br />infectious or noninfectious agents</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aspiration_pneumonia" title="Aspiration pneumonia">Aspiration pneumonia</a></li> <li><a href="/wiki/Lipid_pneumonia" title="Lipid pneumonia">Lipid pneumonia</a></li> <li><a href="/wiki/Eosinophilic_pneumonia" title="Eosinophilic pneumonia">Eosinophilic pneumonia</a></li> <li><a href="/wiki/Bronchiolitis_obliterans_organizing_pneumonia" class="mw-redirect" title="Bronchiolitis obliterans organizing pneumonia">Bronchiolitis obliterans organizing pneumonia</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Noninfectious pneumonia</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Chemical_pneumonitis" title="Chemical pneumonitis">Chemical pneumonitis</a></li> <li><a href="/wiki/Idiopathic_pneumonia_syndrome" title="Idiopathic pneumonia syndrome">Idiopathic pneumonia syndrome</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"></div><div role="navigation" class="navbox" aria-labelledby="Diseases_of_the_respiratory_system" style="padding:3px"><table class="nowraplinks mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Respiratory_pathology" title="Template:Respiratory pathology"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Respiratory_pathology" title="Template talk:Respiratory pathology"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Respiratory_pathology" title="Special:EditPage/Template:Respiratory pathology"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Diseases_of_the_respiratory_system" style="font-size:114%;margin:0 4em"><a href="/wiki/Respiratory_disease" title="Respiratory disease">Diseases of the respiratory system</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Upper_respiratory_tract_infection" title="Upper respiratory tract infection">Upper RT</a><br />(including <a href="/wiki/Upper_respiratory_tract_infection" title="Upper respiratory tract infection">URTIs</a>,<br /><a href="/wiki/Common_cold" title="Common cold">common cold</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Human_head" title="Human head">Head</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <dl><dt><i><a href="/wiki/Paranasal_sinuses" title="Paranasal sinuses">sinuses</a></i></dt> <dd></dd> <dd><a href="/wiki/Sinusitis" title="Sinusitis">Sinusitis</a></dd></dl> <dl><dt><i><a href="/wiki/Human_nose" title="Human nose">nose</a></i></dt> <dd></dd> <dd><a href="/wiki/Rhinitis" title="Rhinitis">Rhinitis</a> <dl><dd><a href="/wiki/Nonallergic_rhinitis" title="Nonallergic rhinitis">Vasomotor rhinitis</a></dd> <dd><a href="/wiki/Chronic_atrophic_rhinitis" title="Chronic atrophic rhinitis">Atrophic rhinitis</a></dd> <dd><a href="/wiki/Allergic_rhinitis" title="Allergic rhinitis">Hay fever</a></dd></dl></dd> <dd><a href="/wiki/Nasal_polyp" title="Nasal polyp">Nasal polyp</a></dd> <dd><a href="/wiki/Rhinorrhea" title="Rhinorrhea">Rhinorrhea</a></dd> <dd><i><a href="/wiki/Nasal_septum" title="Nasal septum">nasal septum</a></i> <dl><dd><a href="/wiki/Nasal_septum_deviation" title="Nasal septum deviation">Nasal septum deviation</a></dd> <dd><a href="/wiki/Nasal_septum_perforation" title="Nasal septum perforation">Nasal septum perforation</a></dd> <dd><a href="/wiki/Nasal_septal_hematoma" title="Nasal septal hematoma">Nasal septal hematoma</a></dd></dl></dd></dl> <dl><dt><i><a href="/wiki/Tonsil" title="Tonsil">tonsil</a></i></dt> <dd></dd> <dd><a href="/wiki/Tonsillitis" title="Tonsillitis">Tonsillitis</a></dd> <dd><a href="/wiki/Adenoid_hypertrophy" title="Adenoid hypertrophy">Adenoid hypertrophy</a></dd> <dd><a href="/wiki/Peritonsillar_abscess" title="Peritonsillar abscess">Peritonsillar abscess</a></dd></dl> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Neck" title="Neck">Neck</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <dl><dt><i><a href="/wiki/Pharynx" title="Pharynx">pharynx</a></i></dt> <dd></dd> <dd><a href="/wiki/Pharyngitis" title="Pharyngitis">Pharyngitis</a> <dl><dd><a href="/wiki/Streptococcal_pharyngitis" title="Streptococcal pharyngitis">Strep throat</a></dd></dl></dd> <dd><a href="/wiki/Laryngopharyngeal_reflux" title="Laryngopharyngeal reflux">Laryngopharyngeal reflux</a> (LPR)</dd> <dd><a href="/wiki/Retropharyngeal_abscess" title="Retropharyngeal abscess">Retropharyngeal abscess</a></dd></dl> <dl><dt><i><a href="/wiki/Larynx" title="Larynx">larynx</a></i></dt> <dd></dd> <dd><a href="/wiki/Croup" title="Croup">Croup</a></dd> <dd><a href="/wiki/Laryngomalacia" title="Laryngomalacia">Laryngomalacia</a></dd> <dd><a href="/wiki/Laryngeal_cyst" title="Laryngeal cyst">Laryngeal cyst</a></dd> <dd><a href="/wiki/Laryngitis" title="Laryngitis">Laryngitis</a></dd> <dd><a href="/wiki/Laryngopharyngeal_reflux" title="Laryngopharyngeal reflux">Laryngopharyngeal reflux</a> (LPR)</dd> <dd><a href="/wiki/Laryngospasm" title="Laryngospasm">Laryngospasm</a></dd></dl> <dl><dt><i><a href="/wiki/Vocal_cords" title="Vocal cords">vocal cords</a></i></dt> <dd></dd> <dd><a href="/wiki/Laryngopharyngeal_reflux" title="Laryngopharyngeal reflux">Laryngopharyngeal reflux</a> (LPR)</dd> <dd><a href="/wiki/Vocal_cord_nodule" title="Vocal cord nodule">Vocal fold nodule</a></dd> <dd><a href="/wiki/Vocal_cord_paresis" title="Vocal cord paresis">Vocal fold paresis</a></dd> <dd><a href="/wiki/Vocal_cord_dysfunction" title="Vocal cord dysfunction">Vocal cord dysfunction</a></dd></dl> <dl><dt><i><a href="/wiki/Epiglottis" title="Epiglottis">epiglottis</a></i></dt> <dd></dd> <dd><a href="/wiki/Epiglottitis" title="Epiglottitis">Epiglottitis</a></dd></dl> <dl><dt><i><a href="/wiki/Trachea" title="Trachea">trachea</a></i></dt> <dd></dd> <dd><a href="/wiki/Tracheitis" title="Tracheitis">Tracheitis</a></dd> <dd><a href="/wiki/Laryngotracheal_stenosis" title="Laryngotracheal stenosis">Laryngotracheal stenosis</a></dd></dl> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Lower_respiratory_tract" class="mw-redirect" title="Lower respiratory tract">Lower RT</a>/<br /><a href="/wiki/Respiratory_disease" title="Respiratory disease">lung disease</a><br />(including <a href="/wiki/Lower_respiratory_tract_infection" title="Lower respiratory tract infection">LRTIs</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Bronchus" title="Bronchus">Bronchial</a>/<br /><a href="/wiki/Obstructive_lung_disease" title="Obstructive lung disease">obstructive</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <dl><dt><i>acute</i></dt> <dd></dd> <dd><a href="/wiki/Acute_bronchitis" title="Acute bronchitis">Acute bronchitis</a></dd></dl> <dl><dt><i>chronic</i></dt> <dd></dd> <dd><a href="/wiki/Chronic_obstructive_pulmonary_disease" title="Chronic obstructive pulmonary disease">COPD</a> <dl><dd><a href="/wiki/Bronchitis#Chronic_bronchitis" title="Bronchitis">Chronic bronchitis</a></dd> <dd><a href="/wiki/Acute_exacerbation_of_chronic_obstructive_pulmonary_disease" title="Acute exacerbation of chronic obstructive pulmonary disease">Acute exacerbation of COPD</a>)</dd> <dd><a href="/wiki/Asthma" title="Asthma">Asthma</a> (<a href="/wiki/Status_asthmaticus" class="mw-redirect" title="Status asthmaticus">Status asthmaticus</a></dd> <dd><a href="/wiki/Aspirin-exacerbated_respiratory_disease" title="Aspirin-exacerbated respiratory disease">AERD</a></dd> <dd><a href="/wiki/Exercise-induced_asthma" class="mw-redirect" title="Exercise-induced asthma">Exercise-induced</a></dd></dl></dd> <dd><a href="/wiki/Bronchiectasis" title="Bronchiectasis">Bronchiectasis</a></dd> <dd><a href="/wiki/Cystic_fibrosis" title="Cystic fibrosis">Cystic fibrosis</a></dd></dl> <dl><dt><i>unspecified</i></dt> <dd></dd> <dd><a href="/wiki/Bronchitis" title="Bronchitis">Bronchitis</a></dd> <dd><a href="/wiki/Bronchiolitis" title="Bronchiolitis">Bronchiolitis</a> <dl><dd><a href="/wiki/Bronchiolitis_obliterans" title="Bronchiolitis obliterans">Bronchiolitis obliterans</a></dd></dl></dd> <dd><a href="/wiki/Diffuse_panbronchiolitis" title="Diffuse panbronchiolitis">Diffuse panbronchiolitis</a></dd></dl> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Interstitial_lung_disease" title="Interstitial lung disease">Interstitial</a>/<br /><a href="/wiki/Restrictive_lung_disease" title="Restrictive lung disease">restrictive</a><br />(<a href="/wiki/Pulmonary_fibrosis" title="Pulmonary fibrosis">fibrosis</a>)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">External agents/<br /><a href="/wiki/Occupational_disease" title="Occupational disease">occupational</a><br /><a href="/wiki/Occupational_lung_disease" title="Occupational lung disease">lung disease</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <dl><dd><a href="/wiki/Pneumoconiosis" title="Pneumoconiosis">Pneumoconiosis</a> <dl><dd><a href="/wiki/Aluminosis" title="Aluminosis">Aluminosis</a></dd> <dd><a href="/wiki/Asbestosis" title="Asbestosis">Asbestosis</a></dd> <dd><a href="/wiki/Baritosis" title="Baritosis">Baritosis</a></dd> <dd><a href="/wiki/Bauxite_fibrosis" title="Bauxite fibrosis">Bauxite fibrosis</a></dd> <dd><a href="/wiki/Berylliosis" title="Berylliosis">Berylliosis</a></dd> <dd><a href="/wiki/Caplan%27s_syndrome" title="Caplan&#39;s syndrome">Caplan's syndrome</a></dd> <dd><a href="/wiki/Chalicosis" title="Chalicosis">Chalicosis</a></dd> <dd><a href="/wiki/Coalworker%27s_pneumoconiosis" class="mw-redirect" title="Coalworker&#39;s pneumoconiosis">Coalworker's pneumoconiosis</a></dd> <dd><a href="/wiki/Siderosis" title="Siderosis">Siderosis</a></dd> <dd><a href="/wiki/Silicosis" title="Silicosis">Silicosis</a></dd> <dd><a href="/wiki/Pulmonary_talcosis" title="Pulmonary talcosis">Talcosis</a></dd> <dd><a href="/wiki/Byssinosis" title="Byssinosis">Byssinosis</a></dd></dl></dd></dl> <dl><dd><a href="/wiki/Hypersensitivity_pneumonitis" title="Hypersensitivity pneumonitis">Hypersensitivity pneumonitis</a> <dl><dd><a href="/wiki/Bagassosis" title="Bagassosis">Bagassosis</a></dd> <dd><a href="/wiki/Bird_fancier%27s_lung" title="Bird fancier&#39;s lung">Bird fancier's lung</a></dd> <dd><a href="/wiki/Farmer%27s_lung" title="Farmer&#39;s lung">Farmer's lung</a></dd> <dd><a href="/wiki/Lycoperdonosis" title="Lycoperdonosis">Lycoperdonosis</a></dd></dl></dd></dl> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Acute_respiratory_distress_syndrome" title="Acute respiratory distress syndrome">ARDS</a></li> <li><a href="/wiki/Combined_pulmonary_fibrosis_and_emphysema" title="Combined pulmonary fibrosis and emphysema">Combined pulmonary fibrosis and emphysema</a></li> <li><a href="/wiki/Pulmonary_edema" title="Pulmonary edema">Pulmonary edema</a></li> <li><a href="/wiki/L%C3%B6ffler%27s_syndrome" title="Löffler&#39;s syndrome">Löffler's syndrome</a>/<a href="/wiki/Eosinophilic_pneumonia" title="Eosinophilic pneumonia">Eosinophilic pneumonia</a></li> <li><a href="/wiki/Respiratory_hypersensitivity" class="mw-redirect" title="Respiratory hypersensitivity">Respiratory hypersensitivity</a> <ul><li><a href="/wiki/Allergic_bronchopulmonary_aspergillosis" title="Allergic bronchopulmonary aspergillosis">Allergic bronchopulmonary aspergillosis</a></li></ul></li> <li><a href="/wiki/Hamman%E2%80%93Rich_syndrome" class="mw-redirect" title="Hamman–Rich syndrome">Hamman–Rich syndrome</a></li> <li><a href="/wiki/Idiopathic_pulmonary_fibrosis" title="Idiopathic pulmonary fibrosis">Idiopathic pulmonary fibrosis</a></li> <li><a href="/wiki/Sarcoidosis" title="Sarcoidosis">Sarcoidosis</a></li> <li><a href="/wiki/Vaping-associated_pulmonary_injury" title="Vaping-associated pulmonary injury">Vaping-associated pulmonary injury</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Obstructive /<br /> Restrictive</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a class="mw-selflink selflink">Pneumonia</a>/<br /><a href="/wiki/Pneumonitis" title="Pneumonitis">pneumonitis</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">By pathogen</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Viral_pneumonia" title="Viral pneumonia">Viral</a></li> <li><a href="/wiki/Bacterial_pneumonia" title="Bacterial pneumonia">Bacterial</a> <ul><li><a href="/wiki/Pneumococcal_infection" title="Pneumococcal infection">Pneumococcal</a></li> <li><a href="/wiki/Klebsiella_pneumoniae#Klebsiella_pneumonia" title="Klebsiella pneumoniae">Klebsiella</a></li></ul></li> <li><a href="/wiki/Atypical_pneumonia" title="Atypical pneumonia">Atypical bacterial</a> <ul><li><a href="/wiki/Mycoplasma_pneumonia" title="Mycoplasma pneumonia">Mycoplasma</a></li> <li><a href="/wiki/Legionellosis" class="mw-redirect" title="Legionellosis">Legionnaires' disease</a></li> <li><a href="/wiki/Chlamydiota" title="Chlamydiota">Chlamydiae</a></li></ul></li> <li><a href="/wiki/Fungal_pneumonia" title="Fungal pneumonia">Fungal</a> <ul><li><a href="/wiki/Pneumocystis_pneumonia" title="Pneumocystis pneumonia">Pneumocystis</a></li></ul></li> <li><a href="/wiki/Parasitic_pneumonia" title="Parasitic pneumonia">Parasitic</a></li> <li><i>noninfectious</i> <ul><li><a href="/wiki/Chemical_pneumonia" class="mw-redirect" title="Chemical pneumonia">Chemical</a>/<a href="/wiki/Mendelson%27s_syndrome" title="Mendelson&#39;s syndrome">Mendelson's syndrome</a></li> <li><a href="/wiki/Aspiration_pneumonia" title="Aspiration pneumonia">Aspiration</a>/<a href="/wiki/Lipid_pneumonia" title="Lipid pneumonia">Lipid</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">By vector/route</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Community-acquired_pneumonia" title="Community-acquired pneumonia">Community-acquired</a></li> <li><a href="/wiki/Healthcare-associated_pneumonia" class="mw-redirect" title="Healthcare-associated pneumonia">Healthcare-associated</a></li> <li><a href="/wiki/Hospital-acquired_pneumonia" title="Hospital-acquired pneumonia">Hospital-acquired</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">By distribution</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bronchopneumonia" title="Bronchopneumonia">Broncho-</a></li> <li><a href="/wiki/Lobar_pneumonia" title="Lobar pneumonia">Lobar</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Idiopathic_interstitial_pneumonia" title="Idiopathic interstitial pneumonia">IIP</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Usual_interstitial_pneumonia" title="Usual interstitial pneumonia">UIP</a></li> <li><a href="/wiki/Desquamative_interstitial_pneumonia" title="Desquamative interstitial pneumonia">DIP</a></li> <li><a href="/wiki/Bronchiolitis_obliterans_organizing_pneumonia" class="mw-redirect" title="Bronchiolitis obliterans organizing pneumonia">BOOP-COP</a></li> <li><a href="/wiki/Nonspecific_interstitial_pneumonia" class="mw-redirect" title="Nonspecific interstitial pneumonia">NSIP</a></li> <li><a href="/wiki/Respiratory_bronchiolitis" title="Respiratory bronchiolitis">RB</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Atelectasis" title="Atelectasis">Atelectasis</a></li> <li><i>circulatory</i> <ul><li><a href="/wiki/Pulmonary_hypertension" title="Pulmonary hypertension">Pulmonary hypertension</a></li> <li><a href="/wiki/Pulmonary_embolism" title="Pulmonary embolism">Pulmonary embolism</a></li></ul></li> <li><a href="/wiki/Lung_abscess" title="Lung abscess">Lung abscess</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Pleural_cavity" title="Pleural cavity">Pleural cavity</a>/<br /><a href="/wiki/Mediastinum" title="Mediastinum">mediastinum</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Pleural_disease" title="Pleural disease">Pleural disease</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Pleurisy" title="Pleurisy">Pleuritis/pleurisy</a></li></ul> <ul><li><a href="/wiki/Pneumothorax" title="Pneumothorax">Pneumothorax</a>/<a href="/wiki/Hemopneumothorax" title="Hemopneumothorax">Hemopneumothorax</a></li></ul> <dl><dt><a href="/wiki/Pleural_effusion" title="Pleural effusion">Pleural effusion</a></dt> <dd></dd> <dd><a href="/wiki/Hemothorax" title="Hemothorax">Hemothorax</a></dd> <dd><a href="/wiki/Hydrothorax" title="Hydrothorax">Hydrothorax</a></dd> <dd><a href="/wiki/Chylothorax" title="Chylothorax">Chylothorax</a></dd> <dd><a href="/wiki/Pleural_empyema" title="Pleural empyema">Empyema/pyothorax</a></dd> <dd><a href="/wiki/Malignant_pleural_effusion" title="Malignant pleural effusion">Malignant</a></dd></dl> <dl><dd><a href="/wiki/Fibrothorax" title="Fibrothorax">Fibrothorax</a></dd></dl> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Mediastinal_disease" class="mw-redirect" title="Mediastinal disease">Mediastinal disease</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Mediastinitis" title="Mediastinitis">Mediastinitis</a></li> <li><a href="/wiki/Pneumomediastinum" title="Pneumomediastinum">Mediastinal emphysema</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other/general</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Respiratory_failure" title="Respiratory failure">Respiratory failure</a></li> <li><a href="/wiki/Influenza" title="Influenza">Influenza</a></li> <li><a href="/wiki/Common_cold" title="Common cold">Common cold</a></li> <li><a href="/wiki/Severe_acute_respiratory_syndrome" class="mw-redirect" title="Severe acute respiratory syndrome">SARS</a></li> <li><a href="/wiki/COVID-19" title="COVID-19">COVID-19</a></li> <li><a href="/wiki/Idiopathic_pulmonary_haemosiderosis" title="Idiopathic pulmonary haemosiderosis">Idiopathic pulmonary haemosiderosis</a></li> <li><a href="/wiki/Pulmonary_alveolar_proteinosis" title="Pulmonary alveolar proteinosis">Pulmonary alveolar proteinosis</a></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"><style data-mw-deduplicate="TemplateStyles:r1038841319">.mw-parser-output .tooltip-dotted{border-bottom:1px dotted;cursor:help}</style><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1038841319"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1038841319"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1038841319"></div><div role="navigation" class="navbox authority-control" aria-label="Navbox" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Help:Authority_control" title="Help:Authority control">Authority control databases</a>: National <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q12192#identifiers" title="Edit this at Wikidata"><img alt="Edit this at Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"><ul><li><span class="uid"><a rel="nofollow" class="external text" href="https://d-nb.info/gnd/4036659-5">Germany</a></span></li><li><span class="uid"><span class="rt-commentedText tooltip tooltip-dotted" title="Pneumonia"><a rel="nofollow" class="external text" href="https://id.loc.gov/authorities/sh85103627">United States</a></span></span></li><li><span class="uid"><span class="rt-commentedText tooltip tooltip-dotted" title="Pneumonie"><a rel="nofollow" class="external text" href="https://catalogue.bnf.fr/ark:/12148/cb13329658n">France</a></span></span></li><li><span class="uid"><span class="rt-commentedText tooltip tooltip-dotted" title="Pneumonie"><a rel="nofollow" class="external text" href="https://data.bnf.fr/ark:/12148/cb13329658n">BnF data</a></span></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://id.ndl.go.jp/auth/ndlna/00562778">Japan</a></span></li><li><span class="uid"><span class="rt-commentedText tooltip tooltip-dotted" title="pneumonie"><a rel="nofollow" class="external text" href="https://aleph.nkp.cz/F/?func=find-c&amp;local_base=aut&amp;ccl_term=ica=ph184923&amp;CON_LNG=ENG">Czech Republic</a></span></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="https://kopkatalogs.lv/F?func=direct&amp;local_base=lnc10&amp;doc_number=000128248&amp;P_CON_LNG=ENG">Latvia</a></span></li><li><span class="uid"><a rel="nofollow" class="external text" href="http://katalog.nsk.hr/F/?func=direct&amp;doc_number=002275398&amp;local_base=nsk10">Croatia</a></span><ul><li><span class="uid"><a rel="nofollow" class="external text" href="http://katalog.nsk.hr/F/?func=direct&amp;doc_number=000206573&amp;local_base=nsk10">2</a></span></li></ul></li><li><span class="uid"><a rel="nofollow" class="external text" href="http://olduli.nli.org.il/F/?func=find-b&amp;local_base=NLX10&amp;find_code=UID&amp;request=987007558094105171">Israel</a></span></li></ul></div></td></tr></tbody></table></div> <!-- NewPP 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