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mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A1%D1%96%D0%BD%D0%B3%D0%B0%D0%BC%D1%83%D1%81_%D1%82%D1%80%D0%B0%D1%85%D0%B5%D0%B9%D0%BD%D1%8B" title="Сінгамус трахейны – Belarusian" lang="be" hreflang="be" data-title="Сінгамус трахейны" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-ceb mw-list-item"><a href="https://ceb.wikipedia.org/wiki/Syngamus_trachea" title="Syngamus trachea – Cebuano" lang="ceb" hreflang="ceb" data-title="Syngamus trachea" data-language-autonym="Cebuano" data-language-local-name="Cebuano" class="interlanguage-link-target"><span>Cebuano</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Luftr%C3%B6hrenwurm" title="Luftröhrenwurm – German" lang="de" hreflang="de" data-title="Luftröhrenwurm" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Syngamus_trachea" title="Syngamus trachea – French" lang="fr" hreflang="fr" data-title="Syngamus trachea" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Syngamus_trachea" title="Syngamus trachea – Hungarian" lang="hu" hreflang="hu" data-title="Syngamus trachea" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Cacing_kuap" title="Cacing kuap – Malay" lang="ms" hreflang="ms" data-title="Cacing kuap" 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-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Gaapworm" title="Gaapworm – Dutch" lang="nl" hreflang="nl" data-title="Gaapworm" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Gapmask" title="Gapmask – Swedish" lang="sv" hreflang="sv" data-title="Gapmask" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/%C3%87atall%C4%B1_solucan" title="Çatallı solucan – Turkish" lang="tr" hreflang="tr" data-title="Çatallı solucan" data-language-autonym="Türkçe" data-language-local-name="Turkish" 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Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Gapeworm%22">"Gapeworm"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Gapeworm%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Gapeworm%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Gapeworm%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Gapeworm%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Gapeworm%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">March 2012</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <p class="mw-empty-elt"> </p> <table class="infobox biota" style="text-align: left; width: 200px; font-size: 100%"> <tbody><tr> <th colspan="2" style="color:inherit; text-align: center; background-color: rgb(235,235,210)">Gapeworm </th></tr> <tr> <td colspan="2" style="text-align: center"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:Gapeworms.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/89/Gapeworms.jpg/220px-Gapeworms.jpg" decoding="async" width="220" height="149" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/89/Gapeworms.jpg/330px-Gapeworms.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/8/89/Gapeworms.jpg 2x" data-file-width="376" data-file-height="254" /></a></span> </td></tr> <tr> <td colspan="2" style="text-align: center; font-size: 88%">Gapeworms in the trachea of a <a href="/wiki/Common_pheasant" title="Common pheasant">common pheasant</a> </td></tr> <tr> <th colspan="2" style="color:inherit; min-width:15em; text-align: center; background-color: rgb(235,235,210)"><a href="/wiki/Taxonomy_(biology)" title="Taxonomy (biology)">Scientific classification</a> <span class="plainlinks taxobox-edit-taxonomy skin-invert" style="font-size:smaller; float:right; padding-right:0.4em; margin-left:-3em;"><span typeof="mw:File"><a href="/wiki/Template:Taxonomy/Syngamus" title="Edit this classification"><img alt="Edit this classification" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr.svg/15px-OOjs_UI_icon_edit-ltr.svg.png" decoding="async" width="15" height="15" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr.svg/23px-OOjs_UI_icon_edit-ltr.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr.svg/30px-OOjs_UI_icon_edit-ltr.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span> </th></tr> <tr> <td>Domain: </td> <td><a href="/wiki/Eukaryote" title="Eukaryote">Eukaryota</a> </td></tr> <tr> <td>Kingdom: </td> <td><a href="/wiki/Animal" title="Animal">Animalia</a> </td></tr> <tr> <td>Phylum: </td> <td><a href="/wiki/Nematode" title="Nematode">Nematoda</a> </td></tr> <tr> <td>Class: </td> <td><a href="/wiki/Chromadorea" title="Chromadorea">Chromadorea</a> </td></tr> <tr> <td>Order: </td> <td><a href="/wiki/Rhabditida" title="Rhabditida">Rhabditida</a> </td></tr> <tr> <td>Family: </td> <td><a href="/wiki/Syngamidae" title="Syngamidae">Syngamidae</a> </td></tr> <tr> <td>Genus: </td> <td><a href="/wiki/Syngamus" title="Syngamus"><i>Syngamus</i></a> </td></tr> <tr> <td>Species: </td> <td><div style="display:inline" class="species"><i><b>S. trachea</b></i></div> </td></tr> <tr> <th colspan="2" style="color:inherit; text-align: center; background-color: rgb(235,235,210)"><a href="/wiki/Binomial_nomenclature" title="Binomial nomenclature">Binomial name</a> </th></tr> <tr> <td colspan="2" style="text-align: center"><b><span class="binomial"><span style="font-weight:normal;"></span><i>Syngamus trachea</i></span></b><br /><div style="font-size: 85%;"><a href="/wiki/George_Montagu_(naturalist)" title="George Montagu (naturalist)">Montagu</a>, 1811</div> </td></tr> </tbody></table><style data-mw-deduplicate="TemplateStyles:r1238732961">@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox.biota tr{background:transparent!important}html.skin-theme-clientpref-night .mw-parser-output .infobox.biota img{background:transparent}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox.biota tr{background:transparent!important}html.skin-theme-clientpref-os .mw-parser-output .infobox.biota img{background:white}}.mw-parser-output .infobox.biota .taxobox-edit-taxonomy img{background:transparent!important}body.skin-vector .mw-parser-output table.biota.infobox{margin-top:0.5em}body.skin--responsive .mw-parser-output table.biota.infobox tr.taxonrow td{padding:2px 10px}</style> <p>A <b>gapeworm</b> (<i>Syngamus trachea</i>), also known as a <b>red worm</b> and <b>forked worm</b>, is a <a href="/wiki/Parasitic" class="mw-redirect" title="Parasitic">parasitic</a> <a href="/wiki/Nematode" title="Nematode">nematode</a> worm that infects the <a href="/wiki/Vertebrate_trachea" class="mw-redirect" title="Vertebrate trachea">tracheas</a> of certain <a href="/wiki/Bird" title="Bird">birds</a>. The resulting disease, known as "gape", occurs when the worms clog and obstruct the airway. The worms are also known as "red worms" or "forked worms" due to their red color and the permanent <a href="/wiki/Procreative" class="mw-redirect" title="Procreative">procreative</a> conjunction of males and females. Gapeworms are common in young, domesticated <a href="/wiki/Chickens" class="mw-redirect" title="Chickens">chickens</a> and <a href="/wiki/Domestic_turkey" title="Domestic turkey">turkeys</a>. </p><p>When the female gapeworm lays her eggs in the trachea of an infected bird, the eggs are coughed up, swallowed, then defecated. Birds are infected with the parasite when they consume the eggs found in the <a href="/wiki/Feces" title="Feces">feces</a>, or by consuming a transport host such as <a href="/wiki/Earthworm" title="Earthworm">earthworms</a>, <a href="/wiki/Snail" title="Snail">snails</a> (<i><a href="/wiki/Planorbarius_corneus" title="Planorbarius corneus">Planorbarius corneus</a></i>, <i><a href="/wiki/Bithynia_tentaculata" title="Bithynia tentaculata">Bithynia tentaculata</a></i> and others) </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Morphology">Morphology</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gapeworm&action=edit&section=1" title="Edit section: Morphology"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1251242444" /><table class="box-More_citations_needed_section plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This section <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/Gapeworm" title="Special:EditPage/Gapeworm">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a> in this section. Unsourced material may be challenged and removed.</span> <span class="date-container"><i>(<span class="date">December 2012</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <p>Males and females are joined in a state of permanent copulation forming, a Y shape (<i>forked worms</i>). They are also known as the <i>red worms</i> because of their color. Females (up to 20mm long) are much longer than males (up to 6mm long). The <a href="/wiki/Biological_life_cycle" title="Biological life cycle">life cycle</a> of the gapeworm is peculiar in that transmission from bird to bird may be successfully accomplished either directly (by ingesting <a href="/wiki/Embryonated" title="Embryonated">embryonated eggs</a> or infective <a href="/wiki/Larvae" class="mw-redirect" title="Larvae">larvae</a>) or indirectly (by ingestion of earthworms containing free or <a href="/wiki/Encyst" class="mw-redirect" title="Encyst">encysted</a> gapeworm <a href="/wiki/Larvae" class="mw-redirect" title="Larvae">larvae</a> they had obtained by feeding on contaminated soil). </p> <div class="mw-heading mw-heading2"><h2 id="Life_cycle_and_pathogenesis">Life cycle and pathogenesis</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gapeworm&action=edit&section=2" title="Edit section: Life cycle and pathogenesis"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In the preparasitic phase, third stage infective larvae (L3) develop inside the eggs at which time they may hatch. Earthworms serve as transport (<a href="/wiki/Paratenic" class="mw-redirect" title="Paratenic">paratenic</a>) hosts. Larvae have been shown to remain viable for more than three years encapsulated in earthworm <a href="/wiki/Muscles" class="mw-redirect" title="Muscles">muscles</a>. Other invertebrates may also serve as paratenic hosts, including terrestrial <a href="/wiki/Snails" class="mw-redirect" title="Snails">snails</a> and <a href="/wiki/Slugs" class="mw-redirect" title="Slugs">slugs</a>. </p><p>The parasitic phase involves substantial migration in the <a href="/wiki/Definitive_host" class="mw-redirect" title="Definitive host">definitive host</a> to reach the predilection site. Young birds are most severely affected with migration of larvae and adults through the <a href="/wiki/Lungs" class="mw-redirect" title="Lungs">lungs</a> causing a severe <a href="/wiki/Pneumonia" title="Pneumonia">pneumonia</a>. <a href="/wiki/Lymphoid_nodules" class="mw-redirect" title="Lymphoid nodules">Lymphoid nodules</a> form at the point of attachment of the worms in the <a href="/wiki/Bronchi" class="mw-redirect" title="Bronchi">bronchi</a> and trachea. Adult worms also appear to feed on blood. Worms in the bronchi and trachea provoke a <a href="/wiki/Hemorrhagic" class="mw-redirect" title="Hemorrhagic">hemorrhagic</a> <a href="/wiki/Tracheitis" title="Tracheitis">tracheitis</a> and <a href="/wiki/Bronchitis" title="Bronchitis">bronchitis</a>, forming large quantities of <a href="/wiki/Mucus" title="Mucus">mucus</a>, plugging the air passages and, in severe cases, causing <a href="/wiki/Asphyxiation" class="mw-redirect" title="Asphyxiation">asphyxiation</a>. </p><p>Pheasants appear to be particularly susceptible to infections resulting in <a href="/wiki/Mortality_rates" class="mw-redirect" title="Mortality rates">mortality rates</a> as high as 25% during outbreaks. The rapidly growing worms soon obstruct the <a href="/wiki/Lumen_(anatomy)" title="Lumen (anatomy)">lumen</a> of the trachea, causing suffocation. Turkey poults, baby chicks and pheasant chicks are most susceptible to infection. Turkey poults usually develop gapeworm signs earlier and begin to die sooner after infection than young chickens. <a href="/wiki/Lesions" class="mw-redirect" title="Lesions">Lesions</a> are usually found in the trachea of turkeys and pheasants but seldom if ever in the tracheas of young chickens and <a href="/wiki/Guinea_fowl" class="mw-redirect" title="Guinea fowl">guinea fowl</a>. </p><p>The male worm, in the form of lesions, remains permanently attached to the tracheal wall throughout the duration of its life. The female worms apparently detach and reattach from time to time in order to obtain a more abundant supply of food. </p> <div class="mw-heading mw-heading2"><h2 id="Epidemiology">Epidemiology</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gapeworm&action=edit&section=3" title="Edit section: Epidemiology"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Earthworm transport hosts are important factors in the transmission of <i>Syngamus trachea</i> when poultry and <a href="/wiki/Game_bird" class="mw-redirect" title="Game bird">game birds</a> are reared on soil. The longevity of L3s in earthworms (up to 3 years) is particularly important in perpetuating the infection from year to year. </p><p>Wild birds may serve as reservoirs of infection and have been implicated as the sources of infections in outbreaks on game-bird farms as well as poultry farms. Wild <a href="/wiki/Reservoir_host" class="mw-redirect" title="Reservoir host">reservoir hosts</a> may include pheasants, <a href="/wiki/Ruffed_grouse" title="Ruffed grouse">ruffed grouse</a>, <a href="/wiki/Partridges" class="mw-redirect" title="Partridges">partridges</a>, <a href="/wiki/Wild_turkey" title="Wild turkey">wild turkeys</a>, <a href="/wiki/Magpies" class="mw-redirect" title="Magpies">magpies</a>, <a href="/wiki/Meadowlarks" class="mw-redirect" title="Meadowlarks">meadowlarks</a>, <a href="/wiki/American_robin" title="American robin">American robins</a>, <a href="/wiki/Grackle" title="Grackle">grackles</a>, <a href="/wiki/Jay_(bird)" class="mw-redirect" title="Jay (bird)">jays</a>, <a href="/wiki/Jackdaw" title="Jackdaw">jackdaws</a>, <a href="/wiki/Rook_(bird)" title="Rook (bird)">rooks</a>, <a href="/wiki/Starling" title="Starling">starlings</a> and <a href="/wiki/Crow" title="Crow">crows</a>. </p><p>There is also evidence to suggest that strains of <i>Syngamus trachea</i> from wild bird reservoir hosts may be less effective in domestic birds; if they have an earthworm transport host rather than direct infections via ingestion of L3s, or eggs containing L3s. </p> <div class="mw-heading mw-heading2"><h2 id="Clinical_signs">Clinical signs</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gapeworm&action=edit&section=4" title="Edit section: Clinical signs"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Blockage of the bronchi and trachea with worms and mucus will cause infected birds to gasp for air. They stretch out their necks, open their mouths and gasp for air producing a hissing noise as they do so. This "gaping" posture has given rise to the common term "gapeworm" to describe <i>Syngamus trachea</i>. </p><p>These clinical signs first appear approximately 1–2 weeks after infection. Birds infected with gapeworms show signs of weakness and <a href="/wiki/Emaciation" title="Emaciation">emaciation</a>, usually spending much of their time with eyes closed and head drawn back against the body. An infected bird may give its head a <a href="/wiki/Convulsive" class="mw-redirect" title="Convulsive">convulsive</a> shake in an attempt to remove the obstruction from the trachea so that normal breathing may be resumed. </p><p>Severely affected birds, particularly young ones, will deteriorate rapidly; they stop drinking and become <a href="/wiki/Anorexia_(symptom)" title="Anorexia (symptom)">anorexic</a>. At this stage, death is the usual outcome. Adult birds are usually less severely affected and may only show an occasional <a href="/wiki/Cough" title="Cough">cough</a> or even no obvious clinical signs. </p> <div class="mw-heading mw-heading2"><h2 id="Diagnosis">Diagnosis</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gapeworm&action=edit&section=5" title="Edit section: Diagnosis"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A diagnosis is usually made on the basis of the classical clinical signs of "gaping". Subclinical infections with few worms may be confirmed at <a href="/wiki/Necropsy" class="mw-redirect" title="Necropsy">necropsy</a> by finding copulating worms in the trachea and also by finding the characteristic eggs in the feces of infected birds. Examination of the tracheas of infected birds shows that the <a href="/wiki/Mucous_membrane" title="Mucous membrane">mucous membrane</a> is extensively irritated and <a href="/wiki/Inflamed" class="mw-redirect" title="Inflamed">inflamed</a>. Coughing is apparently the result of this irritation to the mucous lining. </p> <div class="mw-heading mw-heading2"><h2 id="Control_and_treatment">Control and treatment</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gapeworm&action=edit&section=6" title="Edit section: Control and treatment"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Prevention">Prevention</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gapeworm&action=edit&section=7" title="Edit section: Prevention"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In the artificial rearing of pheasants, gapes are a serious menace. Confinement rearing of young birds has reduced the problem in chickens compared to a few years ago. However, this parasite continues to present an occasional problem with turkeys raised on <a href="/wiki/Free_range" title="Free range">range</a>. Confinement rearing of <a href="/wiki/Broiler_chicken" class="mw-redirect" title="Broiler chicken">broilers/</a><a href="/wiki/Pullet" class="mw-redirect" title="Pullet">pullets</a> and caging of laying hens, have significantly influenced the quantity and variety of nematode infections in poultry. </p><p>For most nematodes, control measures consist of <a href="/wiki/Sanitation" title="Sanitation">sanitation</a> and breaking the life cycle rather than <a href="/wiki/Chemotherapy" title="Chemotherapy">chemotherapy</a>. Confinement rearing on <a href="/wiki/Litter_(animal)" class="mw-redirect" title="Litter (animal)">litter</a> largely prevents infections with nematodes using intermediate hosts such as earthworms or <a href="/wiki/Grasshopper" title="Grasshopper">grasshoppers</a>, which are not normally found in poultry houses. Conversely, nematodes with direct life cycles or those that utilize <a href="/wiki/Intermediate_host" class="mw-redirect" title="Intermediate host">intermediate hosts</a> such as <a href="/wiki/Beetle" title="Beetle">beetles</a>, which are common in poultry houses, may prosper. </p><p>Treatment of the soil or litter to kill intermediate hosts may be beneficial. Insecticides suitable for litter treatment include <a href="/wiki/Carbaryl" title="Carbaryl">carbaryl</a>, <a href="/wiki/Tetrachlorvinphos" title="Tetrachlorvinphos">tetrachlorvinphos</a> (stirofos). However, treatment is usually done only between grow-outs. Extreme care should be taken to ensure that <a href="/wiki/Fodder" title="Fodder">feed</a> and water are not contaminated. Treatment of range soil to kill ova is only partially successful. </p><p>Changing litter can reduce infections, but treating floors with oil is not very effective. Raising different species or different ages of birds together or in close proximity is a dangerous procedure as regards <a href="/wiki/Parasitism" title="Parasitism">parasitism</a>. Adult turkeys, which are carriers of gapeworms, can transmit the disease to young chicks or pheasants, although older chickens are almost resistant to infection. </p> <div class="mw-heading mw-heading3"><h3 id="Treatment">Treatment</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gapeworm&action=edit&section=8" title="Edit section: Treatment"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Flubendazole" title="Flubendazole">Flubendazole</a> (Flubenvet) is the only licensed<sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Naming_conventions_(geographic_names)" title="Wikipedia:Naming conventions (geographic names)"><span title="The geographic scope near this tag is ambiguous. (April 2022)">where?</span></a></i>]</sup> <a href="/wiki/Anthelmintic" title="Anthelmintic">anthelmintic</a> for use in poultry and game birds. Continuous medication of pen-reared birds has been recommended, but is not economical and increases the possibility of drug resistance. Several other compounds have been shown effective against <i>S. trachea</i> under experimental conditions. Methyl 5-benzoyl-2-benzimidazole was 100% efficacious when fed <a href="/wiki/Prophylactically" class="mw-redirect" title="Prophylactically">prophylactically</a> to turkey poults. 5-Isopropoxycarbonylamino-2-(4-thizolyl)-benzimidazole was found to be more efficacious than thiabendazole or <a href="/w/index.php?title=Disophenol&action=edit&redlink=1" class="new" title="Disophenol (page does not exist)">disophenol</a>. </p><p>The level of control with three treatments of <a href="/w/index.php?title=Cambendazole&action=edit&redlink=1" class="new" title="Cambendazole (page does not exist)">cambendazole</a> on days 3–4, 6–7, and 16-17 post-infection was 94.9% in chickens and 99.1% in turkeys. <a href="/wiki/Levamisole" title="Levamisole">Levamisole</a> (Ergamisol), fed at a level of 0.04% for 2 days or 2 g/gal drinking water for 1 day each month, has proven effective in game birds. <a href="/wiki/Fenbendazole" title="Fenbendazole">Fenbendazole</a> (Panacur) at 20 mg/kg for 3–4 days is also effective. <a href="/wiki/Ivermectin" title="Ivermectin">Ivermectin</a> injections may be effective in treating resistant strains. </p> <div class="mw-heading mw-heading2"><h2 id="Sources">Sources</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Gapeworm&action=edit&section=9" title="Edit section: Sources"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <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 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identifiers">Taxon identifiers</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: left;"><i>Syngamus trachea</i></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 style="white-space:nowrap;"><a href="/wiki/Wikidata" title="Wikidata">Wikidata</a>: <span class="uid"><span class="external"><a href="https://www.wikidata.org/wiki/Q5266533" class="extiw" title="wikidata:Q5266533">Q5266533</a></span></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Wikispecies" title="Wikispecies">Wikispecies</a>: <span class="uid"><span class="external"><a href="https://species.wikimedia.org/wiki/Syngamus_trachea" class="extiw" title="wikispecies:Syngamus trachea">Syngamus trachea</a></span></span></span></li> <li><span style="white-space:nowrap;"><a href="/wiki/Australian_Faunal_Directory" title="Australian Faunal Directory">AFD</a>: <span class="uid"><a 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