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Microbiology Research: microbes, bacterial & viral pathogens

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</div> </div> </div> <div id="caspertesting"> <div class="container_16"> <div id="page-breadcrumb" class="grid_16"> <div class="breadcrumb"><a href="/">Home</a> &#187; <a href="/research-areas.html">Research Areas</a> &#187; Microbiology</div> <div class="region region-banners"> <div id="block-block-26" class="block block-block"> <div class="content"> <div class="container_12"><a href="https://www.bio-techne.com/account/novus-bio-techne/login?_ga=2.17257593.151271452&lt;br /&gt;&#10;5.1724696046-473375462.1712005244" style="margin: 0 10px;" target="_blank"><img alt="Novus Biologicals products are now on bio-techne.com" src="https://images.novusbio.com/design/ready-to-buy-novus-products-login.png" style="height:120px; width:940px" /></a></div> </div> </div> </div> <div class="clear"></div> <div class="ra-header"><img src="https://images.novusbio.com/design/nb-microbiology-ra-banner2.jpg" class="ra-header" alt="Microbiology" /></div> </div> <div class="main grid_4"> <div class="ra-menu"><ul><li class="active"><a href="/research-areas/microbiology">Microbiology</a></li><li><a href="/research-areas/microbiology/bacterial-pathogens">Bacterial Pathogens</a></li><li><a href="/research-areas/microbiology/gut-brain-axis">Gut-Brain Axis Resources</a></li><li><a href="/research-areas/microbiology/viral-pathogens">Viral Pathogens</a></li></ul></div><div class="ra-publications"><div class="ra-left-header">Publications</div><div class="ra-left-body"><ul class="ra-publist"><li><a href="/support/gut-brain-axis-poster" target="_blank"><img src="https://images.novusbio.com/design/gut-brain-poster-187px.jpg" /></a></li><li><a href="https://resources.rndsystems.com/images/site/rnd-systems-coronavirus-research-br.pdf" target="_blank"><img src="https://images.novusbio.com/design/bt-coronavirus-br.jpg" /></a></li><li><a href="https://acdbio.com/science/applications/research-areas/covid-19-coronavirus" target="_blank"><img src="https://images.novusbio.com/design/acd-covid19-flyer.jpg" /></a></li><li><a href="https://www.rndsystems.com/resources/posters/pattern-recognition-receptors-innate-immune-response" target="_blank"><img src="https://images.novusbio.com/design/PRR-poster-resource-187px.jpg" /></a></li></ul></div></div><div class="ra-charities"><div class="ra-left-header">Charities</div><div class="ra-left-body"><span class="ra-button-span"><a href="mailto:marketing@novusbio.com?subject=Charity%20Submission%20for%20Microbiology" class="ra-button">Submit a Charity</a></span><div class="clear"></div></div></div><div class="ra-events"><div class="ra-left-header">Events</div><div class="ra-left-body"><p class="ra-events-blurb"><span class="ra-events-image">&nbsp;</span>Submit your event on Microbiology to be featured.</p><span class="ra-button-span"><a href="mailto:marketing@novusbio.com?subject=Event%20Submission%20for%20Microbiology&amp;body%3DEvent%20Name%3A%0ADescription%3A%0ADates%3A%0ATime%3A%0ALocation%3A%0AMore%20information%20URL%3A%0AImage%20%28please%20attach%20any%20relevant%20images%29" class="ra-button">Submit an Event</a></span><div class="clear"></div></div></div> </div> <div class="main grid_12"> <table> <tr> <td> <h1>Microbiology Research Scope</h1> </td> </tr> <tr> <td> <p>Microbiology research encompasses the study of all microscopic entities including unicellular and multicellular life forms, and non-cellular or acellular particles. When microbes form symbiotic relationships with hosts, either both species benefit from the host-microbe interaction, classified as mutualism, or is described as commensalism where only one species benefits. Conversely in parasitism one species, the parasite, benefits at the expense of the other, the host, often resulting in an infection and/or disease.</p> <p>&nbsp;</p> <table width="650px" align="center" cellpadding="6" cellspacing="6"> <tr align="center" bgcolor="#005F9E"> <td align="center" colspan="2"><span style="color: #FFFFFF; font-weight: bold;">Unicellular</span></td> </tr> <tr valign="top" align="center"> <td ><p><img src="https://images.novusbio.com/design/nb-microbiology-bacteria-300px.jpg" alt="Single celled organisms that lack membrane-bound organelles; with pathogenic bacteria causing infections and disease" title="Bacteria or Prokaryotic Microorganisms"><br/> <a href="/research-areas/bacterial-pathogens"><strong>Bacteria</strong></a>- Prokaryotic unicellular forms are defined by their lack of organized membrane-enclosed DNA or nuclei and organelles.</p> </td> <td><p><img src="https://images.novusbio.com/design/nb-microbiology-protozoa-300px.jpg" alt="Types of Protozoa including amoebas are either free living or can cause disease" title="Protozoans, Single-celled Eukaryotes"><br/> <strong>Protozoa</strong>- Eukaryotic unicellular organisms include free living and parasitic forms.</p> </td> </tr> <tr align="center" bgcolor="#005F9E"> <td align="center"><span style="color: #FFFFFF; font-weight: bold;">Unicellular or Multicellular</span></td> <td align="center"><span style="color: #FFFFFF; font-weight: bold;">Acellular</span></td> </tr> <tr align="center" valign="top"> <td><p><img src="https://images.novusbio.com/design/nb-microbiology-fungi-300px.jpg" alt="Eukaryotic microorganisms that include yeast and molds. Thermally dimorphic fungi infect humans and other mammals" title="Fungi Classification"><br/> <strong>Fungi</strong>- Eukaryotic organisms may be unicellular, as exemplified by <a href="/product-type/primary-antibodies?species=Yeast">yeasts</a>, and includes multicellular forms, represented by molds and dimorphic <a href="/product-type/primary-antibodies?species=Fungi">fungi</a>.</p> </td> <td><p><img src="https://images.novusbio.com/design/nb-microbiology-viruses-300px.jpg" alt="Small parasites, having DNA or RNA, capsid, envelope, and membrane proteins; requiring a host to replicate." title="Viruses and Virions"><br/> <a href="/research-areas/microbiology-viral-pathogens"><strong>Viruses</strong></a>- Non-cellular particles consistent of genetic material (DNA or RNA) and proteins. Viruses infect cells of multicellular and unicellular organisms which serve as hosts for their replication.</p> </tr> </table> <br/> <h2>Microbial Diseases</h2> <p>Medical microbiology focuses on pathogenic microbes, which represent about 1% or less of all microorganisms. Microbiology as an area of research is closely intertwined with <a href="/research-areas/immunology/infections-virus-bacteria-and-parasites">immunology</a>, particularly in the study of host-pathogen interactions in infectious diseases. Microbial pathogen structures commonly referred to as pathogen-associated molecular patterns (PAMPs) are first recognized by cells of the <a href="/research-areas/immunology/innate-immunity">innate immune system</a> through a broad range of <a href="/research-areas/immunology/toll-receptors-tlr">pattern recognition receptors</a> (PRRs).</p> <br/> <p align="center"> <a href="/antibody-news/pamps-and-damps-what-is-the-same-and-what-is-different-about-these-molecules" class="link_button">Learn About PAMPs and DAMPs</a> </p> <br/> <h2>Microbial Virulence </h2> <p>Microbial pathogens induce tissue damage by their unique invasive phenotypes and virulence factors. <strong>Bacteria</strong> produce endotoxins (e.g., lipopolysaccharide or <a href="/search?keywords=Lipopolysaccharide&species=Bacteria">LPS</a>) and exotoxins (e.g., <a href="/search?keywords=Clostridium+botulinum">Botulinum toxin</a> and <a href="/search?keywords=Clostridium+Difficile+Toxin+"><em>Clostridium difficile</em> toxin A and B</a>). LPS is a predominant component of the Gram-negative bacterial outer membrane containing a toxic lipid component, Lipid A, which triggers a generalized inflammatory response. In contrast, exotoxins are proteins produced predominantly by Gram-positive bacteria that act upon specific cellular receptors leading to cell damage. </p> <br/> <table cellpadding="6" cellspacing="6"> <tr> <td width="30%"> <p align="right"><img src="https://images.novusbio.com/design/francisella-tularensis-lps-antibody-250px.jpg" alt="Specificity of the F. Tularensis LPS Antibody (FB11) [NB110-7999] was evaluated by testing various bacterial strains and results show that mAb FB11 recognizes the O-antigen moiety of LPS." title="Francisella Tularensisurase LPS Western Blot"></p> </td> <td width="70%"> <p><em>Specificity of </em><a href="/products/francisella-tularensis-lps-antibody-fb11_nb110-7999"><em>Francisella Tularensis LPS Antibody (FB11)&nbsp;[NB110-7999]</em></a><em>. Inactivated F. tularensis SCHU S4 (lane 1), SCHU S4 deltawbtI (lacks O-antigen, lane 2), LVS (lane 3), F. tularensis subsp. holarctica (lane 4), subsp. novicida (lane 5), F. philomiragia (lane 6), purified B. pseudomallei LPS (lane 7) and E. coli LPS (lane 8) were separated on 12% SDS-PAGE gels and blotted onto nitrocellulose membranes. The membranes then were probed with mAb FB11. Image collected and cropped by CiteAb from the following publication (//dx.plos.org/10.1371/journal.pone.0195308), licensed under a CC-BY licence.</em></p> </td> </tr> <tr valign="top"> <td width="30%"> <p align="right"><img src="https://images.novusbio.com/design/clostridium-defficile-toxinB-164px.jpg" alt="Titration of the recombinant toxin B (TcdB) protein detected by Western Blot" title="Clostridium difficile toxin B (TcdB) Western Blot"></p> </td> <td width="70%"> <p><a href="/common-name/clostridium-difficile-toxin-b"><em>Clostridium difficile toxin B (TcdB)</em></a><em> is one of the main exotoxins produced by C. difficile which induces cytotoxicity through the inactivation of GTP binding proteins (Rho, Rac, and Cdc42). Western blot analysis of recombinant </em><a href="/products/recombinant-c-difficile-toxin-b-tcdb-protein-cf_6246-gt"><em>C. difficile Toxin B/TcdB (6246-GT)</em></a><em>. PVDF membrane was probed with 1 µg/mL of </em><a href="/products/toxin-b-tcdb-antibody_af6246"><em>Sheep Polyclonal Antibody to C. difficile Toxin B/TcdB Antigen (AF6246)</em></a><em> followed by </em><a href="/products/igg-antibody_haf016"><em>HRP-conjugated Anti-Sheep IgG Secondary Antibody (HAF016)</em></a><em>. A specific band was detected for Toxin B/TcdB at approximately 75 kDa. </em></p> </td> </tr> </table> <br/> <p><strong>Virus</strong> virulence determinants are encoded by both structural and non-structural proteins. Virulence factors act through different mechanisms to modulate virus-host interactions, including the regulation of viral replication, attachment, cell entry, and transmissibility. Additionally, virulence factors may modulate the host&rsquo;s immune system allowing viruses to remain undetected. This is best exemplified by the immune-modulating factors produced by large DNA viruses such as poxviruses and herpes viruses which either inhibit or mimic host&rsquo;s cytokines, chemokines, and proteases.</p> <p>&nbsp;</p> <table align="center" border="0" cellpadding="4" cellspacing="4" width="700px" title="Virulence Factors Modulating the Immune response"> <tr bgcolor="#005F9E"> <td width="109" > <span style="color: #FFFFFF; font-weight: bold;">Virus </span> </td> <td width="230" > <span style="color: #FFFFFF; font-weight: bold;">Immunomodulating Protein</span> </td> <td width="321" > <span style="color: #FFFFFF; font-weight: bold;">Immune Evasion Mechanism</span> </td> </tr> <tr style="border-bottom-style: solid; border-color:#005f9e; border-width: 1px;" valign="top"> <td> <p>Poxvirus-Variola</p></td> <td> <p>Cytokine response modifier (<a href="/products/recombinant-variola-crmb-protein_4778-cr">CRMB</a>)</p></td> <td> <p>Soluble tumor necrosis factor receptor (TNFR) homologue, binds to chemokines preventing immune cell recruitment.</p></td> </tr> <tr style="border-bottom-style: solid; border-color:#005f9e; border-width: 1px;" valign="top"> <td> <p>Hepatitis C Virus (<a href="/search?keywords=hcv">HCV</a>)</p></td> <td> <p>Nonstructural protein 3 (<a href="/products/hcv-ns3-antibody-1b6_nbp2-80122">NS3</a>)</p></td> <td> <p>Serine protease, targets the mitochondrial antiviral signaling protein (MAVS) to inhibit <a href="/common-name/ifn-beta">IFN-beta</a> production.</p></td> </tr> <tr style="border-bottom-style: solid; border-color:#005f9e; border-width: 1px;" valign="top"> <td> <p>Herpes Simplex Virus (<a href="/search?keywords=herpes+simplex+virus">HSV</a>)</p></td> <td> <p>UL36 ubiquitin-specific protease (UL36USP)</p> <p>ICP34.5<br/> </p> <p>Kinase US3</p> </td> <td> <p>Tegument protein with deubiquitinase activity, inhibits INF-beta production.</p> <p>Inhibits production of IFN thorough <a href="/common-name/tbk1">TBK1</a> sequestration.</p> <p>Serine/threonine kinase, reduces activation of type I IFN.</p> </td> </tr> </table> <br/> <h2>Human Microbiota</h2> <p>The human microbiota is expansive, consisting of trillions of microorganisms inhabiting different organs and tissues throughout our bodies. By definition, the genes associated with the community of microbes (bacteria, virus, fungi and more) inhabiting symbiotically the human body, conform the microbiome. Among human organs, the gastrointestinal tract and gut mucosa represent the most populated niche for microbiota-host interactions. The gastrointestinal tract is primarily populated by <em>Firmicutes</em> and <em>Bacteroidetes </em>species. The microbiota, through interactions with the gut epithelium, is implicated in the regulation of metabolic processes and immune responses. </p> <p>&nbsp;</p> <table cellpadding="6" cellspacing="6" align="center" width="700" title="Microbiota Composition in the Human Gut" > <tr align="center" bgcolor="#005F9E"> <td colspan="3"><span style="color: #FFFFFF; font-weight: bold;">Human Gut Microbiota Composition</span></td> </tr> <tr > <td><p><strong>Predominant phyla</strong><br> <em>Bacteroidetes<br> Firmicutes</em></p> <p><strong>Minor phyla</strong><br> <em>Proteobacteria<br> Verrucomicrobia<br> Actinobacteria<br> Fusobacteria<br> Cyanobacteria </em></p> </td> <td align="center"><img src="https://images.novusbio.com/design/human-gut-microbiota-386px.jpg"></td> <td> <p><strong>Health</strong><br> Development <br> Digestion<br> <a href="/research-areas/immunology/innate-immunity">Immunity</a> <br> <a href="https://www.bio-techne.com/research/metabolism" target="_blank">Metabolism</a></p> <p><strong>Disease</strong><br> <a href="/antibody-news/lipopolysaccharide-from-gut-microbiome-localizes-in-human-atherosclerotic-plaques-and-promotes-tlr4-mediated-oxidative-stress">Atherosclerosis</a> <br> <a href="/diseases/diabetes-mellitus">Diabetes</a> <br> IBD<br> Liver Disease<br> <a href="https://www.bio-techne.com/literature/metabolic-syndrome-signaling" target="_blank">Metabolic Syndrome</a> <br> <a href="/research-areas/neuroscience/neurodegeneration">Neurodegeneration</a> <br> Obesity</p> </td> </tr> <tr> <td colspan="3"><p><em>The human gut microbiota is implicated in the modulation of a wide range of physiological processes including digestion (e.g., processing of indigestible substrates), metabolism (e.g., glucose and lipid homeostasis), immunity (e.g., pathogen exclusion), development (e.g., neuronal, epithelial and immune cells). </em></p></td> </tr> </table> <br/> <p>Microbial activity in the gut generates a wide range of metabolites including indoles, folate, secondary bile acids and neurotransmitters such as serotonin and GABA. Microbiota derived metabolites such as short chain fatty acids (e.g., acetic, propionic and butyric acid), interact with cellular receptors in the gut epithelium inducing the release of peptides involved in glucose metabolism.</p> <p align="center"><img src="https://images.novusbio.com/design/metabolic-syndrome-poster-650px.jpg" alt="A poor diet and/or antibiotic use leads to dysbiosis and results in abnormal metabolite levels, increased LPS, reduced tight junction integrity and short chain fatty acids, interference with glucose homeostasis and causes inflammation." title="Gut Microbiota Dysbiosis"></p> <p><em>Gut microbiota dysbiosis, resulting from poor diet (high-fat and low-fiber) and/or antibiotic use, is associated with abnormal metabolite levels, increased LPS, and decreased tight junction integrity. Reduced tight junction integrity, allows LPS leakage across the gut epithelial barrier, which contributes to chronic inflammation of the liver and adipose tissue. Additionally, dysbiosis is associated with reduced levels of short chain fatty acids, which normally interact with G-protein coupled receptors such as </em><a href="/common-name/ffar3-gpr41"><em>GPR-41</em></a><em> in the gut epithelium to promote the release of glucagon-like peptide-1 (</em><a href="/common-name/glp1"><em>GLP1</em></a><em>). Reduced release of GLP1 by enteroendocrine L cells, disrupts glucose homeostasis and promotes inflammation. <em>Diagram from&nbsp;</em></em><a href="https://www.bio-techne.com/literature/metabolic-syndrome-signaling" target="_blank"><em>Metabolic Syndrome Signaling Poster<strong>&nbsp;</strong></em></a><em>, published in its original form in a collaborative between Dr. Robert H. Lustig, Dr. Alejandro Gugliucci and Bio-Techne Corporation</em></p> <br/> <p align="center"><a href="/antibody-news/category/immunology/virology-bacteria-parasites" class="link_button">Read Our Blogs on Microbiology Topics</a> </p> <br/> <p><strong>Select References</strong></p> <p>A., R., M.J., K., F., V., G.P., T., &amp; M.R., H. (2014). <a href="https://www.tandfonline.com/doi/full/10.1586/14787210.2014.866515" target="_blank">Clostridium difficile infection: Molecular pathogenesis and novel therapeutics</a>. <em>Expert Review of Anti-Infective Therapy</em>. https://doi.org/10.1586/14787210.2014.866515 </p> <p> Alejo, A., Ruiz-Argüello, M. B., Ho, Y., Smith, V. P., Saraiva, M., &amp; Alcami, A. (2006). <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1458686/" target="_blank">A chemokine-binding domain in the tumor necrosis factor receptor from variola (smallpox) virus</a>.&nbsp;<em>Proceedings of the National Academy of Sciences of the United States of America</em>,&nbsp;<em>103</em>(15), 5995–6000. https://doi.org/10.1073/pnas.0510462103 </p> <p> Wang, B., Yao, M., Lv, L., Ling, Z., &amp; Li, L. (2017). <a href="https://www.sciencedirect.com/science/article/pii/S2095809917301492#bib1" target="_blank">The Human Microbiota in Health and Disease</a>. <em>Engineering</em>. https://doi.org/10.1016/J.ENG.2017.01.008</p> <p> Cryan, J. (2018). <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5887610/" target="_blank">37. THE GUT MICROBIOME: A KEY REGULATOR OF NEURODEVELOPMENT AND BEHAVIOUR</a>. <em>Schizophrenia Bulletin</em>. https://doi.org/10.1093/schbul/sby014.152</p> <p> Dabke, K., Hendrick, G., &amp; Devkota, S. (2019). <a href="https://www.jci.org/articles/view/129194" target="_blank">The gut microbiome and metabolic syndrome</a>. <em>Journal of Clinical Investigation</em>. https://doi.org/10.1172/JCI129194</p> <p> Farhana, A., &amp; Khan, Y. S. (2020). <a href="https://www.ncbi.nlm.nih.gov/books/NBK554414/" target="_blank">Biochemistry, Lipopolysaccharide</a>. In <em>StatPearls</em>.</p> <p> Freundt, E. C., &amp; Lenardo, M. J. (2005). <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1308935/" target="_blank">Interfering with interferons: Hepatitis C virus counters innate immunity</a>. <em>Proceedings of the National Academy of Sciences of the United States of America</em>. https://doi.org/10.1073/pnas.0509221102 </p> <p> Mogensen, T. H. (2009). <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2668232/" target="_blank">Pathogen recognition and inflammatory signaling in innate immune defenses</a>. <em>Clinical Microbiology Reviews</em>. https://doi.org/10.1128/CMR.00046-08</p> <p> Su, C., Zhan, G., &amp; Zheng, C. (2016). <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4782282/" target="_blank">Evasion of host antiviral innate immunity by HSV-1, an update</a>.&nbsp;<em>Virology journal</em>,&nbsp;<em>13</em>, 38. https://doi.org/10.1186/s12985-016-0495-5 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4782282/ </p> </td> </tr> </table><div class="ra-product-block"></div> </div> </div> <div id="novus_footer_line"></div> <!-- </div> <div class="container_16" id="novus_footer"> <div id="novus_footer_social" class="grid_16 text_center"> <a href="//www.facebook.com/NovusBiologicals" target="_blank"><span class="sprite_facebook"></span></a> <a href="//twitter.com/novusbio" target="_blank"><span class="sprite_twitter"></span></a> <a href="//plus.google.com/b/114457663504514235763/114457663504514235763/posts" target="_blank"><span class="sprite_gplus"></span></a> <a href="//www.youtube.com/user/NovusBiologicals" target="_blank"><span class="sprite_youtube"></span></a> <a href="//www.linkedin.com/company/novus-biologicals-llc" target="_blank"><span class="sprite_linkedin"></span></a> <a href="//pinterest.com/novusbio/" target="_blank"><span class="sprite_pinterest"></span></a> </div> <div class="grid_16 text_center tableBlue_bar" id="novus_footer_register"> <span>Register with us - submit reviews and earn reward points for product discounts</span> <form action="/user/register" method="POST"> <input type="text" id="novus_footer_register_input" name="novus_footer_register_input"> <button id="novus_footer_register_submit">Submit</button> </form> </div> <div class="grid_11"><a href="/support/customer-service/terms.html">Terms &amp; 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