Klebsiella

Klebsiella

Klebsiella is a <a href="/en/Genus" title="Genus" class="wl">genus</a> of <a href="/en/Gram-negative" title="Gram-negative" class="mw-redirect wl">Gram-negative</a>, <a href="/en/Oxidase_test" title="Oxidase test" class="wl">oxidase-negative</a>, rod-shaped <a href="/en/Bacteria" title="Bacteria" class="wl">bacteria</a> with a prominent <a href="/en/Polysaccharide" title="Polysaccharide" class="wl">polysaccharide</a>-based <a href="/en/Capsule_(microbiology)" title="Capsule (microbiology)" class="mw-redirect wl">capsule</a>.<a href="#cite_note-Sherris-3" style="counter-reset: mw-Ref 3;">[3]</a>

<div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none" about="#mwt1">Genus of gram-negative bacteria</div>

<div class='mobile-collapse'><header class="mobile-collapse-header mobile-collapse-btn">Quick facts: Klebsiella, Scientific classification , Speci... ▼</header> <table class="infobox biota mobile-collapse-element" style="text-align: left; width: 200px; font-size: 100%">
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<th colspan="2" style="text-align: center; background-color: rgb(220,235,245)" class="notheme">Klebsiella</th></tr>
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<td colspan="2" style="text-align: center"><a href="/en/File:Klebsiella-pneumoniae.jpg" class="mw-file-description image media-thumb" data-hash="File:Klebsiella-pneumoniae.jpg"><img loading="lazy"alt="Electromicrograph of &quot;Klebsiella pneumoniae&quot;" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/Klebsiella-pneumoniae.jpg/220px-Klebsiella-pneumoniae.jpg" decoding="async" data-file-width="700" data-file-height="475" data-file-type="bitmap" height="149" width="220" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/27/Klebsiella-pneumoniae.jpg/330px-Klebsiella-pneumoniae.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/27/Klebsiella-pneumoniae.jpg/440px-Klebsiella-pneumoniae.jpg 2x"></a></td></tr>
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<td colspan="2" style="text-align: center; font-size: 88%"><a href="/en/Electromicrograph" title="Electromicrograph" class="mw-redirect wl">Electromicrograph</a> of <a href="/en/Klebsiella_pneumoniae" title="Klebsiella pneumoniae" class="wl">Klebsiella pneumoniae</a></td></tr>


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<th colspan="2" style="min-width:15em; text-align: center; background-color: rgb(220,235,245)" class="notheme"><a href="/en/Taxonomy_(biology)" title="Taxonomy (biology)" class="wl">Scientific classification</a> <a href="/en/Template:Taxonomy/Klebsiella" title="e" class="image wl"><img loading="lazy"alt="e" src="//upload.wikimedia.org/wikipedia/commons/7/74/Red_Pencil_Icon.png" decoding="async" data-file-width="16" data-file-height="16" data-file-type="bitmap" height="16" width="16"></a></th></tr>
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<td>Domain:</td>
<td><a href="/en/Bacteria" title="Bacteria" class="wl">Bacteria</a></td></tr>
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<td>Phylum:</td>
<td><a href="/en/Pseudomonadota" title="Pseudomonadota" class="wl">Pseudomonadota</a></td></tr>
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<td>Class:</td>
<td><a href="/en/Gammaproteobacteria" title="Gammaproteobacteria" class="wl">Gammaproteobacteria</a></td></tr>
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<td>Order:</td>
<td><a href="/en/Enterobacterales" title="Enterobacterales" class="wl">Enterobacterales</a></td></tr>
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<td>Family:</td>
<td><a href="/en/Enterobacteriaceae" title="Enterobacteriaceae" class="wl">Enterobacteriaceae</a></td></tr>
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<td>Genus:</td>
<td><a href="/en/Klebsiella" title="Klebsiella" class="wl">Klebsiella</a> <a href="/en/Vittore_Benedetto_Antonio_Trevisan_de_Saint-Léon" title="Vittore Benedetto Antonio Trevisan de Saint-Léon" class="wl">Trevisan</a> 1885<a href="#cite_note-1" style="counter-reset: mw-Ref 1;">[1]</a></td></tr>



































































































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<th colspan="2" style="text-align: center; background-color: rgb(220,235,245)" class="notheme">Species<a href="#cite_note-2" style="counter-reset: mw-Ref 2;">[2]</a></th></tr>
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<ul><li><a href="/en/Klebsiella_aerogenes" title="Klebsiella aerogenes" class="wl">Klebsiella aerogenes</a> </li>
<li><a href="/en/Klebsiella_granulomatis" title="Klebsiella granulomatis" class="wl">Klebsiella granulomatis</a> </li>
<li>Klebsiella grimontii </li>
<li><a href="/en/Klebsiella_huaxiensis" title="Klebsiella huaxiensis" class="wl">Klebsiella huaxiensis</a> </li>
<li>Klebsiella kielensis </li>
<li><a href="/en/Klebsiella_michiganensis" title="Klebsiella michiganensis" class="wl">Klebsiella michiganensis</a> </li>
<li>Klebsiella milletis </li>
<li><a href="/en/Klebsiella_oxytoca" title="Klebsiella oxytoca" class="wl">Klebsiella oxytoca</a> </li>
<li><a href="/en/Klebsiella_pneumoniae" title="Klebsiella pneumoniae" class="wl">Klebsiella pneumoniae</a> </li>
<li>Klebsiella quasipneumoniae 
<ul><li>subsp. quasipneumoniae </li>
<li>subsp. similipneumoniae </li></ul></li>
<li>Klebsiella quasivariicola </li>
<li>Klebsiella senegalensis </li>
<li>Klebsiella steroids </li>
<li><a href="/en/Klebsiella_variicola" title="Klebsiella variicola" class="wl">Klebsiella variicola</a> </li></ul></td></tr>

















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Klebsiella species are found everywhere in nature. This is thought to be due to distinct sublineages developing specific niche adaptations, with associated biochemical adaptations which make them better suited to a particular environment. They can be found in water, soil, plants, insects and other animals including humans.<a href="#cite_note-Bagley-4" style="counter-reset: mw-Ref 4;">[4]</a><a href="#cite_note-Brisse-5" style="counter-reset: mw-Ref 5;">[5]</a>

Klebsiella is named after German-Swiss microbiologist <a href="/en/Edwin_Klebs" title="Edwin Klebs" class="wl">Edwin Klebs</a> (1834–1913).
Carl Friedlander described Klebsiella bacillus which is why it was termed Friedlander bacillus for many years.
The members of the genus Klebsiella are a part of the human and animal's normal flora in the nose, mouth and intestines. The species of Klebsiella are all gram-negative and usually <a href="/en/Non-motile_bacteria" title="Non-motile bacteria" class="wl">non-motile</a>. They tend to be shorter and thicker when compared to others in the family <a href="/en/Enterobacteriaceae" title="Enterobacteriaceae" class="wl">Enterobacteriaceae</a>. The cells are rods in shape and generally measures 0.3 to 1.5&nbsp;µm wide by 0.5 to 5.0&nbsp;µm long. They can be found singly, in pairs, in chains or linked end to end.
Klebsiella can grow on ordinary lab medium and do not have special growth requirements, like the other members of Enterobacteriaceae. The species are <a href="/en/Aerobic_organism" title="Aerobic organism" class="wl">aerobic</a> but <a href="/en/Facultative_anaerobic_organism" title="Facultative anaerobic organism" class="wl">facultatively anaerobic</a>. Their ideal growth temperature is 35° to 37&nbsp;°C, while their ideal <a href="/en/PH" title="PH" class="wl">pH</a> level is about 7.2.<a href="#cite_note-6" style="counter-reset: mw-Ref 6;">[6]</a>

Klebsiella is a genus of Gram-negative, oxidase-negative, rod-shaped bacteria with a prominent polysaccharide-based capsule. Klebsiella species are found everywhere in nature. This is thought to be due to distinct sublineages developing specific niche adaptations, with associated biochemical adaptations which make them better suited to a particular environment. They can be found in water, soil, plants, insects and other animals including humans. 