| Species/Subspecies: | Klebsiella oxytoca | ||||||||
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| Etymology: | Genus name: named after the German bacteriologist Edwin Klebs (1834-1913). Species epithet: acid-producing. | ||||||||
| Significance: | Has a certain importance in food hygiene [Of minor importance] |
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| Taxonomy: | Class Gammaproteobacteria Order Enterobacterales Family Enterobacteriaceae Genus Klebsiella |
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| Type Strain: | ATCC 13182= CCUG 15717 | ||||||||
| Macromorphology (smell):
| Form medium sized, dome shaped, white and glistening colonies (2-3 mm i diameter). Ger ej hemolys på blodagar. | ||||||||
| Micromorphology: | Nonmotile rods (0.3-1.0 x 0.6-6.0 µm), which appear singly, in pairs or in short chains. | ||||||||
| Gram +/Gram -: | G- | ||||||||
| Metabolism: | Facultatively anaerobic | ||||||||
| Catalase/Oxidase: | +/- | ||||||||
| Other Enzymes: | DNase -, esculinase +, tryptophanase + (= indole +), urease +. | ||||||||
| Biochemical Tests: | Citrate +, hydrogene sulfide -, methyl red (-), ornithine decarboxylase -, Voges-Proskauer + | ||||||||
| Fermentation of carbohydrates: | D-glucose + lactose + maltose + L-rhamnose + sucrose + L-arabinose + cellobiose + D-mannitol + salicin + trehalose + glycerol + inulin ? raffinose + D-sorbitol + starch ? |
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| Spec. Char.: | |||||||||
| Disease: | Diarrhea, bacteremia and mastitis in cattle. |
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| Hosts: | Is an opportunist, which may be found in the intestinal tract of animals and humans. | ||||||||
| Clinical Picture: | |||||||||
| Virulence Factors: | A low molecular weight cytotoxin, which is called tilivalline. | ||||||||
| 16S rRNA Seq.: |
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| Taxonomy/phylogeny:
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Within genus Klebsiella 13 species have been described. K. oxytoca belongs to the family Enterobacteriaceae and is closely related to members of the genus Citrobacter. In fact, members of the genus Klebsiella and Citrobacter freundii form a monophyletic cluster (see Fig. 156:6 to the left). | ||||||||
| Updated: | 2023-03-29 |