Klebsiella oxytoca is a Gram-negative, rod-shaped bacterium that is closely related to K. pneumoniae, from which it is distinguished by being indole-positive; it also has slightly different growth characteristics in that it is able to grow on melezitose, but not 3-hydroxybutyrate.
K. oxytoca is characterized by negative methyl red, positive VP, positive citrate, urea and TSI gas production, is AA, and negative for TSI sulfide, DNAse, growth on sulfide-indole motility medium and the phenylalanine deaminase test.
It is a diazotroph, able to colonise plant hosts and fix atmospheric nitrogen into a form which the plant can use. Association of K. oxytoca with the barley rhizosphere during an entire vegetative period has been demonstrated. The bacteria adhere strongly to root hairs, and less strongly to the surface of the zone of elongation and root cap mucilage.
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- Högenauer C, Langner C, Beubler E, et al. (December 2006). "Klebsiella oxytoca as a causative organism of antibiotic-associated hemorrhagic colitis". N. Engl. J. Med. 355 (23): 2418–26. doi:10.1056/NEJMoa054765. PMID 17151365.
- Klebsiella oxytoca at the US National Library of Medicine Medical Subject Headings (MeSH)
- Type strain of Klebsiella oxytoca at BacDive - the Bacterial Diversity Metadatabase
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