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Citrobacter koseri, formerly known as Citrobacter diversus, is a Gram-negative non-spore forming, rod-shaped bacterium. It is a facultative anaerobe capable of aerobic respiration. It is motile via peritrichous flagella. [2] It is a member of the family of Enterobacteriaceae.
The species C. amalonaticus, C. koseri, and C. freundii can use citrate as a sole carbon source. Citrobacter species are differentiated by their ability to convert tryptophan to indole (C. koseri is the only citrobacter to be commonly indole-positive), ferment lactose (C. koseri is a lactose fermentor), and use malonate.
Typical genera include: [3] Citrobacter are peritrichous facultative anaerobic bacilli between 0.6–6 μm in length. [4] Citrobacter species inhabit intestinal flora without causing harm, but can lead to urinary tract infections, bacteremia, brain abscesses, pneumonia, intra abdominal sepsis, meningitis, and joint infections if they are given the opportunity. [4]
Coliform bacteria include genera that originate in feces (e.g. Escherichia, Enterobacter, Klebsiella, Citrobacter). The fecal coliform assay is intended to be an indicator of fecal contamination; more specifically of E. coli which is an indicator microorganism for other pathogens that may be present in feces.
C. freundii is also a nitrogen-fixing bacteria, a process demonstrated in the living tissues of sassafras trees. This process provides evidence that they are partly responsible for reducing nitrate to nitrite in the environment. [8] C. freundii can also be found in the intestinal tracts of humans and other animals from diverse environmental ...
C. rodentium is a non-motile, facultative aerobe that lives in the intestinal tract of mice. The indole production test is negative, and it cannot grow on citrate or KCN.It is negative for arginine dihydrolase (meaning it cannot utilize arginine as a carbon and energy source) and is negative for H 2 S production.
Camels are also hardier animals, able to survive in dry, acrid environments, the study points out, citing “the suitability of camel farming in climates that are unfavourable for traditional ...
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