Citrobacter freundii

Common card · No. 454780

Citrobacter freundii is a species of facultative anaerobic Gram-negative bacteria of the family Enterobacteriaceae which currently consists of 13 recognized species. These bacteria have a rod shape with a typical length of 1–5 μm. Most C. freundii cells have several flagella used for locomotion, although some non-motile taxa do not. C. freundii is a soil-dwelling microorganism, but can also be found in water, sewage, food, and the intestinal tracts of animals and humans. The genus Citrobacter was first described in 1932 by Werkman and Gillen. Cultures of C. freundii were isolated and identified in the same year from soil extracts and canal water. C. freundii was originally named Bacterium freundii by Braak in 1928 until Werkman and Gillen proposed the current name.

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