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Citrobacter sedlakii

Species of bacterium From Wikipedia, the free encyclopedia

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Citrobacter sedlakii is a species of Gram-negative bacteria.[1] It has been described as causing human disease, but is generally found as a non-pathogenic organism in human stools.

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History

Citrobacter sedlakii was originally isolated from human stool and wounds as strains of Citrobacter freundii.[1] However, in 1993 six strains of C. freundii were identified as a separate species based on DNA hybridization, and were named C. sedlakii to honor Czech microbiologist Jiri Sedlak.[1]

Description

Citrobacter sedlakii is a rod-shaped gram-negative bacterium. It can be distinguished from other Citrobacter species by its ability to produce indole, arginine dihydrolase activity, and ornithine decarboxylase activity.[1]

Role in disease

Citrobacter sedlakii was originally isolated from human stool and wounds and was suggested to be pathogenic in humans.[1] While some reports have described C. sedlakii as causing illness in humans, it is frequently found in stool and is not thought to be pathogenic in most cases.[2] C. sedlakii can express the O157 antigen which is commonly found on pathogenic E. coli, however this does not cause disease.[3]

References

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