- Enteric aerobic Gram-negative bacilli [Fig 1], a normal part of gut flora.
- Can be mistakenly identified as Salmonella; colonies on plates [Fig 2] resemble E. coli.
- Species associated w/ infection most commonly C. freundii, C. amalonaticus and C. koseri (previously known as C. diversus).
- C. braakii, a member of the C. freundii complex, is described as causing infection, mainly in immunocompromised patients.
- Commonly found in soil, water, foodstuffs and normal inhabitant of gut flora in humans and animals.
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Last updated: April 3, 2021
Auwaerter, Paul. "Citrobacter Species." Johns Hopkins ABX Guide, The Johns Hopkins University, 2021. Johns Hopkins Guides, www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540129/all/Citrobacter_species.
Auwaerter P. Citrobacter species. Johns Hopkins ABX Guide. The Johns Hopkins University; 2021. https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540129/all/Citrobacter_species. Accessed December 6, 2023.
Auwaerter, P. (2021). Citrobacter species. In Johns Hopkins ABX Guide. The Johns Hopkins University. https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540129/all/Citrobacter_species
Auwaerter P. Citrobacter Species [Internet]. In: Johns Hopkins ABX Guide. The Johns Hopkins University; 2021. [cited 2023 December 06]. Available from: https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540129/all/Citrobacter_species.
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