A species of gram-negative, facultatively anaerobic, rod-shaped bacteria found in humans and other animals including MAMMALS; BIRDS; REPTILES; and AMPHIBIANS. It has also been isolated from SOIL and WATER as well as from clinical specimens such as URINE; THROAT; SPUTUM; BLOOD; and wound swabs as an opportunistic pathogen.

Synonyms: Citrobacter ballerupensis, txid546, Bacterium freundii, Salmonella ballerup, Salmonella hormaechei, Escherichia freundii, Citrobacter freundii