Plesiomonas

A genus of Gram-negative, facultatively anaerobic, chemoorganotropic, rod-shaped, motile bacteria. It possesses the enterobacterial common antigen. This genus is found in fish and other aquatic animals and in some other animals. Associated with diarrhea and occasional opportunistic infection in humans.

- P. shigelloides species that is an enteric pathogen and an etiologic agent of various extraintestinal infections transmitted to humans in contaminated food or water or as a colonizer of various animals. This is the only species in the genus and has also been referred to as Pseudomonas s., Aeromonas s., C57, and Vibrio s.

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Ple·sio·mo·nas (ple″se-o-moґnəs) [Gr. plēsios near + monas unit, from monos single] a genus of gram-negative, facultatively anaerobic bacteria of the family Enterobacteriaceae, consisting of motile, rod-shaped organisms with polar flagella, found in the intestinal tracts of mammals. The type species is P. shigelloiґdes