Plesiomonas shigelloides is a Gram-negative, rod-shaped bacterium which has been isolated from freshwater, freshwater fish, and shellfish and from many types of animals including cattle, goats, swine, cats, dogs, monkeys, vultures, snakes, and toads.

It has been associated with causing human disease, but this has not yet been proven. It is placed among the Enterobacteriaceae.

Enterobacteria