An aerobic gram-negative bacillus that grows readily on most microbiological media producing a white colony. It is capable of growth between 4oC and 35oC. It produces a fishy-urinary odor (trimethylalamine). It can be isolated from food, soil, water, plants, insects, and sewage. It is a potential pathogen for insects, animals, and humans and is an important cause of nosocomial (hospital-acquired) infections in humans.