A genus of gram-negative, facultatively anaerobic bacteria in the family ENTEROBACTERIACEAE. It is found in FOOD; SOIL; and SEWAGE; and is an opportunistic pathogen of humans.

A family of gram-negative, facultatively anaerobic, rod-shaped bacteria that do not form endospores. Its organisms are distributed worldwide with some being saprophytes and others being plant and animal parasites. Many species are of considerable economic importance due to their pathogenic effects on agriculture and livestock.

An enzyme catalyzing the hydrolysis of penicillin to penicin and a carboxylic acid anion. EC 3.5.1.11.

Infections with bacteria of the family ENTEROBACTERIACEAE.

The terms, expressions, designations, or symbols used in a particular science, discipline, or specialized subject area.

Gram-negative gas-producing rods found in feces of humans and other animals, sewage, soil, water, and dairy products.