Enterobacteriaceae

Enterobacteriaceae
Family: Enterobacteriaceae

Genus: -Esherichia coli
-Klebsiella pneumoniae
Sub sp. :K. pneumoniae , adwardi,
K. pneumoniae atlantae, K.pneumoniae oxytoca,
K. pneumoniae rhinoscleromatis

-Enterobacter, Shigella, Salmonella, Proteus, Serratia and others.
-The Enterobacteriaceae are a large, heterogeneous group of gram-negative rods whose natural habitat is the intestinal tract of humans and animals. The family includes many genera (Escherichia, Shigella, Salmonella, Enterobacter, Klebsiella, Serratia, Proteus, and others)as we mention above, some enteric organisms, eg, Escherichia coli, are part of the normal flora and incidentally cause disease, while others, the salmonellae and shigellae, are regularly pathogenic for humans. The Enterobacteriaceae are facultative anaerobes or aerobes, ferment a wide range of carbohydrates, possess a complex antigenic structure, and produce a variety of toxins and other virulence factors. Enterobacteriaceae, enteric gram-negative rods, and enteric bacteria. but these bacteria may also be called coliforms. General characteristics: G-ve bacilli or coccobacilli, catalse +ve ,oxidase –ve capsulated or non-capsulated ,motile or non –motile , non-spore former , pathogenic for human, animals and plants. intestinal parasite, normal flora , reduce nitrate to nitrite.