Escherichia Klebsiella Proteus Enterobacter All are member of Enterobacteriaceae family Rod shape Gram negative Facultative anaerob
Genus Vibrio belong to the family of Vibrionaceae Curve rod shape Gram negative Facultative anaerob One single polar flagel
Escherichia coli Found by Theodor Escherich ( Austrian ) 1882 Bacteria coli commune Normal inhabitant of intestinal human and warm blooded animal By the time proceed it is also in process of adaptation and change
It is used as standard for fecal contamination. Water quality for household purpose. MPN test / Index. Lactose fermenter
Enteropathogenic E coli Infantile diarrhea Attachment to immature intestinal mucosal cells Destruction of mucosal villi Causing diarrhea followed by fever and icteric Fatal infection especially on neglected labor.
Enterotoxigenic E. coli (ETEC) Produced Enterotoxin. Plasmid mediated enterotoxin production. There are 2 kind of Toxins : Lt ( Labile toxin ) St ( Stable toxin)