Escherichia coli
This named after Escherich who was the first describe the colon bacillus under the name of Bacterium coli village in 1885. numerous group of E.coli is the recognised as mortal enteric foliage, which is farther subdivided into biotypes and serotypes. A many other species have been described in the rubric but they're of little medical significance and include E.fergusonii,E.hermanii They E.vulneris. These have been insulated rarely from clinical samples.E.coli is a sponger living organism only in the mortal or beast intestine. Voided in feces, it remains feasible in the terrain only for a many days. Discovery of thermotolerantE.coli in drinking water, thus, is taken as substantiation of fecal impurity.
Morphology:
It is a Gram-negative, straight rod measuring 1- 3 umx0.4-0.7 um, arranged independently or in dyads, motile by peritrichate flagella, however numerous strains may benon-motile, Capsules and fimbriae are set up in some malign strains.