Detection of E.coli O157:H7 Strain Among Bacteria Contaminated Drinking Water in Nineveh Province

This research, was dealt with the isolation and identification of bacteria caused contamination in drinking water, and detection on the virulent pathogen E. coli O157: H7 strain in contaminated drinking water samples, the results indicated that most isolated bacteria belong to Enterobacteriaceae and the higher percent was E. coli (%32) , in addition to other bacteria ,found among there were Enterobacter cleacae (%19.3), E. sakazakii (%5.9), Citrobacter braakii (%8.8), Citrobacter freundii (%3.0), Proteus mirabilis (%7.4), Shigella sonni (%0.7), Salmonella (%5.2), Serratia plymuthica (%1.5), pseudomonae aeruginosa (%5.2) and Enterococcus faecalis (%10.4) .
E. coli serotypes were diagnosed in drinking water samples, to detect O157: H7 strain the result showed that (47.7 %) from all E. coli strains and (%15.6) from all other bacteria, while O157 strain formed (%22.7) percent and (%7.40) were most bacteria Isolated from drink water.