ABSTRACT:
Escherichia coli was among the most common pathogens that causes intestinal and extra-intestinal diseases worldwide. One hundred fifty (150) stool samples were collected from patients suffering from significant diarrhea during the period of October 2017 to the end of December 2017 from three main hospitals in Hilla city, Iraq, about 46 isolates were identified as E.coli. All stool samples were cultured on MacConkey and blood agar plates. E.coli positive cultures were set further serological test by using slide agglutination test with specific antisera. The high prevalence of E.coli serotypes among diarrhea patient in Hilla city was with ETEC that about 16(34.8%). The high prevalence serotypes in ETEC serogroups are the O6: K15.Also subdivided the results of serotypes according to the age and sex factors. We detect the ETEC in age factor are 8 adults and 8 children while according to sex factor were 8 male and 8 female.