Escherichia coli is a gramnegative, rodshaped bacterium normally found in the intestine of poultry and other vertebrates Though many E coli are not pathogenic, some have acquired virulence factors, greatly increasing their pathogenicity , The majority of cases of colibacillosis appear to be due to E coli that have acquired a number of virulence genes clustered together in plasmidborneEscherichia coli is type of bacteria bacteria which causing several disease in poultry Its most common organism in poultry Its found all over places like food, water, soil, dust & intestine of human & animalsThe most susceptible to severe illness from E coli O157H7 are the elderly, the young and those who have weakened immune systems Typically, E coli O157H7 related illnesses occur because the microorganism emits a toxin that can cause hemorrhagic colitis, a disease with symptoms like bloody diarrhea and severe abdominal pain Approximately 10 percent of these cases in children lead to hemolytic ure
