E. coli<unk> :H7 infection often causes severe, acute hemorrhagic diarrhea (although nonhemorrhagic diarrhea is also possible) and abdominal cramps. Usually little or no fever is present, and the illness resolves in 5 to 10 days. It can also sometimes be asymptomatic. In some people, particularly children under five years of age, persons whose immunologies are otherwise compromised, and the elderly, the infection can cause hemolytic uremic syndrome (HUS), in which the red blood cells are destroyed and the kidneys fail. About 2–7% of infections lead to this complication. In the United States, HUS is the principal cause of acute kidney failure in children, and most cases of HUS are caused by E. coli<unk> :H7.
Escherichia coli O157:H7
Escherichia coli O104:H4
Escherichia coli O121
Escherichia coli O104:H21
Campylobacter upsaliensis
Enteroaggregative Escherichia coli
Salmonella
Vibrio cholerae