What is Escherichia coli, or E. coli?
E. coli are common, normally benign intestinal bacteria found in humans and animals, but the O157:H7 strain produces a powerful toxin that can cause bloody diarrhea, abdominal cramps and in some cases death. The O157 bacteria is virulent and tough and only a few are needed to cause illness. Q: How is E. coli O157:H7 spread? A: The O157 strain is not naturally present in humans, but does occur in cattle. Infected animals can spread the bacteria through their feces, which can wind up on beef during the butchering process. Eating undercooked ground beef causes most E. coli-related illnesses. Feces-contaminated water, vegetables and fruit, as well as unpasteurized milk or juice, can also cause infection. Q: What illness does E. coli O157:H7 cause? A: The O157 strain can cause bloody diarrhea and dehydration. The very young, seniors and people with weak immune systems are the most vulnerable. In children, O157 may lead to a severe, sometimes fatal kidney disease called HUS (hemolytic-uremic
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