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Shiga toxin-producing E. coli (STEC) are diarrhea-causing strains of a group of bacteria called Escherichia coli. E. coli O157:H7 is the most well-known type of STEC, but there are many other types that can cause illness in humans. While STEC infection has traditionally been associated with animal products, outbreaks associated with produce have become more common.


