Analysis of fresh produce showed that enterotoxigenic Escherichia coli (ETEC) strains are most often found in cilantro and parsley, with prevalence rates of approximately 0.3%. Some ETEC strains also carried Shiga toxigenic E. coli (STEC) genes but had no STEC adherence factors, which are essential to cause severe human illness. Most ETEC strains in produce carried stable toxin and/or labile toxin genes but belonged to unremarkable serotypes that have not been reported to have caused human illnesses.
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