E. coli O157 Test · Stool

E. coli O157 is best known for its association with enterohemorrhagic E. coli outbreaks linked to undercooked beef and contaminated produce. On its own, this marker does not confirm toxin production or disease severity. Its significance increases when detected alongside Shiga toxin genes, which greatly raise the risk of complications. These infections can cause bloody diarrhea and systemic illness in susceptible individuals. Careful interpretation is essential to avoid unnecessary antibiotic use.