E. coli O157:H7 is one of hundreds of strains of the bacterium Escherichia coli. Although most strains are harmless and live in the intestines of healthy humans and animals, this strain produces a powerful toxin and can cause severe illness.
How to lower your risk of infection
For more information about reducing your risk of foodborne illness, visit the US Department of Agriculture’s Food Safety and Inspection Service website or the Partnership for Food Safety Education. For more advice on cooking ground beef, visit the U.S. Department of Agriculture website.