E. coli is a type of bacteria that lives in the digestive tracts of humans and animals. There are many types of E. coli, and most of them are harmless. But some can cause a dangerous type of diarrhea. Others can cause a urinary tract infection.
Medical Review:E. Gregory Thompson MD - Internal Medicine & Adam Husney MD - Family Medicine & W. David Colby IV MSc, MD, FRCPC - Infectious Disease