Escherichia coli (E. coli) 0157:H7 is a bacterium that can infect people and cause symptoms of bloody diarrhea with abdominal cramps. Persons may experience little or no fever. Although healthy adults typically recover completely from E. coli 0157:H7 a week after exposure, it is important to see a physician immediately if you have symptoms as some people, especially children and the elderly, may develop serious complications leading to kidney damage or even death.