Perform a rectal exam to find out whether you have
blood in your stool.
Doctors who suspect E. coli
infection will order a type of
stool culture that detects strains of E. coli. Because the bacteria can leave the body in only a few
days, the sample should be obtained as soon as possible after symptoms
Other tests are sometimes used when the diagnosis is
unclear, but these are not yet widely available.
If a child or
older adult is diagnosed with E. coli infection, he or
she may be watched for development of
severe blood or kidney problems. Monitoring requires
blood and urine tests to measure essential elements of blood and body