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In healthy people with diarrhea, and who appear well otherwise, the health care professional may elect to do no tests at all. Stool cultures (when a sample of the stool is taken and examined in the lab for certain bacteria or parasites) are not usually necessary unless there is high fever, blood in the stool, recent travel, or prolonged disease.
Medically Reviewed by a Doctor on 11/10/2014
Bhupinder Anand, MD
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