Testing & Diagnosis for Diarrhea in Children

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Contact the Division of Gastroenterology, Hepatology and Nutrition

How is diarrhea in children diagnosed?

In addition to a complete medical history, physical examination and laboratory tests for blood and urine, the child's health care provider may request:

  • Stool culture to check for the presence of abnormal bacteria in the digestive tract that may cause diarrhea and other problems. A small sample of stool is collected and sent to a laboratory by your health care provider's office. In two or three days, the test will show whether abnormal bacteria are present.
  • Blood tests to rule out certain diseases
  • Imaging tests to rule out structural abnormalities
  • Tests to identify food intolerance or allergies
  • Sigmoidoscopy, a diagnostic procedure that allows the health care provider to examine the inside of a portion of the large intestine, and is helpful in identifying the causes of diarrhea, abdominal pain, constipation, abnormal growths and bleeding. A short, flexible, lighted tube, called a sigmoidoscope, is inserted into the intestine through the rectum. The scope blows air into the intestine to inflate it and make viewing the inside easier.

We are grateful to have been ranked #1 on U.S. News & World Report's list of the best children's hospitals in the nation for the third year in a row, an honor we could not have achieved without the patients and families who inspire us to do our very best for them. Thanks to you, Boston Children's is a place where we can write the greatest children's stories ever told.”
- Sandra L. Fenwick, President and CEO

Boston Children's Hospital 300 Longwood Avenue, Boston, MA 02115 617-355-6000 | 800-355-7944

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