A string test involves swallowing a string to obtain a sample, which is then tested to detect the presence of intestinal parasites. The string test is rarely performed in the U.S.
Alternative Names:
Duodenal parasites test
How the test is performed:
You swallow a string with a weighted gelatin capsule on the end and then it is pulled back out after 4 hours. Any bile, blood, or mucus attached to the string is examined under the microscope for cell types and parts of parasites or eggs.
How to prepare for the test:
Food and fluid may be restricted for 12 hours before the test.
How the test will feel:
You may find it difficult to swallow the string, and you may feel an urge to vomit when the string is pulled up.
Review Date: 1/22/2007
Reviewed By: Jenifer K. Lehrer, MD, Department of Gastroenterology, Frankford-Torresdale Hospital, Jefferson Health System, Philadelphia, PA. Review provided by VeriMed Healthcare Network.
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