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String testDefinitionA 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 NamesDuodenal parasites testHow the Test is PerformedYou 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 TestFood and fluid may be restricted for 12 hours before the test. How the Test Will FeelYou may find it difficult to swallow the string, and you may feel an urge to vomit when the string is pulled up. Why the Test is PerformedThe test is performed when there is a suspicion of parasitic infestation but parasites are not detected by stool examination. Normal ResultsNo presence of blood, parasites, fungus, abnormal cells, or bile is normal. What Abnormal Results MeanAbnormal results may indicate the presence of giardia or another parasitic infestation. ConsiderationsPrevious drug treatment can affect the test results.
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. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997-
A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.  |
