Small bowel tissue smear is a lab test that checks for disease in a sample of tissue from the small intestine.
A sample of tissue from the small intestine is removed during a procedure called esophagogastroduodenoscopy (EGD).
The sample is sent to a laboratory. There it is sliced, stained, and placed on a microscope slide to be examined.
You will need to have an EGD procedure for the sample to be taken. Prepare for this procedure in the way your doctor recommends.
You are not involved in the test once the sample is taken.
Your health care provider may order this test to look for an infection or other disease of the small intestine. In most cases, this test is done only when a diagnosis could not be made using stool and blood tests.
A normal result means that there were no indicators of disease when the sample was examined under the microscope.
The small intestine normally contains certain healthy bacteria and yeast. Their presence is not a sign of disease.
Normal value ranges may vary slightly among different laboratories. Talk to your health care provider about the meaning of your specific test results.
An abnormal result means that certain microorganisms, such as the parasites Giardia or Strongyloides were seen in the tissue sample. It may also mean that there were changes in the structure (anatomy) of the tissue.
There are no risks associated with a laboratory culture.
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Updated by: Jenifer K. Lehrer, MD, Department of Gastroenterology, Frankford-Torresdale Hospital, Aria Health System, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.
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