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Pinworm test


Definition:

A pinworm test is a method used to identify a pinworm infection. Pinworms are small, thin worms that commonly infect young children, although anyone can be infected.

Alternative Names:

Oxyuriasis test; Enterobiasis test; Tape test

How the Test is Performed:

Adult pinworms live in the intestine and colon. At night, the female adult worms deposit their eggs outside the rectum or anal area.

One way to diagnose pinworms is to shine a flashlight on the anal area. The worms are tiny, white, and threadlike. If none are seen, check for two or three additional nights.

The best way to diagnose this infection is to do a tape test. The best time to do this is in the morning before bathing, because pinworms lay their eggs at night. Firmly press the sticky side of a 1-inch strip of cellophane tape over the anal area for a few seconds. The eggs stick to the tape. The tape is then transferred to a glass slide, sticky side down. Your health care provider needs to examine the slide to confirm that there are eggs.

The tape test may need to be done on three separate days to improve the chances of detecting the eggs.

How to Prepare for the Test:

No special preparation is necessary.

How the Test will Feel:

This test is usually well tolerated. The skin may have minor irritation.

Why the Test is Performed:

This test is performed to check for pinworms, which are a potential cause of itching in the anal area.

What Abnormal Results Mean:

If any adult pinworms or eggs are found, the person has a pinworm infection.

Risks:

There are no risks.

Considerations:

Consult your health care provider for treatment. Usually the whole family is treated, because the pinworms are easily passed back and forth between family members.

References:

Dent AE, Kazura JW. Enterobiasis (Enterobius Vermicularis). In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 286.


Review Date: 8/14/2012
Reviewed By: Linda J. Vorvick, MD, Medical Director and Director of Didactic Curriculum, MEDEX Northwest Division of Physician Assistant Studies, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician 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. Copyright 2002 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.

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