Pinworm eggs
Pinworm eggs
Pinworm, close-up of the head
Pinworm, close-up of the head
Pinworms
Pinworms

Pinworm test

Definition:
A test to detect the presence of pinworms. Pinworms are small, thin worms that commonly infest small children, although anyone can be infested. The adult pinworms live in the intestine and colon, and at night the female adult worms deposit their eggs outside the rectum or anal area.

Alternative Names:
Test for oxyuriasis; Test for enterobiasis; Tape test

How the test is performed:

At night use a flashlight to inspect the anal area. The worms are tiny, white, and threadlike. If none are seen, check for 2 or 3 additional nights.

The best way to diagnose this infection is to do a tape test. The best time to collect a sample is in the morning before bathing because the eggs are laid at night. The sticky side of a 1 inch strip of cellophane tape is pressed firmly 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. The slide should then be examined by your medical provider to look for eggs.

To improve the chances of picking up the eggs, this test may need to be done on three separate days.



How to prepare for the test:
Adults:
No special preparation is necessary.

Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experiences, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:

How the test will feel:
This test is usually well-tolerated. Local irritation could occur if you or your child have an allergy to tape.

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

Normal Values:
Absence of pinworm eggs is the normal finding.

What abnormal results mean:
If the adult pinworm or eggs are found you have a pinworm infection.

What the risks are:
There are no risks.

Special considerations:
Consult your medical provider for treatment. Usually the whole family is treated, because the pinworms are easily passed back and forth between family members.


Review Date: 8/18/2001
Reviewed By: Rocio Hurtado, M.D., Infectious Diseases Division, Massachusetts General Hospital and Brigham and Women's Hospital, Boston, MA. Review provided by VeriMed Healthcare Network.

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