Parasitic stool examination for pinworm (Oxyuris vermicularis) detection

Why This Test Is Done

Your healthcare provider may recommend this test if you or a family member experience persistent itching around the anus, especially at night, or if you have symptoms like stomach pain, diarrhea, or sleep disturbances. Pinworms are common in children and can spread easily through close contact or contaminated surfaces.

What to Expect Before the Test

No special preparation is needed, but you may be asked to collect a fresh stool sample in the morning. Wear loose clothing to the test site to make itching more noticeable if pinworms are present.

How the Test Works

A trained technician examines a small sample of your stool under a microscope to look for pinworm eggs or live worms. If pinworms are found, they may also perform a tape test (applying adhesive tape to the anus) to confirm the diagnosis.

Possible Results and Next Steps

If pinworm eggs or worms are found, you’ll need treatment with prescription medication to kill the worms. Follow-up tests may be done to ensure the infection is fully cleared. If the test is negative but symptoms persist, other causes of itching or digestive issues should be checked.