Pinworm infection



Pinworm

Original Article:  http://www.mayoclinic.com/health/medical/IM01003
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Pinworm

Illustration of pinworm

An adult pinworm generally is 1/4 inch to 1/2 inch (5 to 13 millimeters) in length. The most common symptom of infection is anal itching, particularly at night, as worms migrate to the host's anal area to lay their eggs.
IM01003

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