Pinworm infection

The most common helminthic infection in the US.

Although most infected individuals are asymptomatic, perianal itching is the most common clinical presentation.

Diagnosis is made by applying adhesive tape to the perianal area and examining for eggs or adult worms.

Treatment consists of a single dose of an appropriate anthelmintic followed by a repeat dose at 2 weeks.

Pinworm infection is caused by the roundworm Enterobius vermicularis. Infection is largely asymptomatic. The classic clinical presentation is intense perianal itching (pruritus ani) without evidence of systemic inflammation.