Pthiriasis

**Definition:** Infestation most commonly of pubic hair and less commonly of body hair or eyelashes by the crab louse, Pthirus pubis. Transmission is by direct, typically sexual contact with an infected individual. Confirmation is by identification of Pthirus pubis or its eggs.

**Long definition:** Infestation by the crab louse, Pthirus pubis. Crab lice usually infest pubic hairs but may less commonly infest hair in other body locations including the eyelashes.

**Inclusions:** - Infestation by crab lice