Pinworm

Scientific Name: Enterobius vermicularis

Order & Family: Order Rhabditida, Family Enterobiidae

Size: 2 to 13 millimeters (females are larger than males)

Human gastrointestinal tract, specifically the large intestine and rectum

Nutrients found in the human digestive system and intestinal contents

Female worms migrate from the anus at night to deposit eggs on the surrounding skin, causing intense itching

Causes enterobiasis (pinworm infection), which leads to itching and sleep disturbance; highly contagious through the fecal-oral route

Identified on: 3/16/2026