Pinworm

Scientific Name: Enterobius vermicularis

Order & Family: Order: Oxyurida; Family: Oxyuridae

Size: 2 to 13 mm in length (females are larger than males)

The human large intestine specifically the colon and rectum

Invasive parasites that feed on the contents of the human gut and cellular debris

Nocturnal activity where gravid females migrate to the perianal area at night to deposit eggs; eggs are infectious within hours

Risk of enterobiasis, characterized by intense perianal itching, sleep disturbance, and irritability; highly contagious through the fecal-oral route

Identified on: 1/6/2026