Pinworm
Scientific Name: Enterobius vermicularis
Order & Family: Order: Oxyurida, Family: Oxyuridae
Size: Females: 8-13 mm long; Males: 2-5 mm long
Natural Habitat
The human large intestine (specifically the cecum and appendix)
Diet & Feeding
Content of the human intestinal tract and potentially mucosal cells/secretions
Behavior Patterns
Nocturnal migration: Gravid females travel from the colon to the perianal area at night to deposit eggs, causing intense itching. Eggs become infectious within hours.
Risks & Benefits
Risk: Causes Enterobiasis (pinworm infection), characterized by perianal itching and sleeplessness. Highly contagious within households. Benefit: None.
Identified on: 3/26/2026