Pinworm
Scientific Name: Enterobius vermicularis
Order & Family: Order: Oxyurida, Family: Oxyuridae
Size: Females are 8-13 mm long and 0.5 mm thick; males are smaller, 2-5 mm.
Natural Habitat
The human gastrointestinal tract, specifically the large intestine and rectum.
Diet & Feeding
Intestinal contents and bacteria found in the human digestive system.
Behavior Patterns
Adult females migrate to the perianal area at night to lay eggs. Eggs become infectious within hours and are spread via the fecal-oral route.
Risks & Benefits
Causes enterobiasis, characterized by intense itching (pruritus ani). It is highly contagious but generally more of a nuisance than a severe medical risk.
Identified on: 5/11/2026