Pinworm

Natural Habitat

Inhabits the human large intestine (cecum and appendix) and can be found on bedding, clothing, or skin surfaces in the perianal area during the egg-laying phase.

Diet & Feeding

Feeds on intestinal contents, including bacteria and mucosal cell debris inside the human digestive tract.

Behavior Patterns

Nocturnal behavior where gravid females migrate out of the anus to lay eggs on the surrounding skin, causing intense itching. Eggs become infectious within a few hours and are spread via the fecal-oral route.

Risks & Benefits

Risks include enterobiasis (pinworm infection), characterized by perianal itching, restless sleep, and irritability. It is a highly contagious parasite, particularly in children and household settings. There are no known ecological benefits.

Identified on: 2/13/2026