Pinworm

Natural Habitat

The human large intestine, particularly the cecum and appendix area.

Diet & Feeding

Intestinal contents, bacteria, and cellular debris found in the host's colon.

Behavior Patterns

Adult females migrate to the perianal area at night to deposit eggs, causing intense itching. Eggs are highly infectious and can survive on surfaces for 2-3 weeks.

Risks & Benefits

Risks include perianal itching, sleep disturbance, and secondary skin infections from scratching. They are easily spread within households or institutional settings via the fecal-oral route. There are no known ecological benefits.

Identified on: 3/21/2026