Pinworm

Natural Habitat

The human large intestine; eggs are commonly found on bedding, clothing, and household surfaces.

Diet & Feeding

Intestinal contents and cellular debris within the human host.

Behavior Patterns

At night, female worms migrate out of the anus to deposit eggs on the surrounding skin, causing intense itching. This is a common parasitic infection, especially in children.

Risks & Benefits

Risk: Causes enterobiasis, leading to itching (pruritus ani), disturbed sleep, and irritability. While generally harmless, heavy infestations can cause secondary skin infections. Benefit: None.

Identified on: 3/15/2026