Pinworm

Natural Habitat

Human large intestine and rectum; eggs are often found on clothing, bedding, and around the perianal area

Diet & Feeding

Intestinal contents and epithelial cells

Behavior Patterns

Nocturnal migration where females leave the anus to lay eggs on the surrounding skin, causing intense itching

Risks & Benefits

Strictly a parasite; causes enterobiasis, resulting in itching, restless sleep, and irritability, but generally does not cause serious medical harm

Identified on: 12/30/2025