Pinworm

Natural Habitat

Human gastrointestinal tract, primarily the large intestine and rectum; eggs are often found on skin, clothing, or bedding.

Diet & Feeding

Absorbs nutrients from the semi-digested food and debris within the human host's intestine.

Behavior Patterns

Nocturnal migration; gravid females travel to the perianal area at night to deposit eggs, causing itching which facilitates egg dispersal through scratching.

Risks & Benefits

Risk: Causes Enterobiasis, characterized by intense rectal itching, irritability, and sleeplessness. Generally not life-threatening but highly contagious within households.

Identified on: 3/25/2026