Pinworm

The human large intestine; they are obligate parasites found globally.

Pre-digested material, bacteria, and epithelial cells within the human intestine.

Nocturnal migration where gravid females travel from the colon to the anus to deposit eggs on the perianal skin, causing itching.

Causes enterobiasis, characterized by intense anal itching and sleep disruption. Highly contagious within households through ingestion of eggs.