Atlas of Gastrointestinal Endoscopy by A. Freytag, T. Deist and M. Kutscha - colon, parasites Parasites Enterobius vermicularis , pinworm. Infection occurrs after ingestion of eggs. In the cecum the worm develops from a larva after 1 month. The female worm carries the eggs to the perianal region at night. For diagnosis eggs are obtained by cellotape and readily visible under a microscope.
Symptoms are perianal itching at night.
Most affected individuals are children. Continous self- infection can be resonsible for chronic disease.