Pin Worm Infection pinworms enterobiasis https://www.cdc.gov/parasites/pinworm/index.html http://www.cdc.gov/parasites/pinworm/index.html Pin Worm Infection http://www.cdc.gov/parasites/pinworm/index.html Pinworms Pinworms https://www.cdc.gov/parasites/pinworm/index.html CDC: Pinworm infection