1) Human infection with pinworms 
Small nematode, Enterobius vermicularis, that is responsible for intestinal infection in humans. It appears as a small thread-like worm approximately 3-5mm in length. ... Common symptoms include anal itching that is worse at night when the female worm migrates to the anus to lay its eggs. Thin, white, thread-like worms may be visible at the anal op...
(ok″se-u-ri´ә-sis) infection with oxyurids such as Enterobius vermicularis. enterobiasis.
human infection with pinworms.