Threadworms (also known as pinworms) are tiny worm parasites which infect the large intestine (gut). Threadworms look like small thin white pieces of thread. This type of infection is common, particularly in young children.

Threadworms can live in the gut for around 6 weeks before dying. The female worms may also lay tiny eggs around the anus, which can result in itching around the anus.

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Authored May 18, 2021 by Joseph Issac, MPharm
Reviewed Jun 15, 2021 by Prabjeet Saundh, MPharm