The cause of pinworm infection is inadequate hygiene. Eggs are transferred from the anus of an infected person to either their own mouth, re-infecting themselves, or another surface. If somebody else touches that contaminated surface and then touches their mouth, they may have ingested the eggs and can become infected.
Are threadworms common in adults?
Threadworms are small, thin, white, thread-like worms between 2 mm and 13 mm long. They infect human guts (intestines). Worms in children are common but anyone of any age can be affected.
What causes adults to get worms?
You can get infected by: touching objects or surfaces with worm eggs on them – if someone with worms does not wash their hands. touching soil or swallowing water or food with worm eggs in it – mainly a risk in parts of the world without modern toilets or sewage systems.
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