A person will remain infectious for as long as there are worms laying eggs on the skin around his or her rectum. Pinworm eggs can remain infectious in an indoor environment for two to three weeks.
Can pinworms last for years?
Sometimes, eggs on the anus can hatch and the pinworm larvae can reinfect the intestine that they came from. This can cause an infection to continue indefinitely if it's not treated.
How long do pinworms last if left untreated?
How long does pinworms last? The life cycle of a pinworm is 4 to 6 weeks. Without treatment, infestation will continue as long as fresh eggs are being swallowed, unless a person develops immunity to pinworms, which is unusual before age 15.
How long does it take for pinworms to infect?
Pinworm eggs become infective within a few hours after being deposited on the skin around the anus and can survive for 2 to 3 weeks on clothing, bedding, or other objects.
How long can pinworms grow?
They then move through the rectum to the lower intestine, where they grow to adult size within two to six weeks. Pinworm infections can be spread as long as either worms or eggs are present.
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