How Do Pinworms Spread?
Pinworms spread through a fecal-oral route of transmission. This refers to infectious agents in the GI tract passing from one person to another via contaminated objects and lack of proper hygiene (hand washing after using the restroom). People are newly infected by ingesting pinworm eggs that may be on countertops, shared food, bedding, clothing, and other objects. Children may ingest pinworm eggs by sucking on their fingers or thumbs. Pinworm eggs may also become airborne, inhaled, and swallowed, resulting in infection.
It is a common misconception that people can get pinworms from the family dog. While pet dogs and cats can harbor many types of parasites that can infect people, humans are the only host for pinworms.