Carter had hoped to outlive the worm, which while rarely fatal, causes great pain and suffering to those infected. The Carters also nurtured a forty-year relationship with the nonprofit Habitat ...

Pinworms are small, thin, pin-shaped worms that sometimes live in the human colon and rectum. They're also called threadworms. They're about 1/4- to 1/2-inch long — about the size of a staple.