If the infection is heavy, symptoms may also include loss of appetite, restlessness, and difficulty sleeping. Symptoms are caused by the female pinworm laying her eggs. Pinworm is the most common worm infection in the United States. School-age children, followed by preschoolers, have the highest rates of infection. Infection often occurs in more than one family member.
Adults are less likely to have pinworm infection, except mothers of infected children.
Child care centers, and other institutional settings often have cases of pinworm infection. Pinworm eggs are infective within a few hours after being deposited on the skin. They can survive up to 2 weeks on clothing, bedding, or other objects. The eggs become glued to the sticky tape or paddle and are identified by examination under a microscope. Because bathing or having a bowel movement may remove eggs, the test should be done as soon as you wake up in the morning.