<unk>  occurs worldwide, and is the most common helminth (i.e., parasitic worm) infection in the United States and Western Europe. In the United States, a study by the Center of Disease Control reported an overall incidence rate of 11.4% among people of all ages.<unk> s are particularly common in children, with prevalence rates in this age group having been reported as high as 61% in India, 50% in England, 39% in Thailand, 37% in Sweden, and 29% in Denmark. Finger sucking has been shown to increase both incidence and relapse rates, and nail biting has been similarly associated. Because it spreads from host to host through contamination, enterobiasis is common among people living in close contact, and tends to occur in all people within a household. The prevalence of<unk> s is not associated with gender, nor with any particular social class, race, or culture.<unk> s are an exception to the tenet that intestinal parasites are uncommon in affluent communities.
Pinworm infection
Hookworm infection
Tick infestation
Soil-transmitted helminthiasis
Intestinal parasite infection
Arthropod bites and stings
Myiasis
Dental plaque