Pinworm

Pinworm, nematode worm parasitic in the intestines of human beings and occurring in most parts of the world (see Roundworm). Pinworm is the most common roundworm infestation in the United States, infecting children more often than adults. It occurs among all economic classes and in urban as well as rural areas. The pinworm is about 1 cm (about 0.4 in) long. Human beings become infected after drinking water or eating food contaminated by the eggs of the pinworm. The adult worm develops in the intestine and lays its eggs in the anal region. Reinfection occurs if the eggs are swallowed. Symptoms of infection, which are usually mild, include itching, intestinal upset or vomiting, and nervousness. Various drugs are used to treat the infection, in addition to stringent hygiene and the disinfecting of eating utensils and bed linens.

Scientific classification: The pinworm belongs to the family Oxyuridae, order Oxyuroidea, phylum Nematoda. It is classified as Enterobius vermicularis.