The pinworm (Genus Enterobius) is a parasitic roundworm of the phylum Nematoda. The best known is the human pinworm, also known as the threadwormEnterobius vermicularis. It is found worldwide and causes the common infection enterobiasis in humans. The adult pinworm male is 1–4 mm in length, while the adult female is 8–13 mm and possess the long, pin-shaped posterior end for which the worm is named.
The pinworm lives in the lower part of the small intestine, and the upper part of the colon. After mating the male dies. The female migrates to the anus, and emerges (usually during the night) to deposit 10000 to 20000 eggs in the perianal area (around the anus).
Once ingested orally the larvae hatch and grow to maturity in 30-45 days.
Enterobiusvermicularis is the most common intestinal parasite of man with the widest geographical distribution specially in the primary care setting regardless of race, socioeconomic or culture circumstances
In this study 9 cases of appendicitis due to Enterobiusvermicularis were assessed.
Budd JS,Armstrong C. Role of Enterobiusvermicularis in etiology of appendicitis.
The possibility of an EnterobiusVermicularis infestation should be considered in a case of unexplained enterocolitis and bowel gangrene.
Enterobiusvermicularis is known to cause eosinophilic enterocolitis.
In the present case jejunal enterocolitis due to EnterobiusVermicularis infestation, which is rarely found in jejunum, is seen associated with jejunal gangrene, showing granulomatous reaction with multinucleate giant cells and phagocytosed ova of Enterobiusvermicularis, which is a rare complication of Enterobiusvermicularis infestation.
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