A study on Entrobius vermicularis infection in a appendices removed by surgery in Tabriz hospitals

Abstract

The association of Enterobius vermicularis infestation with acute appendicitis varies from 0.2-41.8% worldwide. Our purpose was to determine the signiOcance of Enterobius-associated appendicitis by retrospective review of appendectomies performed dur-ing a 8-year period at a major Tabriz hospital. The Surgical Pathology database at Imam Khomeini's and Alinasab's Hospital, Tabriz,Iran was reviewed for appendiceal speci-mens found to have Enterobius infestation. Corre-sponding patient charts were evaluated for age, gender, presenting symptom s, laboratory data, operative und-ings, and clinical course. Of the 5981 appendectomies performed from 1996 to 2004, 38 specimens (1.38%) were found to contain Enterobius vermicularis. Twentysix of the appendectomies were per-formed for symptoms of acute appendicitis; the remaining twelve were incidental appendectornies in con-junction with other operations. Between that age groups, and between two age groups of 5-10 and 11-16 the highest rate has been shown that among them females infection is more. In 38 cases there are pinworm that %67 present of it relates to females and %33 of it relates to males. Of the 26 symptomatic children, 12 presented with fever > 99.0 degrees F, and 14 had a WBC count > 10,000. Intra-operative appearance of the appendix ranged from normal to perforation. Pathologic evaluation showed neutrophil or eosinophil inriltration in 27 of the 38 specimens. Enterobius infestation is an uncommon cause of acute appendicitis in children in the Islamic Republic of Iran. It may be associated with acute appendicitis, "chronic appendicitis," ruptured appendicitis, or with no significant clinical symptoms.