A Rare Case of Recurrent Fistula in Ano with the Pin Worms in the Fistula Tract

Abstract

Enterobius vermicularis is an obligate parasite residing in the host colon. The route of transmission is
faecooral with the life cycle starting with ingestion of viable eggs, which hatch in ileum and the larvae
maturing in the caecum. The gravid adultworm then migrates to the perianal region where it lays its
eggs. A 35 year old male, farmer by profession came with the complain of pus discharge from opening
over perianal region since last 10 days. Fistulectomy of patient was done two times in last two months
suggestive of recurrent anal fistula. Intraoperatively worm was found in fistula tract accidentally which was
sent for microbiology examination and confirmed as enterobius vermicularis.