Abstract: A study was carried out to identify the intestinal nematode transmitted by Cyclorrhaphan files in a market environment. Three cyclorrhaphan species were identifies namely, Musca domestica, Musca sorbens, Chrysomya megacephala. Like wise, three nematode species eggs (Ascaris lumbricoides, Trichuris trichiura and Ancyclostoma duodenale) were isolated from the gut and surface of flies. Ascaris lumbricoides occurred more in and on all the flies Chrysomya megacephala recorded the highest prevalence of all the helminth eggs present. On gut content, Chrysomya megacephala recorded the highest number of the different helminth eggs isolated. Interestingly there was no correlation between the occurrence of the helminth eggs species and the three cyclorrhaphan flies identified.