ABSTRACT
This study was carried out in Shershemah and El-Mossadah Villages, Sharkia Governorate, to determine: the prevalence of human fascioliasis, the heaviness of lymnaea cailliaudi snail canal infestation and the rate of snail infection with Fasciola cercaria. The prevalence of human fascioliasis is found to be 0.5% [10 cases out of 1964] in Shershemah and 1.8% [17 cases out of 944] in El-Mossadah. Lymnaea snails population was found to be more in the water canals than in the main water branches, with rates of cercarial infection of 46% in Shershemah and 26% in El-Mossadah. From this study, it can be concluded that lack of health education and environmental factors that can affect snail population and the organic pollution of water used for irrigation, are possible explanations for the difference in rates of human fascioliasis infection between the two villages