الفهرس 
AcknowledgementOnly 14 pages are availabe for public view
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Abstract
This work aims at studying the prevalence of fascioli asis in Abis I village, Behera province, among humans and livestock. Also, studying Fasciola infection among the intermediate host ( Lymnaea species) in water channels surrounding the village, and investigating some local ecol ogical factors which may favour the distribution of Lyml/.aea snail s . A ten percent systematic sample from the houses was selected including humans and livestock. from 671 human samples, 6 persons only were found infected with Fasciola ( 0.9 ), 5 females ( 1.4 ) and one male ( 0.3 ). Infected cases were illi trate, working in agriculture, living in close contact with animals and used to eat fresh vegetables. from 248 livestock samples, 116 ( 46.9 ) were found infected with Fascio!..C!. The percentage of infection was highest among buffalo es 51.1 and was 10we3t among sheep 2596 . Infection among cattle and buffaloes was more in animals above 6 months of age. from 10304 snails collected from both canals and drains 5.2 were Lymnaea. In this work more Lymnaea were collected from the canals than from the drains. Also infection was more in the large sized snails than the small sized one. The percentage of collected snails was highest in spring followed by winter, then autumn and was the least in summer. As regards ecological factors in Abis I, twelve kinds of aquatic vegetations were recorded in water channels. The me~ pH in canals was 8.2, in drains was 8.4. The mean chloride value in canals was 54.7 mg/L. while’ in drains was 1323.7 mg/L. The mean temperature of canals was 20.3 °c, while in drains was 19.6 °C. The most favourable temperature for 0 the Lymnaea snails is more or less 20 C. Also, it can be stated that temperature is the most important ecological factor for the Lymnaea snails than pH or chloride values..