Three Strigeid cercariae from Littorina littorea snail, Qarun Lake, Fayoum, Egypt

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AIM: as a vector for some trematode parasites. MATERIALS AND METHODS: snails were collected during the summer of 2016 from a Qarun lake in the EL-Fayoum Governorate, Egypt. The snails were investigated for infection by trematode parthenitae through induction of cercarial shedding by exposure to light and crushing the snails. The species were stored in Search Laboratory of Zoology Department, Faculty of Science, Fayoum University. RESULTS: type 3. The incidence of infection by these cercariae was 33%, 25.7%, and 2.4%, respectively. CONCLUSION: This study is clarifying the importance of this marine snail as intermediate hosts for new trematode species.

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