Studies on The Role Played By Some Nile Fishes In Transmitting Trematode Worms To Dogs

The present study waS carried out to investigate the role of Nile fishes which act as Becund intermediatehosts of some trematodes to dog~ th~ough consumption of their meat. Samples from 559 fishes were examined,either fresh or after being prepared for the detection of encysted metacercariae. 54.03 % of the fishesexamined harbouredencystedmetacarcariae in their muscles. The fishes examined were Tilapia £E. Bagrus bayad, Syndontis schall and Lates niloticus from the different localities of Nile, They revealed that therate of infestation with encysted metacercariae were 69.57 , 62.71 , 46.26 and zero % respectively. Monthlyprevalence of encysted metaceraria had been noticed among the different species of fishes. The highestprevalence of encysted metacercariae was during Ueptember in case of Tilapia £E. and Bagrus bgyad and in Decemberin Syndontis schall • Also seasonal incidence showed that the rate of infestation of Tilapia with encystedmetacercariae was nearly eqpal during the four seasons of the year. Bagrus bayad showed a high incidenceduring the autumn and in Syndontis schall was during winter.