Morphological and Biological studies on The Enteric Helminthes Infesting Some of The Egyptian Nile Fishes Part -icularly Polyonchobothrium Clarias of The Karmotes clarias. Lazera And Clarias Anguillaris

Six species of tQe Egyptian Nile fishes have been investigated for enteric helminth infestation.” Indeed, the present study revealed that the handledfishes appeared to be natural hosts to tvventy three species of worms which has been clarified as ten trematodes, six cestodes and seven nematodes. The formers were indentified as Acanthostomum spiniceps and Acanthostomum absconditum (in the mean rate of rate of 92.4% of the previous fish but with maxi.mum infestation during June”~· Basidiodiscus ectorchis (”7ith a mean rate of 89.83% of Synodontis schall. maximally observedin.May & June). Sandonia sudanensis reaching a mean rate of 96.61% of the same fish and during the same interval.Bucephalus pOlYffiorphus (witn a mean rate of 3.2% of Ansuilla vu~garip only daring November), Deropristisinflata reaching a mean rate of 57 ~ll% of the same fish bu·c during February and October while Nicolla ~llica also of Anguilla vulgaris at a mean r-atre of 31.75% during Apriland October. The obtained cestodes were Polyoncnobothrium clariaswith a mean rate of 41% of clarias lazera, during April and May~ Proteocephalus dinotopteri reaching a me~D rate of 1% during the same period. Wenyonia viriliswith a mean