EXPERIMENTAL TRANSMISSION AND PATHOGENICITY OF SOME ZOOSPORIC FUNGI TO TILAPIA FISH

Seventeen fungal species belong to six genera were recovered from the four organs of Tilapia fish and the most common were Saprolegniaferax, S. diclina, Achlya dubia, A. americana, A. racemosa and A. flagellata , Dictyuchus sterile, Pythium undulatum and Aphanomyces sp. Severe inf ection followed by death of all fish was incited by S. parasitica and S. felax through experiment I. 30-70% of T. nilotica and T. galileae w ere killed through experiment II by S. parasitica and S. ferax. T. gal ileae was more susceptible to fungal infection than T. nilotica.