Isolation and Identification of Phathogenic andSaprophytic fungi from gill lesions in cultivated lyprinids [common carp, silver carp and grass carp]

ABSTRACT

Isolation and identification of fungi from gill esions. Gill speciemens from the common carp Cyprinus carpio, silver carp [Hypophthalmichthys molitrix], grass carp [Ctenopharingodon idella]. The samples were obtained from the five fish arms in Mazandaran province and transferred to mycology laboratory with ice conditon. The samples were inoculated in culture media [Sabouroed glucose agar, glucose pepton agar and corm meal agar-choloramphenicol. Chi-square and t-test. Thirty-nine species of fungi were isolated from the gill lesions. The most important pathogenic fungi were Branchiomyces, Saprolegnia, Fusarium, Phoma and Exophiala. The most frequency isolated fungi were Fusarium [46.4ko[3]/41] and saprolegnia [25ko[3]/41], whereas Exophiala [3.6ko[3]/41] was showen the lowest frequency. This is the first report of isolation oi Branchiomyces, Phoma and Exophila from fish in Iran. It is concluded that the above-mentioned isolated pathogenic fungi may play an important rule in fish diseases. Thus this study should be continued into the future