Studies on the external protozoal parasites in catfish (clarias gariepinus)‎ in Dakahlia province

الملخص EN

A total number of 240 catfish (Clarias gariepinus) were collected from different markets in Dakahlia province during a period extended from January 2005 to the end of December 2005.

Parasitological examinations of the skin and the fins revealed that the rate of infection with Trichodina fultoni was (23.75%), Chilodenella hexastich (11.66%), Ichthyophthiriius multifilis (3.33%), Ichthyoboda spp.

(6.66%) and Myxobolus dermatoid was (5.83%).

While gills were infected with higher rate, Trichodina fultoni (35.83%), Ichthyoboda spp.

(17.08%), Henneguya bronchioles (45.83%) and Myxobolus dermatoid (14.16%).

Concerning seasonal dynamics of infection, it was found that the highest rate of infection of both skin, fins and gills were in winter then spring, followed by autumn and the lowest rates wuse in summer.

A full descriptions of the obtained protozoan parasites were done.