. observations on the parasitic diseases infecting the blood and gills of some warm water fish

1- A number of 869 fishes included, 606 O. niloticus, 167 C. gariepinus and 96 C. carpio, of different life stages, were obtained alive from River Nile and their tributaries in Sharkia governorate and Abbassa fish farms. These fishes were subjected to cli2- The clinical signs and postmortem findings on the infested fishes with gill parasites were mainly respiratory distress manifestations. Pale and anaemic gills in some infested fish or hyperemic in others with excessive mucous secretion. Some Oreochromis3- The prevalence of the total parasitic infestation was 67.89% among the examined fishes, it was 65.34% among examined O. niloticus (63.95% for wild and 66.37% for .