HISTOPATHOLOGY OF SOME DISEASED FISHES

Abstract: A study on the histopathology of some diseased fishes was carried out during the period from July 2005 to June 2006 in the Institute of Biological Sciences, University of Rajshahi, Rajshahi. Symptoms of diseases of different fish species showed variation among the species and its distribution. The parasites were first found to settled on the body surface and tip of the gills of fishes and attach themselves on the surface by their powerful sucking devices. From the histopathological observations it appeared that gills and body surface were the main infested areas and gill filaments were damaged by the parasites. The histochemical studies showed that the disease caused extensive damages to the blood elements by rupturing blood capillaries, causing necrosis, coagulation and haemorrhage