Histopathological observations of farmed carp fingerlings of Mymensingh area

Histopathological studies were conducted on carp fingerlings of Labeo rohita, Catla catla and Cirrhinus cirrhosus during October 2003 to May 2004 from fish farms of Mymensingh area. Monthly samplings were done with 10 fish from each species with the help of seine net. Skin, muscle, gill and liver were collected, processed and stained in Haematoxylin and Eosin. Histologically carp fingerlings of different fish farms were more affected in colder months by protozoans, monogenean, bacterial and fungal pathogens. Pathological changes like necrosis, fungal granuloma, protozoan cyst, vacuolation, melanomacrophase, haemorrhage, hypertrophy, hyperplasia and clubbing were recorded in all the investigated organs. The fish C. cirrhosus had pathological symptoms like hypertrophy, hyperplasia, necrosis, haemorrhage, inflammation, vacuolation and clubbing. Similar signs were also recorded in L. rohita and C. catla but the degrees of severity were less. Among the fish gills were more affected with protozoan followed by skin, liver and the less affected organ was the muscle. In some cases large bacterial colony and protozoan cyst were observed in the secondary gill lamellae of C. cirrhosus. Key word: Histopathology, carp fingerlings, Mymensingh. Copyright: @ 2012 Chandra, K. J. et al. This is an open access article distributed under the terms of the Creative Common Attribution 3.0 License.