author(s)
B Kalita, A Ali, S Islam, IA Hussain and H Pokhrel

abstract
A summary of the incidences of some fish diseases in 7 districts of Assam has been presented. During the two years (2013-15), a total of 39 incidences have been recorded from 29 fish farms in the study areas under the National Surveillance Programme for Aquatic Animal Diseases. These includes: 10 Epizootic Ulcerative Syndrome (EUS), 8 Argulus, 2 Myxobolus, 2 Fin-rot, 5 dropsy, 5 hemorrhagic septicemia and 7 of Environmental nature. Incidences of EUS is highest (25.64%) followed by Argulus (20.51%) and lowest in Myxobolus and fin-rot (5.13%) each. EUS happens to infect in greater (34.97%) areas followed by dropsy (33.80%). Most disease incidences occur in winter season contrary to Argulus that occurs throughout the year.