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Preliminary Epidemiological Studies on Epizootic Ulcerative Syndrome (EUS) in Freshwater Fishes of Assam

Authors(7):

Devashish Kar, Ratnabir Singha, Biplab Kumar Das, Riji John, Rosalind George, M. Mansoor, Mahesh Selva
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Preliminary epidemiological investigation was carried out to examine the status of Epizootic Ulcerative Syndrome among the freshwater (FW) fishes of Cachar district in Assam during the period from January 2013 to May 2015. Our study revealed fluctuation in the intensity of the disease in relation to species affected. A total of c 581 EUS-affected fishes were recorded during the present study period. The temperature of air and water of the wetlands were recorded as 17o C to 35o C and 19o C to 28o C respectively. pH was recorded as 5.5 to 7.0. The most prevalent symptoms of EUS disease, as reported by the farmers, were ulceration on the skin followed by tail and fin rot. The Case Fatality Ratio (CFR) has been calculated species wise and has been found to be high among Cirrhinus mrigala (83.72 %), followed by Puntius ticto (75 %), Channa marulius (70 %), Mastacembelus armatus 69.23 %), Anabas testudineus  (53.85 %), and, so on.  Further, the Specific Death Rate (SDR) due to EUS was found to be 57.89 %. Communicative nature of EUS revealed variation in time gap between fish and infection in different species. Financial loss to farmers due to fish disease was colossal, as was revealed through interviewing the Fish farmers.

Devashish Kar, Ratnabir Singha, Biplab Kumar Das, Riji John, Rosalind George, M. Mansoor, Mahesh Selva

Fish, diseases, EUS, Epidemiology, Cachar, Assam, India.

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Publication Details

Published in : Volume 1 | Issue 5 | September-October - 2015
Date of Publication Print ISSN Online ISSN
2015-10-25 2395-1990 2394-4099
Page(s) Manuscript Number   Publisher
256-263 IJSRSET151557   Technoscience Academy

Cite This Article

Devashish Kar, Ratnabir Singha, Biplab Kumar Das, Riji John, Rosalind George, M. Mansoor, Mahesh Selva, "Preliminary Epidemiological Studies on Epizootic Ulcerative Syndrome (EUS) in Freshwater Fishes of Assam", International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 1, Issue 5, pp.256-263, September-October-2015.
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