National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The present investigation describes an outbreak among captive grass carp fishes reared by a farmer in a pond near Palampur area, Himachal Pradesh. Clinical signs among affected fishes included inactive swimming/lethargy behavior, no food intake and sudden mortality over a period of 3-4 days. Necropsy examination depicted the presence of necrotic lesions with fibrino-hemorrhagic exudate over hepato-pancreas, pin point hemorrhages accompanied with fibrinous exudates in other visceral organs including coelomic wall along with splenomegaly. The histopathological lesions in the liver comprised of severely lost structural details of hepatocytes, sinusoidal congestion with hemorrhages and deposition of eosinophilic fibrinous exudate along with mononuclear cells infiltration (MNCs). Prominent areas of necro-hemorrhagic tracts along with leucocytic infiltrates were also visible in the pancreatic tissue. The gill filaments showed increased vascularity with fibrin deposition on microscopic evaluation. Based on the gross and histopathological findings the present outbreak causing septicemia among grass carp was attributed to the stress factors such as over-crowding, hypoxia as a result of algal bloom, poor sanitation, imbalance in dissolved gaseous combination, and capture or transportation stress.
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