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  1. KRISHI Publication and Data Inventory Repository
  2. Fisheries A6
  3. ICAR-National Bureau of Fish Genetic Resources I9
  4. FS-NBFGR-Publication
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Please use this identifier to cite or link to this item: http://krishi.icar.gov.in/jspui/handle/123456789/61900
Title: Infectious spleen and kidney necrosis virus-associated large-scale mortality in farmed giant gourami, Osphronemus goramy, in India
Other Titles: Journal of Fish Diseases
Authors: T. Raja Swaminathan
Sundar Raj Nithianantham
Preena Prasannan Geetha
P. K. Pradhan
Neeraj Sood
Rahul G Kuamr
Arun Sudhager S
Naresh Kumar Sood
Published/ Complete Date: 2021-8-1
Keywords: Megalocytivirus,Osphronemus goramy,infectious spleen and kidney necrosis virus,electron microscopy
Publisher: Not Available
Citation: Swaminathan TR, Raj NS, Preena PG, Pradhan PK, Sood N, Kumar RG, Sudhagar A, Sood NK. Infectious spleen and kidney necrosis virus-associated large-scale mortality in farmed giant gourami, Osphronemus goramy, in India. J Fish Dis. 2021 Aug 27. doi: 10.1111/jfd.13519.
Abstract/Description: Megalocytivirus cause diseases that have serious economic impacts on aquaculture, mainly in East and South-East Asia. Five primary genotypes are known: infectious spleen and kidney necrosis virus (ISKNV), red sea bream iridovirus (RSIV), turbot reddish body iridovirus (TRBIV), threespine stickleback iridovirus (TSIV) and scale drop disease virus (SDDV). ISKNV-mediated infectious spleen and kidney necrosis disease (ISKND) is a major viral disease in both freshwater and marine fish species. In this study, we report the isolation of ISKNV from diseased giant gourami, Osphronemus goramy, in India. Transmission electron microscopy of ultrathin sections of kidney and spleen revealed the presence of numerous polygonal naked viral particles having an outer nucleocapsid layer within the cytoplasm of enlarged cells (115-125 nm). Molecular and phylogenetic analyses confirmed the presence of ISKNV and the major capsid protein (MCP) (1,362 bp) gene in the infected fish had a high similarity to the other ISKNV-I isolates. Moreover, ISKNV was propagated in the Astronotus ocellatus fin (AOF) cell line and further confirmed genotypically. A high mortality rate (60%) was observed in gourami fish injected with ISKNV-positive tissue homogenate through challenge studies. Considering the lethal nature of ISKNV, the present study spotlights the implementation of stringent biosecurity practices for the proper control of the disease in the country.
Description: Not Available
ISBN: Not Available
ISSN: 0140-7775
Type(s) of content: Research Paper
Language: English
URI: http://krishi.icar.gov.in/jspui/handle/123456789/61900
Appears in Collections:FS-NBFGR-Publication

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