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http://dx.doi.org/10.7847/jfp.2022.35.2.215

Disease monitoring of cultured rainbow trout and coho salmon in Gangwon province in 2021  

Soo-ji, Woo (East Sea Fisheries Research Institute, National Institute of Fisheries Science)
Seung Hoon, Lee (East Sea Fisheries Research Institute, National Institute of Fisheries Science)
So-Sun, Kim (East Sea Fisheries Research Institute, National Institute of Fisheries Science)
Soon-Gyu, Byun (East Sea Fisheries Research Institute, National Institute of Fisheries Science)
Joon-Young, Song (Pathology Research Division, National Institute of Fisheries Science)
Seong Don, Hwang (Division of Convergence on Marine Science, Korea Maritime and Ocean University)
Publication Information
Journal of fish pathology / v.35, no.2, 2022 , pp. 215-223 More about this Journal
Abstract
Disease including parasite, bacteria and virus cause serious mortality to salmonid fish in the aquaculture. In this study, we investigated the current disease status of the rainbow trout (Oncorhynchus mykiss) and coho salmon (Oncorhynchus kisutch) in Yanayang, Pyeongchang, Jeongseon and Yeongwol of Gangwon province in 2021 and performed molecular characterization of those pathogen. For parasites, Ichthyophthirius multifiliis was observed at 2 farms. For bacteria, we identified Aeromonas sobria from kidney of rainbow trout using phylogenetic analysis of gyrB gene. A. salmonicida were isolated from necrosis site of gill cover and fin in coho salmon and necrotic lesion of fin in rainbow trout. Phylogenetic analysis using vap gene indicated that A. salmonicida isolated in this study were clustered with previously reported A. salmonicida subsp. salmonicida isolates. For virus, JRt-Nagano type of infectious haematopoietic necrosis virus was detected in rainbow trout, but infectious pancreatic necrosis virus and Oncorhynchus masou virus were not detected. These results provide useful information for the prevention of disease spread and transmission when cultivating new species such as Atlantic salmon in Korea.
Keywords
Rainbow trout; Coho salmon; Aeromonas; Phylogenetic analysis; Infectious haematopoietic necrosis virus;
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