Nodavirus in farmed Atlantic cod Gadus morhua in Norway

Viral encephalopathy and retinopathy (VER) was diagnosed in 5 to 24 g sized farmed Atlantic cod Gadus morhua kept in sea cages at Parisvatn, Hordaland county, on the west coast of Norway. Moderate mortality (10 to 15 %) was observed, along with anorexia and abnormal swimming behaviour, such as loopi...

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Bibliographic Details
Published in:Diseases of Aquatic Organisms
Main Authors: Patel, Sonal, Korsnes, Kjetil, Bergh, Øivind, Vik-Mo, Frode, Pedersen, Jan, Nerland, Audun Helge
Format: Article in Journal/Newspaper
Language:English
Published: Inter-Research 2015
Subjects:
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Fish health: 923
Norway
atlantic cod
Gadus morhua
Online Access:http://hdl.handle.net/11250/295010
https://doi.org/10.3354/dao01842
Description
Summary:Viral encephalopathy and retinopathy (VER) was diagnosed in 5 to 24 g sized farmed Atlantic cod Gadus morhua kept in sea cages at Parisvatn, Hordaland county, on the west coast of Norway. Moderate mortality (10 to 15 %) was observed, along with anorexia and abnormal swimming behaviour, such as looping or spiral swimming and reduced coordination. Nodavirus was detected by 2 different real-time RT-PCR assays, and this was later confirmed by inmumohistochemistry. This is the first report of an outbreak of VER in farmed cod in Norway, and the first report that VER affect cod exceeding 5 g in size.

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