Nodavirus in farmed Atlantic cod Gadus morhua in Norway
Patel, Sonal; Korsnes, Kjetil; Bergh, Øivind; Todnem Vik-Mo, Frode; Pedersen, Jan Per; Nerland, Audun H.
Journal article, Peer reviewed
Date
2007-09-14Metadata
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Original version
http://dx.doi.org/10.3354/dao01842Abstract
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 immunohistochemistry. 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.