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 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.
Patel
Sonal
S
Institute of Marine Research, PO Box 1870 Nordnes, 5817 Bergen, Norway.
Korsnes
Kjetil
K
Bergh
Øivind
Ø
Vik-Mo
Frode
F
Pedersen
Jan
J
Nerland
Audun Helge
AH
D000818:Animals; D000914:Antibodies, Viral / Q000032:analysis / Q000378:metabolism; D001522:Behavior, Animal; D001921:Brain / Q000821:virology; D005393:Fish Diseases / Q000453:epidemiology* / Q000401:mortality / Q000821:virology*; D005398:Fisheries; D048389:Gadus morhua / Q000821:virology*; D007150:Immunohistochemistry / Q000662:veterinary; D030381:Nodaviridae / Q000302:isolation & purification* / Q000472:pathogenicity; D009664:Norway / Q000453:epidemiology; D012327:RNA Virus Infections / Q000453:epidemiology / Q000401:mortality / Q000662:veterinary* / Q000821:virology; D012160:Retina / Q000473:pathology / Q000821:virology; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000662:veterinary
D000914:Antibodies, Viral