Deadly PRV virus not ‘sole cause’ of disease affecting farmed Atlantic salmon in B.C., study finds GlobeBC
Ryan Wogan examines a salmon during a Department of Fisheries and Oceans fish health audit at the Okisollo fish farm near Campbell River, B.C,. on Oct. 31, 2018.Two new studies suggest a fish virus linked with a potentially deadly disease in Norway that has inspired an anti-fish farm movement on the West Coast isn’t as harmful as some believe.
While PRV could be a contributing factor to fish developing the disease, the study suggests it’s not the sole cause and seems to cause less harm, Polinski said. The virus load exploded in the healthy fish, but they didn’t develop the significant heart lesions that the original infected fish had. Some developed minor heart inflammation but that also happened in the control population of healthy fish, he said.
“It’s probably likely that PRV is not making the situation any better and very well may be contributing to it, but it’s hard to pin it all on PRV.” The federal government also announced Wednesday that it will not appeal a recent Federal Court decision ordering it to review its policy not to test young farmed salmon for PRV before the fish are transferred to open-net farms along the British Columbia coast.
Wilkinson said the court decision doesn’t compel him to change the policy not to test for PRV ahead of a transfer, but the department will make decisions on that and other aspects of its policy using the best scientific information available.
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