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Author Topic: More Concerns  (Read 2270 times)

chris gadsden

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More Concerns
« on: July 16, 2013, 01:24:33 PM »
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adriaticum

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Re: More Concerns
« Reply #1 on: July 16, 2013, 01:54:45 PM »
OMG how can it be, it can't be true  :o :o
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Dave

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Re: More Concerns
« Reply #2 on: July 16, 2013, 02:00:19 PM »
No concern here.  We both know the cutthroat trout samples from Cultus Lake came from perfectly healthy, robust fish.
Too bad the authors didn't sample DFO hatchery salmon or steelhead as I would bet it would be found in them as well and, imagine the angst for some fear spreaders that would be.  Anyway, Riddell and Miller will be getting to that.
Go fishing Chris ;)
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Easywater

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Re: More Concerns
« Reply #3 on: July 16, 2013, 02:22:58 PM »
Some random quotes from the articles linked:

Piscine reovirus (PRV) was identified in 2010 as the causative agent of heart and skeletal muscle inflammation (HSMI) in Norway.

In this paper, the co-authors show that piscine reovirus is in British Columbia and it came from Norway.

The piscine reovirus sequences included in the paper were from farmed Atlantic salmon bought in Vancouver supermarkets, wild cutthroat trout from Cultus Lake, chum salmon from near Campbell River, farmed steelhead from Lois Lake and farmed Atlantic salmon morts from the central coast of British Columbia.

With depletion of wild stocks, suppliers are shifting from capture fishing to aquaculture.

However, the emergence of infectious diseases in aquaculture threatens production and may also impact wild fish populations.

Heart and skeletal muscle inflammation (HSMI), first detected in farmed Atlantic salmon (Salmo salar L.) in a single farm in Norway in 1999[1], has now been reported in 417 farms in Norway, as well as in the United Kingdom[2]. HSMI appears 5 to 9 months after fish are transferred from fresh water to ocean pens[1], is characterized by epi-, endo- and myocarditis, myocardial necrosis, myositis and necrosis of red skeletal muscle, and up to 20% mortality

Here we provide evidence that HSMI is associated with infection with a novel reovirus. Piscine reovirus (PRV) was identified through high-throughput pyrosequencing...

Last month the World Health Organization for Animal Health (OIE) stripped the Kibenge Lab of its international authority as a reference lab for a different European virus, called ISAv. They have declined to give a reason.

The co-authors recommend that PRV-HSMI be treated as an emerging disease. The Department of Fisheries and Oceans (DFO) and the Canadian Food Inspection Agency (CFIA) do not test for PRV. Norwegian scientist, Dr. Are Nylund, University of Bergen, recommends measures to remove PRV-positive Atlantic salmon from net pens in the ocean to prevent spread of this Atlantic virus into the Pacific.

The only containment of PRV possible would be to cull infected farmed salmon and to end the practice of using net pens to raise Atlantic salmon on wild salmon migration routes. This would be a significant risk to the viability of the 98% Norwegian-owned industry operating in British Columbia.

The Province of British Columbia does not accept that PRV causes HSMI.
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