Undiagnosed — Worldwide/Unknown
The Norwegian Veterinary Institute (NVI) has identified a new disease in hatcheries for rainbow trout. Preliminary information suggests that the disease is caused by a virus and that it is contagious.
The mortality rate had partly increased in the hatcheries, which led producers to contact the Norwegian Food Safety Authorities (NFSA). They brought in the NVI and both are now working closely with the Norwegian fish health services and industry players to identify the cause and determine how
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