Possible ISA reported at Newfoundland facility

Grieg Seafood Newfoundland has reported a case of infectious salmon anaemia (ISA) at its Marystown site, on Canada’s Atlantic coast.

The virus, which is currently one of the most serious threats to farmed salmon, was found in one Atlantic salmon parr during a routine health inspection. The fish was part of a 2020/21 trial group for Grieg’s Newfoundland operation, and was in a tank containing 118,000 individuals.

Grieg said: “More analysis is needed to determine whether the fish is infected or not. The detection has not been confirmed by regulatory agencies.

“Further testing is ongoing in cooperation with veterinarians from the province, with independent analysis to be provided from accredited labs. All precautionary infection control measures are implemented, in line with regulations.”

The company said that the fish in question was recently vaccinated against ISA and that current stock are not showing any symptoms of disease, nor have there been any instances of increased mortality.

The Marystown fresh water facility is part of Grieg’s investment in Newfoundland, which will see fish farms established in Placentia Bay.

ISA outbreaks are currently causing major problems for farmers in Norway.