Atlantic salmon (Salmo salar); a disease first diagnosed in Norway in 1984. For over 25
years ISAV has caused major disease outbreaks in the Northern hemisphere, and remains
an emerging fish pathogen because of the asymptomatic infections in marine wild fish and
the potential for emergence of new epidemic strains. ISAV belongs to the family
Orthomyxoviridae, together with influenza viruses but is sufficiently different to be assigned …