Three new strains of infectious pancreatic necrosis virus isolated in Canada.

Three new samples of infectious pancreatic necrosis virus (IPNV) isolated in Canada were compared with known serotypes by phenotypic properties, immunofluorescence, and protein and RNA molecular weights. The three new isolates were each found to be unique by these parameters. The most convincing physical difference used to distinguish the new isolates from known serotypes was their RNA molecular weights. Thus, the new CB, NASRC, and Char isolates of IPNV represent three new strains of the virus.