Salmon virus originally from the Atlantic, spread to B.C. wild salmon from farms: Study

It also shows that wild Chinook salmon are more likely to be infected with PRV the closer they are to salmon farms, which suggests farms transfer the virus to wild salmon.

Genome sequencing of viruses from farms and wild fish further indicates that transmission occurs between farms and wild salmon.

“Both our genomic and epidemiological methods independently came to the same conclusion, that salmon farms act as a source and amplifier of PRV transmission,” said Dr. Gideon Mordecai, a viral ecologist and Liber Ero fellow with UBC Science and researcher with UBC Medicine, who led the study. “Because separate lines of independent evidence all point to the same answer, we’re confident in our finding.”

Source: Salmon virus originally from the Atlantic, spread to B.C. wild salmon from farms: Study