Fig. 4

PRV-1 loads. A Individual (dot) PRV-1 RNA blood loads collected from either recent mortalities, moribund individuals, or members of the normal Atlantic salmon population across 19 commercial net-pen farms sites in British Columbia are contrasted by one-way ANOVA. B qPCR Ct values for blood and heart samples for 16 fish in which both blood and heart samples were simultaneously collected are compared by a paired T-test (**** = p-value < 0.0001. C the individual distribution (dots) and mean (dotted line) of qPCR Ct from all blood samples from a single commercial producer are presented relative to days at sea. D mean (line) and individual (dot) PRV-1 RNA blood loads of fish for which the combined heart histopathology score for lymphohistiocytic epi- and endo-carditis was either not present, mild, moderate (mod), or severe (sev)