Fig. 5

Heart Inflammation relative to PRV-1 status. Prevalence of heart inflammation (combined score for lymphohistiocytic epi- and endo-carditis) in Atlantic salmon net-pen production mortalities across sites from all three regional producers is presented for both PRV-1 positive and PRV-1 negative populations. For Producer A, heart inflammation scores and PRV-1 status were matched to individual fish. For Producers B and C, PRV-1 status is indicated at the population level as fish screened for PRV-1 were not necessarily the same fish screened by histopathology for heart inflammation