Figure 5

Phylogenetic tree of segment 6 sequences from selected ISAV isolates of European genotype. The analysis was performed using 1008 nucleotides of the 5′ portion of the HE gene (excluding the HPR). The phylogenetic tree was constructed by maximum likelihood (ML) using Tamura-Nei and Neighbor-joining [51]. All ISAV-HPR0 viruses are shown in blue and the ISAV-HPR∆ viruses (ISAV-HPR3 and ISAV-HPR14) associated with the 2013 ISA outbreaks in Chile are shown in red.