Figure 3.

Phylogenetic analysis of severe fever with thrombocytopenia bunyavirus (SFTSV) strains from the current cluster, compared with SFTSV strains from other areas. The phylogenetic trees were constructed using the maximum likelihood method with MEGA5.1 software, based on S and L segments of SFTSV strains from different severe fever with thrombocytopenia syndrome–endemic areas. The reliability values indicated at the branch nodes were determined using 1000 bootstrap replications, and bootstrap values ≥70 were labeled at nodes. The sequences were named according to the province, country, year of collection or isolation, and strain. Red taxon names represent the SFTSV strains from case patients B (Dongtai1) and C (Dongtai2). The scale bar indicates the branch length and corresponds to 0.005 estimated amino acid substitutions per site.