Figure 4. . . Phylogenetic tree of orthoreoviruses based on partial sequence alignment of the major outer capsid protein (S4 gene segment). GenBank accession number for each sequence is in parentheses after the virus name. Numbers at nodes indicate bootstrap values based on 1,000 replicates. Dots indicate viruses isolated from 3 travelers who had returned from Indonesia to Hong Kong during 2007–2010. Scale bar indicates nucleotide substitutions per site. ARV, avian reovirus; BRV, baboon reovirus; NBV, Nelson Bay virus; RRV, reptilian reovirus.