Figure 2.

Maximum clade credibility tree of 31 N8 sequences derived from the neuraminidase gene of avian influenza viruses (1377 nt). Sampling dates and locations are included on the tip labels; where specific dates were unknown, ‘01’ was assigned. Node labels indicate significant posterior probabilities (>0.75). The dates for the most recent common ancestor (MRCA) are indicated at the relevant nodes with 95% highest posterior density (HPD) levels. Sequences relate to H5N8 subtype unless otherwise noted. Sequences reported in this study are in bold.