Continued Evolution of West Nile Virus, Houston, Texas, USA, 2002–2012
Figure 4. . Phylogenetic support for expanded application of the proposed Harris County, Texas, USA, paradigm as a model for West Nile virus (WNV) evolution during the Dallas/Fort Worth, Texas, outbreak, 2012. Bayesian coalescent tree depicts shared monophyletic lineage of the novel Collin County WNV isolates in group 9 (TX AR12-1648) and group 10 (TX AR12-10674) with the TX AR12-1486 Denton County, Texas, isolate clustering with the TX8572 2012 Harris County isolate. Red indicates novel Collin County and Denton County isolates sequenced in this study. Posterior probabilities ≥0.90 are indicated along the branches to provide statistical support for inferred topologies. Scale bar indicates divergence time in years.