Endemic Venezuelan Equine Encephalitis in Northern Peru
Figure 3. Phylogenetic tree of the Venezuelan equine encephalitis virus (VEEV) complex derived from partial PE2 gene sequences of Peruvian VEEV isolates and homologous sequences published previously, using the neighbor joining program implemented in PAUP 4.0 (22). The tree was rooted using an outgroup comprised of four major lineages of Eastern Equine Encephalitis virus (26). Virus strains are labeled by VEE complex subtype, abbreviated country (FL=Florida, USA) and year of isolation, followed by strain designation. Numbers indicate bootstrap values for clades to the right.