HIV-1 in Waraos Figure 2. Phylogenetic analysis of HIV isolates infecting Waraos (Neighbor Joining method). Pol region (approximately 1400 nt). Env region (approximately 280 nt). Vif region (approximately 540 nt). Nef region (approximately 780 nt). Isolates are designated by their GenBank accession number and the name of the country of origin, except for Venezuelan isolates, which are shown by their name and in red for the ones PLoS ONE | www.plosone.org 3 July 2012 | Volume 7 | Issue 7 | e40626