FIG. 1.

Maximum-likelihood phylogenetic tree showing the HIV transmission clusters (n = 32) involving ≥1 Latino sequences from initial tree built with sequences from 177 Latinos and 1496 non-Latinos (only clusters involving Latino sequences with bootstrap support >90% and supported by confirmatory analyses are shown here). Nodes defining clusters are labeled with bootstrap support generated by RAxML. Larger clusters (n ≥ 3 members) are labeled C1–C10. Small cluster “pairs” (n = 2 members) that are heterosexual (HET) are labeled P1–P12 and men who have sex with men (MSM) are labeled P13–P22). Sequences with transmitted drug resistance (TDR) are labeled with identified mutations. *Cluster pairs (n = 5) involving partners immigrating from the same country and where partnerships began prior to immigration. Clusters involving women (n = 14) are highlighted in gray.