Evolutionary history and spatiotemporal dynamics of the HIV-1 subtype B epidemic in Guatemala

PloS One
Yaxelis MendozaGustavo Reyes-Terán

Abstract

Different explanations exist on how HIV-1 subtype B spread in Central America, but the role of Guatemala, the Central American country with the highest number of people living with the virus, in this scenario is unknown. We investigated the evolutionary history and spatiotemporal dynamics of HIV-1 subtype B in Guatemala. A total of 1,047 HIV-1 subtype B pol sequences, from newly diagnosed ART-naïve, HIV-infected Guatemalan subjects enrolled between 2011 and 2013 were combined with published subtype B sequences from other Central American countries (n = 2,101) and with reference sequences representative of the BPANDEMIC and BCAR lineages from the United States (n = 465), France (n = 344) and the Caribbean (n = 238). Estimates of evolutionary, demographic, and phylogeographic parameters were obtained from sequence data using maximum likelihood and Bayesian coalescent-based methods. The majority of Guatemalan sequences (98.9%) belonged to the BPANDEMIC clade, and 75.2% of these sequences branched within 10 monophyletic clades: four also included sequences from other Central American countries (BCAM-I to BCAM-IV) and six were mostly (>99%) composed by Guatemalan sequences (BGU clades). Most clades mainly comprised sequences from he...Continue Reading

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