Phylogeny and phylogeography of a recent HIV-1 subtype F outbreak among men who have sex with men in Spain deriving from a cluster with a wide geographic circulation in Western Europe

Elena Delgado, María Teresa Cuevas, Francisco Domínguez, Yolanda Vega, Marina Cabello, Aurora Fernández-García, Marcos Pérez-Losada, María Ángeles Castro, Vanessa Montero, Mónica Sánchez, Ana Mariño, Hortensia Álvarez, Patricia Ordóñez, Antonio Ocampo, Celia Miralles, Sonia Pérez-Castro, María José López-Álvarez, Raúl Rodríguez, Matilde Trigo, Julio Diz-ArénCarmen Hinojosa, Pablo Bachiller, Silvia Hernáez-Crespo, Ramón Cisterna, Eugenio Garduño, Lucía Pérez-Álvarez, Michael M Thomson

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We recently reported the rapid expansion of an HIV-1 subtype F cluster among men who have sex with men (MSM) in the region of Galicia, Northwest Spain. Here we update this outbreak, analyze near full-length genomes, determine phylogenetic relationships, and estimate its origin. For this study, we used sequences of HIV-1 protease-reverse transcriptase and env V3 region, and for 17 samples, near full-length genome sequences were obtained. Phylogenetic analyses were performed via maximum likelihood. Locations and times of most recent common ancestors were estimated using Bayesian inference. Among samples analyzed by us, 100 HIV-1 F1 subsubtype infections of monophyletic origin were diagnosed in Spain, including 88 in Galicia and 12 in four other regions. Most viruses (n = 90) grouped in a subcluster (Galician subcluster), while 7 from Valladolid (Central Spain) grouped in another subcluster. At least 94 individuals were sexually-infected males and at least 71 were MSM. Seventeen near full-length genomes were uniformly of F1 subsubtype. Through similarity searches and phylogenetic analyses, we identified 18 viruses from four other Western European countries [Switzerland (n = 8), Belgium (n = 5), France (n = 3), and United Kingdom (n = 2)] and one from Brazil, from samples collected in 2005?2011, which branched within the subtype F cluster, outside of both Spanish subclusters, most of them corresponding to recently infected individuals. The most probable geographic origin and age of the Galician subcluster was Ferrol, Northwest Galicia, around 2007, while the Western European cluster probably emerged in Switzerland around 2002. In conclusion, a recently expanded HIV-1 subtype F cluster, the largest non-subtype B cluster reported in Western Europe, continues to spread among MSM in Spain; this cluster is part of a larger cluster with a wide geographic circulation in diverse Western European countries.

Original languageEnglish
Article numbere0143325
Pages (from-to)1-18
Number of pages18
JournalPLoS One
Volume10
Issue number11
DOIs
Publication statusPublished - 24 Nov 2015

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