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Molecular Epidemiology of Western Equine Encephalitis Virus, South America, 2023–2024
Aline Scarpellini Campos, Ana Claúdia Franco, Fernanda M. Godinho, Rosana Huff, Darlan S. Candido, Jader da Cruz Cardoso, Xinyi Hua, Ingra M. Claro, Paola Morais, Carolina Franceschina, Thales de Lima Bermann, Franciellen Machado dos Santos, Milena Bauermann, Tainá Machado Selayaran, Amanda Pellenz Ruivo, Cristiane Santin, Juciane Bonella, Carla Rodenbusch, José Carlos Ferreira, Scott C. Weaver, Vilar Ricardo Gewehr, Gabriel Luz Wallau, William M. de Souza
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, and Richard Steiner Salvato
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Author affiliations: Secretaria de Saúde do Estado do Rio Grande do Sul, Porto Alegre, Brazil (A.S. Campos, F.M. Godinho, R. Huff, J. da Cruz Cardoso, P. Morais, C. Franceschina, F. Machado dos Santos, M. Bauermann, T.M. Selayaran, A.P. Ruivo, R.S. Salvato); Universidade Federal do Rio Grande do Sul, Porto Alegre (A.C. Franco, T. de L. Bermann, R.S. Salvato); Imperial College London, London, UK (D.S. Candido); University of Kentucky, Lexington, Kentucky, USA (X. Hua, I.M. Claro, W.M. de Souza); Secretaria de Agricultura do Estado do Rio Grande do Sul, Porto Alegre (C. Santin, J. Bonella, C. Rodenbusch, J.C. Ferreira, V.R. Gewehr); University of Texas Medical Branch, Galveston, Texas, USA (S.C. Weaver); Fundação Oswaldo Cruz, Recife, Brazil (G.L. Wallau); Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany (G.L. Wallau)
Main Article
Figure 2
![Maximum-likelihood phylogenetic tree of 3 new WEEV strains from Rio Grande do Sul state, Brazil (bold text), and reference sequences. Tip colors indicate WEEV lineage. We used an uncorrelated log-normal relaxed molecular clock model with an exponential rate distribution for generating the time-rooted tree. Posterior probability scores appear next to key well-supported nodes. Dates at key nodes are the estimated dates of divergence from a common ancestor, with Bayesian credible intervals. WEEV, western equine encephalitis virus.](/eid/images/24-0530-F2.jpg)
Figure 2. Maximum-likelihood phylogenetic tree of 3 new WEEV strains from Rio Grande do Sul state, Brazil (bold text), and reference sequences. Tip colors indicate WEEV lineage. We used an uncorrelated log-normal relaxed molecular clock model with an exponential rate distribution for generating the time-rooted tree. Posterior probability scores appear next to key well-supported nodes. Dates at key nodes are the estimated dates of divergence from a common ancestor, with Bayesian credible intervals. WEEV, western equine encephalitis virus.
Main Article
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