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Volume 32, Number 5—May 2026

Dispatch

Retrospective Phylogenetic Analysis of Mayaro Virus, French Guiana, 1996–2024

Alisé Lagrave1Comments to Author , Antoine Enfissi1, Sourakhata Tirera, Loïc Epelboin, Jean-Bernard Duchemin, Tiphanie Succo, Anne Lavergne, and Dominique Rousset
Author affiliation: Institut Pasteur de la Guyane, Arbovirus National Reference Center, Virology Unit, Cayenne, French Guiana (A. Lagrave, A. Enfissi, S. Tirera, A. Lavergne, D. Rousset); CHU de Guyane, Unité des Maladies Infectieuses et Tropicales, Cayenne (L. Epelboin); CHU de Guyane, CIC Inserm, Santé des Populations Amazoniennes, Cayenne (L. Epelboin); Institut Pasteur de la Guyane, Unité Entomologie médicale, Cayenne (J.-B. Duchemin); Santé Publique France, Cellule Guyane, Cayenne (T. Succo)

Main Article

Figure 1

Bayesian phylogeny of 100 coding sequences from a retrospective phylogenetic analysis of Mayaro virus, French Guiana, 1996–2024. Maximum clade credibility tree inferred by using the general time-reversible with gamma distribution and invariant site substitution model, under a strict clock and Bayesian skyline coalescent prior. The tree was generated by using TreeAnnotator version 1.10.4 (BEAST Developers, https://beast.community/treeannotator), and the resulting time-scaled phylogenies were visualized with FigTree version 1.4.3 (https://tree.bio.ed.ac.uk/software/figtree). The tree includes major genotypes L, N, and D, and sublineages 1 and 2. The amino acid motifs at positions 1714–1716 are shown in color on the right side of the figure; triangles indicate strains with STV deletions. Bootstrap support values are indicated on the corresponding branches; a value of 1 corresponds to 100% bootstrap support. GenBank accession numbers are provided. Scale bar indicates nucleotide substitutions per site.

Figure 1. Bayesian phylogeny of 100 coding sequences from a retrospective phylogenetic analysis of Mayaro virus, French Guiana, 1996–2024. Maximum clade credibility tree inferred by using the general time-reversible with gamma distribution and invariant site substitution model, under a strict clock and Bayesian skyline coalescent prior. The tree was generated by using TreeAnnotator version 1.10.4 (BEAST Developers, https://beast.community/treeannotator), and the resulting time-scaled phylogenies were visualized with FigTree version 1.4.3 (https://tree.bio.ed.ac.uk/software/figtree). The tree includes major genotypes L, N, and D, and sublineages 1 and 2. The amino acid motifs at positions 1714–1716 are shown in color on the right side of the figure; triangles indicate strains with STV deletions. Bootstrap support values are indicated on the corresponding branches; a value of 1 corresponds to 100% bootstrap support. GenBank accession numbers are provided. Scale bar indicates nucleotide substitutions per site.

Main Article

1These first authors contributed equally to this article.

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