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Volume 28, Number 2—February 2022
Research Letter

SARS-CoV-2 Circulation, Guinea, March 2020–July 2021

Solène Grayo1Comments to Author , Cécile Troupin12, Moussa Moïse Diagne, Houlou Sagno, Isabelle Ellis, Bakary Doukouré, Amadou Diallo, Jean-Mathieu Bart, Mohamed Lamine Kaba, Benoit Henry, Billy Sivahera Muyisa, Mamadou Saliou Sow, Ndongo Dia, Ousmane Faye, Sakoba Keita, and Noël Tordo
Author affiliations: Institut Pasteur de Guinée, Conakry, Guinea (S. Grayo, C. Troupin, H. Sagno, I. Ellis, B. Doukouré, N. Tordo); Institut Pasteur de Dakar, Dakar, Senegal (M.M. Diagne, A. Diallo, N. Dia, O. Faye); Institut de Recherche pour le Développement-Programme National de Lutte contre la Trypanosomiase Humaine Africaine, Montpellier, France (J.-M. Bart); Camp Militaire Alpha Yaya, Conakry (M.L. Kaba); Centre Médico-Social de l’Ambassade de France, Conakry (B. Henry); Centre Hospitalier de Donka (M.S. Sow); Alliance for International Medical Action, Guinea (B.S. Muyisa); Agence Nationale de Sécurité Sanitaire, Conakry (S. Keita)

Main Article

Figure

Phylogenetic and temporal descriptions of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) sequences from Institut Pasteur de Guinée from samples collected in Guinea during March 12, 2020–July 16, 2021. A) Maximum-likelihood phylogenetic tree of 136 SARS-CoV-2 genomic sequences. The tree was constructed with IQ-tree software by using multiple-genome sequence alignment and Wuhan-Hu-1 strain (GenBank accession no. NC 045512) as outgroup reference sequence, indicated by the red asterisk. Branches and the sequence names are colored according to Nextclade assigned clades: 20A, light gray; 20B, medium gray; 20C, dark gray; 20D, black; 20I/B.1.1.7/Alpha, blue; 21A/B.1.617.2/Delta, azure; 21D/B.1.525/Eta, yellow. Each sequence is highlighted by a black tip. Scale bar indicates the distance corresponding to substitution per site. B) Chronologic distribution of SARS-CoV-2 genomic variants over 17 months in Guinea. The 136 selected sequences are assigned by Nextclade and classified according to sampling date from March 31, 2020, to July 16, 2021. Clades are colored as in panel A.

Figure. Phylogenetic and temporal descriptions of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) sequences from Institut Pasteur de Guinée from samples collected in Guinea during March 12, 2020–July 16, 2021. A) Maximum-likelihood phylogenetic tree of 136 SARS-CoV-2 genomic sequences. The tree was constructed with IQ-tree software by using multiple-genome sequence alignment and Wuhan-Hu-1 strain (GenBank accession no. NC 045512) as outgroup reference sequence, indicated by the red asterisk. Branches and the sequence names are colored according to Nextclade assigned clades: 20A, light gray; 20B, medium gray; 20C, dark gray; 20D, black; 20I/B.1.1.7/Alpha, blue; 21A/B.1.617.2/Delta, azure; 21D/B.1.525/Eta, yellow. Each sequence is highlighted by a black tip. Scale bar indicates the distance corresponding to substitution per site. B) Chronologic distribution of SARS-CoV-2 genomic variants over 17 months in Guinea. The 136 selected sequences are assigned by Nextclade and classified according to sampling date from March 31, 2020, to July 16, 2021. Clades are colored as in panel A.

Main Article

1These authors contributed equally to this article.

2Current affiliation: Institut Pasteur du Cambodge, Phnom Penh, Cambodia.

Page created: November 22, 2021
Page updated: January 23, 2022
Page reviewed: January 23, 2022
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