Phylogenomics of Mycobacterium africanum reveals a new lineage and a complex evolutionary history
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Phylogenomics of Mycobacterium africanum reveals a new lineage and a complex evolutionary history. / Coscolla, Mireia; Gagneux, Sebastien; Menardo, Fabrizio; Loiseau, Chloé; Ruiz-Rodriguez, Paula; Borrell, Sonia; Otchere, Isaac Darko; Asante-Poku, Adwoa; Asare, Prince; Sánchez-Busó, Leonor; Gehre, Florian; Sanoussi, C N'Dira; Antonio, Martin; Affolabi, Dissou; Fyfe, Janet; Beckert, Patrick; Niemann, Stefan; Alabi, Abraham S; Grobusch, Martin P; Kobbe, Robin; Parkhill, Julian; Beisel, Christian; Fenner, Lukas; Böttger, Erik C; Meehan, Conor J; Harris, Simon R; de Jong, Bouke C; Yeboah-Manu, Dorothy; Brites, Daniela.
in: MICROB GENOMICS, Jahrgang 7, Nr. 2, 02.2021.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung
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T1 - Phylogenomics of Mycobacterium africanum reveals a new lineage and a complex evolutionary history
AU - Coscolla, Mireia
AU - Gagneux, Sebastien
AU - Menardo, Fabrizio
AU - Loiseau, Chloé
AU - Ruiz-Rodriguez, Paula
AU - Borrell, Sonia
AU - Otchere, Isaac Darko
AU - Asante-Poku, Adwoa
AU - Asare, Prince
AU - Sánchez-Busó, Leonor
AU - Gehre, Florian
AU - Sanoussi, C N'Dira
AU - Antonio, Martin
AU - Affolabi, Dissou
AU - Fyfe, Janet
AU - Beckert, Patrick
AU - Niemann, Stefan
AU - Alabi, Abraham S
AU - Grobusch, Martin P
AU - Kobbe, Robin
AU - Parkhill, Julian
AU - Beisel, Christian
AU - Fenner, Lukas
AU - Böttger, Erik C
AU - Meehan, Conor J
AU - Harris, Simon R
AU - de Jong, Bouke C
AU - Yeboah-Manu, Dorothy
AU - Brites, Daniela
PY - 2021/2
Y1 - 2021/2
N2 - Human tuberculosis (TB) is caused by members of the Mycobacterium tuberculosis complex (MTBC). The MTBC comprises several human-adapted lineages known as M. tuberculosis sensu stricto, as well as two lineages (L5 and L6) traditionally referred to as Mycobacterium africanum. Strains of L5 and L6 are largely limited to West Africa for reasons unknown, and little is known of their genomic diversity, phylogeography and evolution. Here, we analysed the genomes of 350 L5 and 320 L6 strains, isolated from patients from 21 African countries, plus 5 related genomes that had not been classified into any of the known MTBC lineages. Our population genomic and phylogeographical analyses showed that the unclassified genomes belonged to a new group that we propose to name MTBC lineage 9 (L9). While the most likely ancestral distribution of L9 was predicted to be East Africa, the most likely ancestral distribution for both L5 and L6 was the Eastern part of West Africa. Moreover, we found important differences between L5 and L6 strains with respect to their phylogeographical substructure and genetic diversity. Finally, we could not confirm the previous association of drug-resistance markers with lineage and sublineages. Instead, our results indicate that the association of drug resistance with lineage is most likely driven by sample bias or geography. In conclusion, our study sheds new light onto the genomic diversity and evolutionary history of M. africanum, and highlights the need to consider the particularities of each MTBC lineage for understanding the ecology and epidemiology of TB in Africa and globally.
AB - Human tuberculosis (TB) is caused by members of the Mycobacterium tuberculosis complex (MTBC). The MTBC comprises several human-adapted lineages known as M. tuberculosis sensu stricto, as well as two lineages (L5 and L6) traditionally referred to as Mycobacterium africanum. Strains of L5 and L6 are largely limited to West Africa for reasons unknown, and little is known of their genomic diversity, phylogeography and evolution. Here, we analysed the genomes of 350 L5 and 320 L6 strains, isolated from patients from 21 African countries, plus 5 related genomes that had not been classified into any of the known MTBC lineages. Our population genomic and phylogeographical analyses showed that the unclassified genomes belonged to a new group that we propose to name MTBC lineage 9 (L9). While the most likely ancestral distribution of L9 was predicted to be East Africa, the most likely ancestral distribution for both L5 and L6 was the Eastern part of West Africa. Moreover, we found important differences between L5 and L6 strains with respect to their phylogeographical substructure and genetic diversity. Finally, we could not confirm the previous association of drug-resistance markers with lineage and sublineages. Instead, our results indicate that the association of drug resistance with lineage is most likely driven by sample bias or geography. In conclusion, our study sheds new light onto the genomic diversity and evolutionary history of M. africanum, and highlights the need to consider the particularities of each MTBC lineage for understanding the ecology and epidemiology of TB in Africa and globally.
U2 - 10.1099/mgen.0.000477
DO - 10.1099/mgen.0.000477
M3 - SCORING: Journal article
C2 - 33555243
VL - 7
JO - MICROB GENOMICS
JF - MICROB GENOMICS
SN - 2057-5858
IS - 2
ER -
