Mycobacterium africanum is associated with patient ethnicity in Ghana.

Abstract:

:Mycobacterium africanum is a member of the Mycobacterium tuberculosis complex (MTBC) and an important cause of human tuberculosis in West Africa that is rarely observed elsewhere. Here we genotyped 613 MTBC clinical isolates from Ghana, and searched for associations between the different phylogenetic lineages of MTBC and patient variables. We found that 17.1% (105/613) of the MTBC isolates belonged to M. africanum, with the remaining belonging to M. tuberculosis sensu stricto. No M. bovis was identified in this sample. M. africanum was significantly more common in tuberculosis patients belonging to the Ewe ethnic group (adjusted odds ratio: 3.02; 95% confidence interval: 1.67-5.47, p<0.001). Stratifying our analysis by the two phylogenetic lineages of M. africanum (i.e. MTBC Lineages 5 and 6) revealed that this association was mainly driven by Lineage 5 (also known as M. africanum West Africa 1). Our findings suggest interactions between the genetic diversity of MTBC and human diversity, and offer a possible explanation for the geographical restriction of M. africanum to parts of West Africa.

journal_name

PLoS Negl Trop Dis

authors

Asante-Poku A,Yeboah-Manu D,Otchere ID,Aboagye SY,Stucki D,Hattendorf J,Borrell S,Feldmann J,Danso E,Gagneux S

doi

10.1371/journal.pntd.0003370

subject

Has Abstract

pub_date

2015-01-08 00:00:00

pages

e3370

issue

1

eissn

1935-2727

issn

1935-2735

pii

PNTD-D-14-01295

journal_volume

9

pub_type

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