Bulgarian specificity and controversial phylogeography of Mycobacterium tuberculosis spoligotype ST 125__BGR. - RIIP - Réseau International des Instituts Pasteur Accéder directement au contenu
Article Dans Une Revue FEMS Immunology and Medical Microbiology Année : 2010

Bulgarian specificity and controversial phylogeography of Mycobacterium tuberculosis spoligotype ST 125__BGR.

Résumé

The local specificity of bacterial clones may be explained by long-term presence or recent importation/fast dissemination in an area. Mycobacterium tuberculosis spoligotype ST125, noticeably prevalent among Bulgaria-specific spoligotypes, has a characteristically 'abridged' profile and an uncertain clade position [Latin-American-Mediterranean (LAM)/S]. A comparison with the SITVIT2 database (Institut Pasteur de Guadeloupe) demonstrated its high gradient in Bulgaria (14.3%) compared with the negligible presence in the rest of the world. Further typing of all available Bulgarian ST125 strains revealed that they: (i) monophyletically clustered in 21-mycobacterial interspersed repetitive units (MIRU)-loci tree of all Bulgarian strains; (ii) grouped closely with the ST34 spoligotype, a prototype of the S family; and (iii) did not harbor a LAM-specific IS6110 insertion. Comparison of the 21-MIRU-based network with geographic data revealed a complex dissemination pattern of ST125 in Bulgaria. Interestingly, this variable number of tandem repeats (VNTR) network remarkably corroborated with a recent hypothesis of single repeat loss as the primary mode of evolution of VNTR loci in M. tuberculosis. In conclusion, M. tuberculosis spoligotype ST125 is phylogeographically specific for Bulgaria. This spoligotype was not associated with drug resistance or increased transmissibility; its prevalence in Bulgaria can rather be attributed to the historical circulation in the country, having led, speculatively, to adaptation to the local human population.

Domaines

Bactériologie
Fichier non déposé

Dates et versions

pasteur-00691770 , version 1 (27-04-2012)

Identifiants

Citer

Violeta Valcheva, Igor Mokrousov, Stefan Panaiotov, Elizabeta Bachiiska, Thierry Zozio, et al.. Bulgarian specificity and controversial phylogeography of Mycobacterium tuberculosis spoligotype ST 125__BGR.. FEMS Immunology and Medical Microbiology, 2010, 59 (1), pp.90-9. ⟨10.1111/j.1574-695X.2010.00667.x⟩. ⟨pasteur-00691770⟩
33 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More