Journal
INTERNATIONAL JOURNAL OF MYCOBACTERIOLOGY
Volume 2, Issue 4, Pages 194-198Publisher
WOLTERS KLUWER MEDKNOW PUBLICATIONS
DOI: 10.1016/j.ijmyco.2013.08.001
Keywords
MDR-TB; Spoligotyping; pncA Gene; Molecular epidemiology
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Funding
- Swedish East Europe Committee
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Setting: This study was performed in the city of Minsk in Belarus, where a very severe problem with MDR-TB was demonstrated in a recent drug resistant survey. Objective The aim of this study was to use molecular typing of MDR and pan-susceptible clinical isolates of Mycobacterium tuberculosis to increase the understanding of the transmission patterns and possible differences between the strains causing susceptible and drug-resistant tuberculosis. Study population and methods: Consecutive isolates from pulmonary TB patients in Minsk were collected at the Belarusian National Reference Laboratory. Isolates found to be either pan-susceptible or MDR were included in the study, which totally comprised 81 MDR and 82 pan-susceptible clinical isolates. All isolates were characterized by spoligotyping. The major clusters were characterized using sequencing of the pncA gene. Results: Three out of four MDR cases were caused by one out of two drug-resistant clones of M. tuberculosis belonging to the Beijing and T1 genotypes, respectively. A single T1 clone, SITNo. 266, found exclusively in the MDR cohort, was shown to cause noless than 30% of all MDR-TB cases. Discussion: The findings indicate that the major cause of MDR-TB in Minsk is an ongoing transmission of certain already resistant M. tuberculosis strains. Conclusion: The significant transmission of MDR-TB in Minsk underlines the urgent need for strengthened infection control measures to limit the transmission in order to better control MDR-TB. (C) 2013 Asian-African Society for Mycobacteriology. Published by Elsevier Ltd. All rights reserved.
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