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2016-10-13

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/125274

A novel strategy based on genomics and specific PCR reveals how a multidrug resistant Mycobacterium tuberculosis strain became prevalent in Equatorial Guinea 15 years after its emergence.

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https://doi.org/10.1016/j.cmi.2016.10.006

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OBJECTIVE: Molecular epidemiology techniques in tuberculosis (TB) can identify high-risk strains that are actively transmitted. We aimed to implement a novel strategy to optimize the identification and control of multidrug-resistant (MDR) TB in a specific population. METHODS: We developed a strain-specific PCR tailored from whole genome sequencing (WGS) data to track a specific MDR prevalent strain in Equatorial Guinea (EG-MDR). RESULTS: The PCR was applied prospectively on remnants of GeneXpert reaction mixtures owing to the lack of culture facilities in Equatorial Guinea. In 147 (93%) of 158 cases, we were able to differentiate between infection by the EG-MDR strain or by any other strain and found that 44% of all rifampicin-resistant TB cases were infected by EG-MDR. We also analysed 93 isolates obtained from Equatorial Guinea 15 years ago, before MDR-TB had become the problem it is today. We found that two of the scarce historical MDR cases were infected by EG-MDR. WGS revealed low variability-six single nucleotide polymorphisms acquired by this strain over 15 years-likely because of the lack in the country of a specific program to treat MDR-TB. CONCLUSIONS: Our novel strategy, which integrated WGS analysis and strain-specific PCRs, represents a low-cost, rapid and transferable strategy that allowed a prospective efficient survey and fast historical analysis of MDR-TB in a population.

Matèries

Genòmica, Mycobacterium tuberculosis, Guinea Equatorial

Matèries (anglès)

Genomics, Mycobacterium tuberculosis, Equatorial Guinea

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Articles publicats en revistes (Fonaments Clínics)

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PÉREZ-LAGO, Laura, et al. A novel strategy based on genomics and specific PCR reveals how a multidrug resistant Mycobacterium tuberculosis strain became prevalent in Equatorial Guinea 15 years after its emergence. Clinical Microbiology and Infection. 2016. Vol. 23, num. 2, pags. 92-97. ISSN 1198-743X. [consulted: 11 of August of 2026]. Available at: https://hdl.handle.net/2445/125274

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