Título:
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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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Autor/a:
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Pérez-Lago, Laura; Izco, Santiago; Herranz, Marta; Tudó i Vilanova, Griselda; Carcelén, María; Comas, Iñaki; Sierra, Olalla; González Martín, Julián; Ruiz-Serrano, María J.; Eyene, Juan; Bouza Santiago, Emilio; García-de-Viedma, Darío
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Otros autores:
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Universitat de Barcelona |
Abstract:
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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. |
Materia(s):
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-Genòmica -Mycobacterium tuberculosis -Guinea Equatorial -Genomics -Mycobacterium tuberculosis -Equatorial Guinea |
Derechos:
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(c) Pérez-Lago, Laura et al., 2016
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Tipo de documento:
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Artículo Artículo - Versión aceptada |
Editor:
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European Society of Clinical Microbiology and Infectious Diseases
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