ESTRUCTURA GENÉTICA DE CEPAS DROGORRESISTENTES DE Mycobacterium tuberculosis EN PERÚ BASADA EN HAPLOTIPOS OBTENIDOS DE UN ENSAYO CON SONDAS EN LÍNEA

David Santos-Lazaro, Zully M. Puyen, Ronnie G. Gavilan

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

Resumen

Objective. To determine the genetic structure of drug-resistant strains of Mycobacterium tuberculosis that circulated throughout Peru during the years 2011-2015, by using haplotypes obtained from a line probe assay. Materials and methods. A total of 6589 samples that were admitted to the Instituto Nacional de Salud for routine diagnosis using the GenoType® MTBDRplus v2 assay were analyzed during the study period. Resistant haplotypes were created by concatenating 21 polymorphic sites of the evaluated genes using the line probe assay; and the association analysis was carried out with phenotypes obtained by the 7H10 agar ratio method. Results. The most frequent mutations were: RpoB S531L (55.4%) and rpoB D516V (18.5%) for rifampicin resistance, and katG S315T (59.5%) and inhA c-15t (25.7%) for isoniazid resistance. We obtained 13 representative haplotypes (87.8% of analyzed samples), 6 corresponded to the multidrug-resistant genotype, 4 to the isoniazid mono-resistant genotype and 3 to the rifampicin mono-resistant genotype. Eighteen regions and the province of Callao showed high haplotype diversity; four showed moderate diversity and two showed low diversity. Conclusions. Most regions showed high haplotype diversity; in addition, most drug-resistant strains of Mycobacterium tuberculosis were concentrated in the cities of Lima and Callao. Likewise, drugresistant Mycobacterium tuberculosis strains circulating in Peru mainly contain the genetic markers with the highest prevalence worldwide, which are associated with resistance to rifampicin and isoniazid.

Título traducido de la contribuciónGENETIC STRUCTURE OF DRUG-RESISTANT Mycobacterium tuberculosis STRAINS IN PERU BASED ON HAPLOTYPES OBTAINED FROM A LINE PROBE ASSAY
Idioma originalEspañol
Páginas (desde-hasta)577-586
Número de páginas10
PublicaciónRevista Peruana de Medicina Experimental y Salud Publica
Volumen38
N.º4
DOI
EstadoPublicada - 2021
Publicado de forma externa

Palabras clave

  • Bacterial
  • Bacterial
  • DNA
  • Drug Resistance
  • Genetic Variation
  • Genotype
  • Haplotypes
  • Molecular Diagnostic Techniques
  • Molecular Epidemiology
  • Peru
  • Point Mutation
  • Tuberculosis

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Profundice en los temas de investigación de 'ESTRUCTURA GENÉTICA DE CEPAS DROGORRESISTENTES DE Mycobacterium tuberculosis EN PERÚ BASADA EN HAPLOTIPOS OBTENIDOS DE UN ENSAYO CON SONDAS EN LÍNEA'. En conjunto forman una huella única.

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