Antimicrobial resistance and genotyping of Mycobacterium leprae in Venezuela

Frontiers in Tropical Diseases

Tropical Diseases

Lucibel Crespo Lessmann¹  Jacobus H. de Waard²  Philip N. Suffys³  Yrneh Y. Prado Palacios³  Amanda N. Brum Fontes³  Sidra E. G. Vasconcellos³  Maria Carolina Sisco⁴  Elsa Rada⁵ 

[1] Departamento de Dermatologia, Servicio Autónomo Instituto de Biomedicina Dr. Jacinto Convit, Caracas, Venezuela;Departamento de Tuberculosis, Servicio Autónomo Instituto de Biomedicina Dr. Jacinto Convit, Caracas, Venezuela;One Health Research Group, Universidad de las Américas, Quito, Ecuador;Laboratorio de Biologia Molecular aplicada ás Micobactérias, Instituto Oswaldo Cruz. Fiocruz, Rio de Janeiro, Brazil;Laboratorio de Biologia Molecular aplicada ás Micobactérias, Instituto Oswaldo Cruz. Fiocruz, Rio de Janeiro, Brazil;Laboratorio de Pesquisa avançada em Micobactérias, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil;Sección de Leprologia, Servicio Autónomo Instituto de Biomedicina Dr. Jacinto Convit, Caracas, Venezuela;

关键词: Molecular epidemiology;    MLVA;    SNP;    drug resistance;    Mycobacterium leprae;   

DOI  :  10.3389/fitd.2023.1067439

 received in 2022-10-11, accepted in 2023-01-26,  发布年份 2023

来源: Frontiers

【 摘 要 】

Leprosy is a neglected tropical disease that leads to physical disability and social discrimination. The active surveillance of new cases and vigilance for drug resistance can decrease the incidence, and improve the clinical outcomes of people affected by it. We analyzed, with molecular biology techniques, a set of skin biopsy samples from 25 Venezuelan patients. The patients had been diagnosed with leprosy in 2014 and early 2015, and 15 were relapse cases. The samples were tested for molecular drug resistance to dapsone, rifampicin, and fluoroquinolones. In addition, we performed molecular epidemiology analysis through multiple-locus variable-number tandem repeat analysis (MLVA) and single nucleotide polymorphism (SNP) typing. We did not find evidence of drug resistance and 76% of the samples (n = 16) had isolates belonging to SNP type 3. Genotype profiles allowed us to rule out the possibility of re-infection in a patient with persistent symptoms after treatment, as well as that of household transmission in two more patients. Although our sampling is relatively small, very similar or even identical Mycobacterium leprae genotypes were observed in Miranda State. The presence of this cluster is highly suggestive of high rates of local transmission and, in turn, the need to better control this disease. Finally, the copy number distribution of minisatellite 18–8 in a considerable number of SNP type 3 strains strongly suggests the presence of a sublineage of this disease that is particular to Venezuela.

【 授权许可】

Unknown   
Copyright © 2023 Sisco, Brum Fontes, Lessmann, Rada, Prado Palacios, Vasconcellos, de Waard and Suffys