Correlation between the BACTEC MGIT 960 culture system with Genotype MTBDRplus and TB-SPRINT in multidrug resistant Mycobacterium tuberculosis clinical isolates from Brazil.
Nayanne Gama Teixeira Dantas, Phillip Noel Suffys, Wânia da Silva Carvalho, Harrison Magdinier Gomes, Isabela Neves de Almeida, Lida Jouca de Assis Figueiredo, Alan Douglas Gonçalves, Michel Kireopori Gomgnimbou, Guislaine Refregier, Christophe Sola, Silvana Spíndola de Miranda
Author Information
Nayanne Gama Teixeira Dantas: Universidade Federal de Minas Gerais, Faculdade de Medicina, Departamento de Clínica Médica, Programa de Pós-Graduação em Infectologia e Medicina Tropical, Belo Horizonte, MG, Brasil.
Phillip Noel Suffys: Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Biologia Molecular Aplicada a Micobactéria, Rio de Janeiro, RJ, Brasil.
Wânia da Silva Carvalho: Universidade Federal de Minas Gerais, Faculdade de Farmácia, Departamento de Farmácia Social, Laboratório de Biologia Molecular e Saúde Pública, Belo Horizonte, MG, Brasil.
Harrison Magdinier Gomes: Fundação Oswaldo Cruz-Fiocruz, Instituto Oswaldo Cruz, Laboratório de Biologia Molecular Aplicada a Micobactéria, Rio de Janeiro, RJ, Brasil.
Isabela Neves de Almeida: Universidade Federal de Minas Gerais, Faculdade de Medicina, Departamento de Clínica Médica, Programa de Pós-Graduação em Infectologia e Medicina Tropical, Belo Horizonte, MG, Brasil.
Lida Jouca de Assis Figueiredo: Universidade Federal de Minas Gerais, Faculdade de Farmácia, Departamento de Farmácia Social, Laboratório de Biologia Molecular e Saúde Pública, Belo Horizonte, MG, Brasil.
Alan Douglas Gonçalves: Fundação Ezequiel Dias, Belo Horizonte, MG, Brasil.
Michel Kireopori Gomgnimbou: Centre Muraz, Bobo-Dioulasso, Burkina Faso.
Guislaine Refregier: Institut for Integrative Cell Biology, UMR9198 CEA-CNRS-UPSaclay, Orsay, France.
Christophe Sola: Institut for Integrative Cell Biology, UMR9198 CEA-CNRS-UPSaclay, Orsay, France.
Silvana Spíndola de Miranda: Universidade Federal de Minas Gerais, Faculdade de Medicina, Departamento de Clínica Médica, Programa de Pós-Graduação em Infectologia e Medicina Tropical, Belo Horizonte, MG, Brasil.
BACKGROUND: The accurate detection of multidrug-resistant tuberculosis (MDR-TB) is critical for the application of appropriate patient treatment and prevention of transmission of drug-resistant Mycobacterium tuberculosis isolates. The goal of this study was to evaluate the correlation between phenotypic and molecular techniques for drug-resistant tuberculosis diagnostics. Molecular techniques used were the line probe assay genotype MTBDRplus and the recently described tuberculosis-spoligo-rifampin-isoniazid typing (TB-SPRINT) bead-based assay. Conventional drug susceptibility testing (DST) was done on a BACTECTM MGIT 960 TB. METHOD: We studied 80 M. tuberculosis complex (MTC) clinical isolates from Minas Gerais state, of which conventional DST had classified 60 isolates as MDR and 20 as drug susceptible. FINDINGS: Among the 60 MDR-TB isolates with MGIT as a reference, sensitivity, specificity, accuracy, and kappa for rifampicin (RIF) resistance using TB-SPRINT and MTBDRplus, were 96.7% versus 93.3%, 100.0% versus 100.0%, 97.5% versus 95.0% and 0.94 versus 0.88, respectively. Similarly, the sensitivity, specificity, accuracy, and kappa for isoniazid (INH) resistance were 85.0% and 83.3%, 100.0% and 100.0%, 88.8% and 87.5% and 0.74 and 0.71 for both tests, respectively. Finally, the sensitivity, specificity, accuracy, and kappa for MDR-TB were 85.0% and 83.3%, 100.0% and 100.0%, 88.8% and 87.5% and 0.74 and 0.71 for both tests, respectively. MAIN CONCLUSIONS: Both methods exhibited a good correlation with the conventional DST. We suggest estimating the cost-effectiveness of MTBDRplus and TB-SPRINT in Brazil.
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