Detection of multidrug-resistant Mycobacterium tuberculosis strains isolated in Brazil using a multimarker genetic assay for katG and rpoB genes oleh Luita Nice Café Oliveira, Jairo da Silva Muniz-Sobrinho, Luiz Alexandre Viana-Magno, Sônia Cristina Oliveira Melo, Antonio Macho, Fabrício Rios-Santos