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Genomic-based surveillance reveals high ongoing transmission of multi-drug-resi...
Salvato, Richard Steiner; Reis, Ana Júlia; Schiefelbein, Sun Hee; Gómez, Michael Andrés Abril; Salvato, Stéphanie Steiner; da Silva, Larissa VitóriaFunding Information: Funding: This study was funded, in part, by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (Grant No. 001) and supported by Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (Grant No. 17/1265–8 INCT-TB). JP is supported by Fundação para a Ciência e Tecnologia through Estímulo Individual ao Emprego Científico (CEECIND/00394/2017). Funding Information: Th...
Detection of drug resistant mycobacterium tuberculosis strains using kit SIRE n...
de Miranda, Silvana Spindola; de Almeida, Isabela Neves; de Fátima Filardi Oliveira Mansur, Maria; de Assis Figueredo, Lida Jouca(1) Background: The Commercial Kit SIRE Nitratase® PlastLabor, is a drug susceptibility test kit used to detect Mycobacterium tuberculosis resistance to first-line TB treatment drugs. The present study aimed at evaluating its performance in a multicenter study. (2) Methods: To determine its accuracy, the proportion methods in Lowenstein Jensen medium or the BACTECTMMGITTM960 system was used as a gold standard. ...
The contribution of efflux pumps in Mycobacterium abscessus complex resistance ...
Vianna, Júlia S; Machado, Diana; Ramis, Ivy B; Silva, Fábia P; Bierhals, Dienefer V; Abril, Michael Andrés; von Groll, Andrea; Ramos, Daniela FThe basis of drug resistance in Mycobacterium abscessus is still poorly understood. Nevertheless, as seen in other microorganisms, the efflux of antimicrobials may also play a role in M. abscessus drug resistance. Here, we investigated the role of efflux pumps in clarithromycin resistance using nine clinical isolates of M. abscessus complex belonging to the T28 erm(41) sequevar responsible for the inducible res...
Interplay between mutations and efflux in drug resistant clinical isolates of m...
Machado, Diana; Coelho, Tatiane S; Perdigão, João; Pereira, Catarina; Couto, Isabel; Portugal, Isabel; Maschmann, Raquel De Abreu; Ramos, Daniela FNumerous studies show efflux as a universal bacterial mechanism contributing to antibiotic resistance and also that the activity of the antibiotics subject to efflux can be enhanced by the combined use of efflux inhibitors. Nevertheless, the contribution of efflux to the overall drug resistance levels of clinical isolates of Mycobacterium tuberculosis is poorly understood and still is ignored by many. Here, we ...