OBJECTIVES The purpose of this study was to determine the levels of isoniazid and ethionamide resistance and to identify associated mutations in endemic multidrug-resistant (MDR) strains of Mycobacterium tuberculosis from the Lisbon metropolitan area, Portugal. METHODS Seventeen clinical MDR tuberculosis (TB) strains were characterized by standard and semi-quantitative drug susceptibility tes...

We present the first comprehensive analysis of Mycobacterium tuberculosis isolates circulating in the Kaohsiung region of southern Taiwan. The major spoligotypes found in the 224 isolates studied were Beijing lineages (n = 97; 43.3%), EAI lineages (n = 72; 32.1%) and Haarlem lineages (n = 18; 8.0%). By 24 MIRU-VNTR typing, 174 patterns were identified, including 24 clusters of 74 isolates and 1...

The current study evaluated Mycobacterium tuberculosis isolates from Rio de Janeiro, Brazil, for genomic deletions. One locus in our panel of PCR targets failed to amplify in approximately 30% of strains. A single novel long sequence polymorphism (>26.3 kb) was characterized and designated RD(Rio). Homologous recombination between two similar protein-coding genes is proposed as the mechanism fo...

Background Understanding regional molecular epidemiology allows for the development of more efficient tuberculosis prevention strategies in low-incidence settings. Methods We analyzed 24-locus mycobacterial interspersed repetitive-unit-variable-number tandem repeat (MIRU-VNTR) genotyping for 2290 Mycobacterium tuberculosis clinical isolates collected in the province of British Columbia (BC), ...

Multitarget genotyping of the etiologic agent Mycobacterium avium subsp. paratuberculosis is necessary for epidemiological tracing of paratuberculosis (Johne's disease). The study was undertaken to assess the informative value of different typing techniques and individual genome markers by investigation of M. avium subsp. paratuberculosis transmission between wild-living red deer and farmed cat...

Canada has one of the lowest rates of tuberculosis (TB) in the world, however, among certain sub-populations, disease incidence rates approach those observed in sub-Saharan Africa, and other high incidence regions. In this study, we applied mycobacterial interspersed repetitive unit (MIRU) variable number of tandem repeat (VNTR) and whole genome sequencing (WGS) to the analysis of Mycobacterium...

Abstract Background Tuberculosis remains a serious public health concern globally. The enormous social, economic, and impacts of the diseases are attributed to lack updated data on prevalence, geospatial distribution, population structures, genotypic variants circulating M. tuberculosis . Methods Structured questionnaire, mycobacterial culture, standard 24-Mycobacterial Interspersed Repeated Un...

This study was performed to investigate the role of dysglycemia on genetic diversity Mycobacterium tuberculosis (MTB) among pulmonary (TB) patients build scientific evidence about possible mechanisms TB transmission. MTB isolates obtained affected by from health care facilities North Lima—Peru, were analyzed using whole genome sequencing and 24-locus mycobacterial interspersed repetitive-unit -...