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BACKGROUND Drug-resistant tuberculosis threatens efforts to control the disease. This report describes the prevalence of resistance to four first-line drugs in 35 countries participating in the World(More)
BACKGROUND Data on global trends in resistance to antituberculosis drugs are lacking. METHODS We expanded the survey conducted by the World Health Organization and the International Union against(More)
In a large multicenter study involving six major study sites in the United States, Canada, and Europe, the susceptibilities of 272 Mycobacterium tuberculosis strains to classical second-line(More)
SETTING Quality assurance of the WHO/IUATLD global tuberculosis drug resistance surveillance programme. OBJECTIVE To perform a proficiency test of drug susceptibility procedures within the(More)
SETTING Quality assurance for the WHO/IUATLD Global Tuberculosis Drug Resistance Surveillance Programme. OBJECTIVE To implement an ongoing proficiency-testing programme for drug susceptibility(More)