The M. tuberculosis Beijing genotype varies in prevalence in different regions of China and is solely associated with RMP resistance.

MYCOTB is a rapid, convenient, quantitative and accurate method for testing both first- and second-line anti-tuberculosis drugs.

Eight (66.7%) participating laboratories met the set requirement criteria; however, DST in four (33.3%) laboratories requires greater attention. Of the four drugs tested, the results for KM were lower than those for the other drugs. External quality assessment can lead to effective evaluation of laboratory performance in SL DST.