Fig. 1

Venn diagram of routine and study specimens showing proportion with documented MDR-TB, and details of INH and RIF drug susceptibility testing. Legend: Drug susceptibility testing was performed by molecular and/or phenotypic methods. Of 280 participants providing on-treatment sputum specimens, MTB was not identified in 133 and so DST could not be performed, MTB was identified but no RIF DST was performed in 2, and MTB was identified and RIF DST was performed in 145 participants. The area of circles are proportional to the frequencies