Figure 2.

Effect of the efflux inhibitors on the accumulation (A) and efflux (B) of ethidium bromide at 0.5 μg/ml by M. tuberculosis FURG-5, as an example. Assays were performed at 37°C in the presence of glucose. Concentrations of verapamil (VP), thioridazine (TZ), chlorpromazine (CPZ) are at ½ their MIC (Table 3). EtBr, ethidium bromide.