TABLE 4.

Accuracy of BACTEC MGIT 960 compared with that of BACTEC 460 TB system after resolution of discrepanciesa

Drug (concn in μg/ml)Sensitivity (%)Specificity (%)PPV (%)NPV (%)
INH (0.1)10096.489.7100
INH (0.4)10097.791.7100
RIF (1.0)100100100100
EMB (5.0)10096.981.3100
EMB (7.5)10098.080100
STR (1.0)10090.576.5100
STR (4.0)10089.881.2100
  • a PPV, positive predictive value; NPV, negative predictive value.