Table 3.

Mean times to detection of mycobacteria and MTB in clinical specimens

MediumMean time to detection (range [days])a
MycobacteriaSmear-positive MTBSmear-negative MTB
MGIT17.0 (2–56)7.2 (2–10)19.1 (14–42)
MB Redox14.7 (2–58)6.9 (2–11)15.5 (12–33)
LJ24.6 (13–59)20.4 (13–46)25.8 (16–59)
Middlebrook-7H1120.4 (7–53)17.6 (7–27)21.6 (14–53)
  • a By ANOVA, P < 0.001. Newman-Keuls test for differences in mean times to detection of mycobacteria: MGIT versus LJ, P < 0.05 (significant); MB Redox versus LJ, P < 0.05 (significant). Newman-Keuls test for differences in mean times of detection ofM. tuberculosis: MGIT versus MB Redox versus LJ versus Middlebrook 7H11, P < 0.05 (significant). MTB,M. tuberculosis.