Table 1.

Recovery of M. tuberculosis and NTM from 742 respiratory specimens cultured on LJ medium and in MB Redox

Mycobacterial species (n)No. (%) of specimens with positive culture ina:
LJ mediumMB RedoxBoth
M. tuberculosis(20)17 (85)* 19 (95)* 16 (80)
 AFB positive (8)888
 AFB negative (12)9118
NTM (24 [100%])20 (83)** 18 (75)** 14 (58)
M. kansasii (7)553
M. avium complex (4)422
M. xenopi (3)232
M. gordonae (5)433
M. fortuitum (1)111
M. chelonae/abscessus (3)232
 Undetermined (1)111
Total (44)37 (84)37 (84)30 (68)
  • a *, P = 0.59; **, P = 0.48.