Table 1.
Comparison of results from the three different culture systems in the analysis of sputum samples from 565 patients with suspected pulmonary tuberculosis
|
Sputum samples |
||||
|---|---|---|---|---|
| M-MGIT | A-MGIT | L-J | All systems | |
| Total processed | 565 | 565 | 565 | 565 |
| Positive growth | 237(41.9) | 243 (43.0) | 190 (33.6) | 259 (45.8) |
| MTC | 222 (39.3) | 227 (40.2) | 179 (31.7) | 241 (42.6) |
| NTM | 15 (2.6) | 16 (2.8) | 11 (1.9) | 18 (3.2) |
| Contaminated | 33 (5.8) | 35 (6.2) | 15 (2.7) | 8 (1.4)† |
| Negative | 295 (52.3) | 287 (50.8) | 360 (63.7) | 298 (52.8)† |
Data are presented as n or n (%).
†Contaminated or negative on all three media
M-MGIT™, manual Mycobacterial Growth Indicator Tube; A-MGIT, automated Mycobacterial Growth Indicator Tube (BACTEC™ MGIT™ 960); L-J, Löwenstein-Jensen culture method, MTC, Mycobacterium tuberculosis complex; NTM, non-tuberculous mycobacteria