TABLE 2.
Mycobacterial detection by MGIT versus line probe assays
| Sample type | MGIT results (n [%]) |
Total | ||||||
|---|---|---|---|---|---|---|---|---|
| M. tuberculosis present | NTM only | MAC or M. kansasii | Other NTM only | Contaminated | No mycobacterial growth | Not available | ||
| MTBDR-plus LPA results | ||||||||
| M. tuberculosis present | 306 (80.7) | 0 | 6 (22.2) | 0 | 3 (33.3) | 315 | ||
| No M. tuberculosis present | 66 (17.4) | 14 (100.0) | 21 (77.8) | 209 (99.5) | 4 (44.4) | 314 | ||
| Not available | 7 (1.8) | 0 | 0 | 1 (0.5) | 2 (22.2) | 10 | ||
| Total | 379 (100.0) | 14 (100.0) | 27 (100.0) | 210 (100.0) | 9 (100.0) | 639 | ||
| Direct LPA results | 0 | |||||||
| M. tuberculosis present | 334a (88.1) | 0 | 6 (22.2) | 12 (5.7) | 3 (33.3) | 355 | ||
| MAC or M. kansasii | 0 | 5 (50.0) | 1 (25.0) | 0 | 1 (0.5) | 0 | 7 | |
| Indeterminate | 3 (0.8) | 0 | 0 | 0 | 2 (1.0) | 2 (22.2) | 7 | |
| No mycobacteria present | 36 (9.5) | 5 (50.0) | 3 (75.0) | 21 (77.8) | 194 (92.4) | 2 (22.2) | 261 | |
| Not available | 6 (1.6) | 0 | 0 | 0 | 1 (0.5) | 2 (22.2) | 9 | |
| Total | 379 (100.0) | 10 (100.0) | 4 (100.0) | 27 (100.0) | 210 (100.0) | 9 (100.0) | 639 | |
a
M. tuberculosis and MAC were detected in 3 out of the 334 specimens by Direct LPA.