TABLE 2.
Comparison of results obtained by the Capilia TB assay, the niacin strip test, and the GTM-CM assay for Zambia and South Africa
| Mycobacterial species (no. of isolates identified by the GTM-CM assay) | No. of isolates |
||||
|---|---|---|---|---|---|
| Capilia TB assay |
Niacin strip test |
||||
| Positive | Negative | Positive | Negative | No growth | |
| M. tuberculosis complex (224) | 223 | 1 | 193 | 26 | 4 |
| M. intracellulare (177) | 177 | 6 | 132 | 36 | |
| M. scrofulaceum (35) | 35 | 2 | 28 | 5 | |
| M. fortuitum (35) | 35 | 6 | 26 | 3 | |
| M. gordonae (11) | 1 | 10 | 1 | 10 | |
| M. interjectum (7) | 7 | 5 | 2 | ||
| M. peregrinum (5) | 5 | 2 | 3 | ||
| M. kansasii (2) | 2 | 2 | |||
| M. malmoense (1) | 1 | 1 | |||
| M. avium (3) | 3 | 2 | 1 | ||
| M. abscessus (1) | 1 | 1 | |||
| Unidentified NTM (115)a | 1 | 114 | 18 | 79 | 18 |
| Mixed cultures | |||||
| M. tuberculosis and M. intracellulare (1) | 1 | 1 | |||
| M. fortuitum and unidentified NTM (5) | 5 | 1 | 4 | ||
| M. peregrinum and unidentified NTM (1) | 1 | 1 | |||
a
NTM groups identified by the GTM-CM: Mycobacterium avium, M. chelonae, M. abscessus, M. fortuitum, M. gordonae, M. intracellulare, M. scrofulaceum, M. kansasii, M. malmoense, M. marinum, the M. tuberculosis complex, M. peregrinum, M. xenopi, and M. interjectum.