Table 3.
Mycobacterial species isolated from instrument-positive or instrument-negative specimensa
| Mycobacterial species | No. (%) of mycobacterial isolates (n = 1,403) |
||||
|---|---|---|---|---|---|
| From instrument-positive specimens (n = 1,266) | From instrument-negative specimens (n = 137) |
||||
| From visual inspection-positive specimens (n = 79) |
From visual inspection-negative, LJ culture-positive specimens (n = 58) | All INCP isolates (n = 137) | |||
| LJ culture positive (n = 19) | LJ culture negative (n = 60) | ||||
| M. tuberculosis complex | 216 (17) | 0 | 3 (5) | 5 (9) | 8 (6) |
| Nontuberculous mycobacteria | 1,050 (83) | 19 (100) | 57 (95) | 53 (91) | 129 (94) |
| M. avium complex | 592 (56) | 7 (37) | 9 (16) | 29 (55) | 45 (35) |
| M. abscessus | 165 (16) | 0 | 0 | 2 (4) | 2 (2) |
| M. gordonae | 85 (8) | 5 (26) | 19 (33) | 7 (13) | 31 (24) |
| M. kansasii | 52 (5) | 0 | 3 (5) | 0 | 3 (2) |
| M. lentiflavum | 6 (1) | 1 (5) | 4 (7) | 3 (7) | 8 (6) |
| M. nebraskense | 1 (<1) | 0 | 8 (14) | 0 | 8 (6) |
| M. xenopi | 13 (1) | 5 (26) | 8 (14) | 0 | 13 (10) |
| M. chelonae | 9 (1) | 1 (5) | 1 (2) | 2 (4) | 4 (3) |
| M. fortuitum | 50 (5) | 0 | 0 | 1 (2) | 1 (1) |
| M. marinum | 7 (1) | 0 | 0 | 0 | 0 |
| M. mucogenicum | 0 | 0 | 0 | 2 (4) | 2 (2) |
| M. scrofulaceum | 4 (<1) | 0 | 0 | 0 | 0 |
| M. bovis BCG | 1 (<1) | 0 | 0 | 1 (2) | 1 (1) |
| NTM, NOS | 65 (6) | 0 | 5 (9) | 6 (11) | 11 (9) |
a
INCP, instrument negative, culture positive; NTM, nontuberculous mycobacteria; NOS, not otherwise specified.