TABLE 2.
Vitek MS v3.0 library performance for identifying Mycobacterium spp. in liquid medium
| Reference IDa | No. (%) of isolates with indicated Vitek MS v3.0 ID results according to identification category (confidence value) |
|||
|---|---|---|---|---|
| Excellent (≥99.9%) | Good (60.0–<99.9%) | No ID (<60.0%) | Mis-ID | |
| NTM slow growers | ||||
| M. avium complex | ||||
| M. avium (n = 75) | 51 (68) | 9 (12) | 15 (20) | |
| M. intracellulare (n = 271) | 203 (67.2) | 21 (7.7) | 68 (25.1) | |
| MAC-Xc (n = 36) (includes but may not discriminate among M. colombiense*, M. marseillense*, M. timonense*, M. chimaera*, and M. yongonense*) | 11 (30.6) | 25 (69.4) | ||
| M. angelicum* (n = 2) | 2 (100) | |||
| M. asiaticum (n = 2) | 2 (100) | |||
| M. gordonae (n = 17) | 11 (64.7) | 1 (5.9) | 5 (29.4) | |
| M. interjectum* (n = 1) | 1 (100) | |||
| M. kansasii (n = 111) | 80 (72.1) | 8 (7.2) | 23 (20.7) | |
| M. lentiflavum (n = 3) | 3 (100) | |||
| M. mantenii (n = 1) | 1 (100) | |||
| M. parascrofulaceum* (n = 6) | 1 (16.7) | 5 (83.3) | ||
| M. seoulense* (n = 1) | 1 (100) | |||
| M. shigaense* (n = 1) | 1 (100) | |||
| M. szulgai (n = 3) | 3 (100) | |||
| M. triplex (n = 2) | 2 (100) | |||
| M. xenopi (n = 7) | 2 (28.6) | 5 (71.4) | ||
| NTM rapid growers | ||||
| M. abscessus (n = 284) | 244 (85.9) | 9 (3.6) | 31 (10.9) | |
| M. chelonae (n = 5) | 4 (80) | 1 (20) | ||
| M. fortuitum group (n = 23) (includes but does not discriminate between M. porcinum, M. peregrinum, and M. septicum*) | 18 (78.3)b | 5 (21.7) | ||
| M. monacense* (n = 2) | 2 (100) | |||
| M. neoaurum (n = 1) | 1 (100) | |||
| M. wolinskyi* (n = 1) | 1 (100) | |||
| Total (n = 855) | 610 (71.4) | 48 (5.6) | 192 (22.4) | 5 (0.6) |
a
Species not included in the bioMérieux Vitek MS v3.0 database are indicated by asterisks. ID, identification.
b
Identification results correct to complex or group level.
c
MAC-X includes M. chimaera, M. colombiense, M. arosiense, M. vulneris, M. bouchedurhonense, M. marseillense, M. timonense, M. paraintracellulare, and M. yongonense.