TABLE 4.
Vitek MS performance for identifying RGM and SGM at different MGIT report-positive days
| Organism(s)a | Avg report-positive days | No. (%) of isolates identified at different MGIT report-positive days |
|||||
|---|---|---|---|---|---|---|---|
| Total | 0 < d ≤ 6 | 6 < d ≤ 11 | 11 < d ≤ 16 | 16 < d ≤ 21 | d > 21 | ||
| RGM | |||||||
| M. abscessus | 5.57 ± 3.85 | 253/284 (89.08%) | 202/225 (89.78) | 29/35 (82.86) | 13/14 (92.86) | 7/7 (100) | 2/3 (66.67) |
| M. chelonae | 11.62 ± 4.33 | 4/5 (80) | 0 | 3/3 (100) | 1/1 (100) | 0/1 (0) | 0 |
| M. fortuitum group | 7.72 ± 5.75 | 18/23 (78.26) | 10/13 (76.92) | 4/6 (66.67) | 2/2 (100) | 0 | 2/2 (100) |
| M. fortuitum | 6.67 ± 4.62 | 11/15 (73.33) | 8/10 (80) | 1/3 (33.33) | 1/1 (100) | 0 | 1/1 (100) |
| M. peregrinum | 7.77 ± 1.15 | 2/2 (100) | 0 | 2/2 (100) | 0 | 0 | 0 |
| M. porcinum | 9.99 ± 9.04 | 4/4 (100) | 2/2 (100) | 1/1 (100) | 0 | 0 | 1/1 (100) |
| M. septicum* | 10.27 ± 3.90 | 1/2 (50) | 0/1 (0) | 0 | 1/1 (100) | 0 | 0 |
| M. monacense* | 4.38 ± 5.42 | 0/2 (0) | 0/1 (100) | 0/1 (100) | 0 | 0 | 0 |
| M. neoaurum | 6.04 | 1/1 (100) | 0 | 1/1 (100) | 0 | 0 | 0 |
| M. wolinskyi* | 5.67 | 0/1 (0) | 0/1 (0) | 0 | 0 | 0 | 0 |
| Identification rate | 5.82 ± 4.11 | 276/316 (87.34) | 212/240 (88.33) | 37/46 (80.43) | 16/17 (94.12) | 7/8 (87.5) | 4/5 (80) |
| Identification rateb | 6.04 ± 3.90 | 275/311 (88.42) | 212/237 (89.45） | 37/45 (82.22) | 15/16 (93.75) | 7/8 (87.5) | 4/5 (80) |
| SGM | |||||||
| M. avium complex | |||||||
| M. avium | 11.63 ± 7.05 | 60/75 (80.0) | 11/18 (61.12) | 18/20 (90) | 23/27 (85.19) | 5/6 (83.33) | 3/4 (75) |
| M. intracellulare | 8.73 ± 5.85 | 203/271 (74.91) | 82/124 (66.13) | 63/77 (81.82) | 39/46 (84.78) | 8/13 (61.54) | 11/11 (100) |
| MAC-X* | 12.81 ± 7.40 | 11/36 (30.55) | 2/6 (33.33) | 4/12 (33.33) | 3/11 (27.27) | 1/2 (50) | 1/5 (20) |
| M. chimaera* | 22.33 ± 17.32 | 0/2 (0) | 0 | 0/1 (0) | 0 | 0 | 0/1 (0) |
| M. colombiense* | 11.72 ± 2.85 | 1/5 (20) | 0 | 1/2 (50) | 0/3 (0) | 0 | 0 |
| M. marseillense* | 13.16 ± 8.31 | 10/26 (38.46) | 2/6 (33.3) | 3/6 (20) | 3/8 (37.5) | 1/2 (50) | 1/4 (25) |
| M. timonense* | 9.33 ± 0.24 | 0/2 (0) | 0 | 0/2 (0) | 0 | 0 | 0 |
| M. yongonense* | 7.96 | 0/1 (0) | 0 | 0/1 (0) | 0 | 0 | 0 |
| M. angelicum* | 4.4 ± 0.21 | 0/2 (0) | 0/2 (0) | 0 | 0 | 0 | 0 |
| M. asiaticum | 21.77 ± 6.69 | 0/2 (0) | 0 | 0 | 0 | 0/1 (0) | 0/1 (0) |
| M. gordonae | 18.74 ± 8.63 | 12/17 (70.59) | 0/1 (0) | 1/1 (100) | 5/8 (62.5) | 1/2 (50) | 5/5 (100) |
| M. interjectum* | 15.08 | 0/1 (0) | 0 | 0 | 0/1 (0) | 0 | 0 |
| M. kansasii | 12.19 ± 6.67 | 88/111 (79.28) | 16/20 (80) | 28/38 (73.68) | 19/23 (82.61) | 14/17 (82.35) | 11/13 (84.62) |
| M. lentiflavum | 30.35 ± 5.69 | 2/3 (66.7） | 0 | 0 | 0 | 0 | 2/3 (66.67) |
| M. mantenii* | 23.21 | 0/1 (0) | 0 | 0 | 0 | 0 | 0/1 (0) |
| M. parascrofulaceum* | 25.55 ± 9.53 | 0/6 (0) | 0 | 0/1 (100) | 0 | 0 | 0/5 (0) |
| M. seoulense* | 20.75 | 0/1 (0) | 0 | 0 | 0 | 0/1 (0) | 0 |
| M. shigaense* | 31.04 | 0/1 (0) | 0 | 0 | 0 | 0 | 0/1 (0) |
| M. szulgai | 13.32 ± 10.60 | 3/3 (100) | 0 | 2/2 (100) | 0 | 0 | 1/1 (100) |
| M. triplex | 8.13 ± 0.29 | 0/2 (0) | 0 | 0/2 (0) | 0 | 0 | 0 |
| M. xenopi | 24.28 ± 17.29 | 2/7 (28.57) | 1/2 (50) | 1/1 (100) | 0 | 0 | 0/4 (0) |
| Identification rate | 11.12 ± 7.66 | 381/539 (70.69) | 112/173 (64.74) | 117/154 (75.97) | 89/116 (76.72) | 29/42 (69.05) | 34/54 (62.96) |
| Identification rateb | 10.85 ± 6.52 | 370/491 (75.36) | 110/165 (66.67) | 113/141 (80.14) | 86/104 (82.69) | 28/39 (71.79) | 33/42 (78.57) |
a
Species not included in the bioMérieux Vitek MS v3.0 database are indicated by asterisks.
b
Identification rate after excluding species not in the bioMérieux Vitek MS database.