TABLE 2.
Phenotypical drug susceptibility testing results for amikacin, capreomycin, rifabutin, and linezolida
| Drug | 7H10 result (no. of isolates) | No. of isolates with indicated MGIT960 result |
Concordance (%) | |
|---|---|---|---|---|
| S | R | |||
| Amikacin | S (21) | 21 | 0 | 100 |
| R (8) | 0 | 8 | ||
| Capreomycin | S (22) | 21 | 1b | 97 |
| R (7) | 0 | 7 | ||
| Rifabutin | S (14) | 14 | 0 | 100 |
| R (15) | 0 | 15 | ||
| Linezolid | S (29) | 29 | 0 | 100 |
a
S, susceptible; R, resistant; 7H10, Middlebrook 7H10 agar dilution method; MGIT960, mycobacterium growth indicator tube.
b
This strain harbored the A1401G rrs mutation, favoring the MGIT960 result and a “resistant” designation.