TABLE 2.
Interpretive agreement between results of voriconazole disk diffusion tests and of standard 48-h BMDa
| Organism (no. tested) | Test methodc | % of results in each categoryb
|
% Agreementd | % Errors
|
||||
|---|---|---|---|---|---|---|---|---|
| S | SDD | R | VME | ME | M | |||
| C. albicans (1,630) | Ref.-MIC | 100.0 | 0.0 | 0.0 | ||||
| Ref.-disk | 99.8 | 0.1 | 0.1 | 99.8 | 0.0 | 0.1 | 0.1 | |
| Part.-disk | 98.2 | 0.1 | 1.7 | 98.2 | 0.0 | 1.7 | 0.1 | |
| C. glabrata (402) | Ref.-MIC | 96.3 | 1.5 | 2.2 | ||||
| Ref.-disk | 96.0 | 0.3 | 3.7 | 97.3 | 0.5 | 0.5 | 1.7 | |
| Part.-disk | 84.1 | 7.2 | 8.7 | 84.8 | 0.5 | 6.0 | 8.7 | |
| C. parapsilosis (399) | Ref.-MIC | 99.5 | 0.25 | 0.25 | ||||
| Ref.-disk | 99.0 | 0.8 | 0.2 | 99.0 | 0.0 | 0.0 | 1.0 | |
| Part.-disk | 91.7 | 3.8 | 4.5 | 92.0 | 0.0 | 4.0 | 4.0 | |
| C. tropicalis (325) | Ref.-MIC | 99.7 | 0.0 | 0.3 | ||||
| Ref.-disk | 98.2 | 0.9 | 0.9 | 97.9 | 0.3 | 0.9 | 0.9 | |
| Part.-disk | 85.8 | 5.9 | 8.3 | 85.5 | 0.3 | 8.3 | 5.9 | |
| C. krusei (85) | Ref.-MIC | 100.0 | 0.0 | 0.0 | ||||
| Ref.-disk | 98.8 | 1.2 | 0.0 | 98.8 | 0.0 | 0.0 | 1.2 | |
| Part.-disk | 89.4 | 5.9 | 4.7 | 89.4 | 0.0 | 4.7 | 5.9 | |
| All Candida species (2,934) | Ref.-MIC | 99.4 | 0.2 | 0.4 | ||||
| Ref.-disk | 98.9 | 0.4 | 0.7 | 99.0 | 0.1 | 0.2 | 0.7 | |
| Part.-disk | 94.0 | 2.1 | 3.9 | 94.1 | 0.1 | 3.4 | 2.4 | |
Voriconazole disk diffusion testing was performed according to CLSI method M44-A, and voriconazole BMD MIC testing was performed according to CLSI method M27-A2.
Voriconazole susceptibility categories are as follows: S, susceptible (MIC of ≤1 μg/ml, zone diameter of ≥17 mm); SDD, susceptible dose dependent (MIC of 2 μg/ml, zone diameter of 14 to 16 mm); R, resistant (MIC of ≥4 μg/ml, zone diameter of ≤13 mm).
Ref.-MIC, MIC testing performed by ARTEMIS reference laboratory; Ref.-disk, disk testing performed by ARTEMIS reference laboratory; Part.-disk, disk testing performed by ARTEMIS participants.
Percent categorical agreement between disk diffusion and MIC test results.