Table 2.
Percentage and number of essential or categorical errors for the three methods evaluated in this study according to the reading time for the 46 studied isolates using ADM as reference method. EA: essential agreement; CA: categorical agreement; mE: minor error; ME: major error; VME: very major error.
| Molecules | No. of Isolates in Each Category | EA % (n) | CA % (n) | mE % (n) | ME % (n) | VME % (n) | EA % (n) | CA % (n) | mE % (n) | ME % (n) | VME % (n) | EA % (n) | CA % (n) | mE % (n) | ME % (n) | VME % (n) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S | I | R | MICRONAUT-S Anaerobe MIC (24 h) | Sensititre Anaerobe MIC (24 h) | MIC Test Strip (24 h) | |||||||||||||
| Penicillin G | 29 | 9 | 8 | 76.1 (35) | 69.6 (32) | 26.1% (12) | 0% (0) | 25% (2) | - | - | - | - | - | 82.6% (38) | 82.6% (38) | 15.2% (7) | 0% (0) | 12.5% (1) |
| Piperacillin/tazobactam | 46 | 0 | 0 | 87% (40) | 100% (46) | - | 0% (0) | - | - | - | - | - | - | 71.7% (33) | 100% (46) | - | 0% (0) | - |
| Metronidazole | 46 | - | 0 | 69.6% (32) | 97.8% (45) | - | 2.2% (1) | - | - | - | - | - | - | 60.8% (28) | 95.65% (44) | - | 4.35% (2) | - |
| Clindamycin | 39 | - | 7 | 63% (29) | 84.8% (39) | - | 10.3% (4) | 42.9% (3) | - | - | - | - | - | 65.2% (30) | 87.9% (40) | - | 10.2% (4) | 28.6% (2) |
| Tigecycline | - | - | - | 80.8% (38) | - | - | - | - | - | - | - | - | - | 71.7% (33) | - | - | - | - |
| Vancomycin | 34 | - | 12 | 95.7% (44) | 93.4% (43) | - | 0%(0) | 25% (3) | - | - | - | - | - | 97.9% (45) | 97.9% (45) | - | 0%(0) | 8.33% (1) |
| S | I | R | MICRONAUT-S Anaerobe MIC (48 h) | Sensititre Anaerobe MIC (48 h) | MIC Test Strip (48 h) | |||||||||||||
| Penicillin G | 29 | 6 | 11 | 71.7% (33) | 76.1% (35) | 19.5% (9) | 0% (0) | 18.2% (2) | 87% (40) | 82.6% (38) | 15.2% (7) | 0% (0) | 9.1% (1) | 76.1% (35) | 84.8% (39) | 13.0% (6) | 0% (0) | 9.1% (1) |
| Piperacillin/tazobactam | 44 | 2 | 0 | 91.3% (42) | 95.6% (44) | 4.35% (2) | 0% (0) | - | 91.3% (42) | 97.8% (45) | 2.13% (1) | 0% (0) | - | 69.1% (32) | 95.6% (44) | 4.35% (2) | 0% (0) | - |
| Metronidazole | 46 | - | 0 | 69.6% (32) | 97.8% (45) | - | 2.2% (1) | - | 43.5% (20) | 95.6% (44) | - | 4.35% (2) | - | 71.7% (33) | 95.6% (44) | - | 4.35% (2) | - |
| Clindamycin | 32 | - | 14 | 84.7% (39) | 82.6% (38) | - | 12.5% (4) | 28.6% (4) | 87% (40) | 89.1% (41) | - | 6.25% (2) | 21.4% (3) | 76.1% (35) | 80.4% (37) | - | 6.25% (2) | 50% (7) |
| Tigecycline | - | - | - | 82.6% (38) | - | - | - | - | 93.4% (43) | - | - | - | - | 65.2% (30) | - | - | - | - |
| Vancomycin | 34 | - | 12 | 97.8% (45) | 97.8% (45) | - | 0%(0) | 8.33% (1) | 97.9% (45) | 93.4% (43) | - | 0% (0) | 25% (3) | 97.9% (45) | 97.9% (45) | - | 0% (0) | 8.33% (1) |