Table 3 Performance of the three automated identification systems in detection of carbapenemase production in the CRE isolates of this study
Automated systems | AES positive/negative | No. of isolates with carbapenem resistance mechanism | Sensitivity (%) | Specificity (%) | |
|---|---|---|---|---|---|
Carbapenemase (n = 48) | Noncarbapenemase (n = 33) | ||||
Phoenix100 | Positive | 26 | 11 | 54.2 | 66.7 |
Negative | 22 | 22 | Â | Â | |
Vitek-2 compact | Positive | 36 | 21 | 75.0 | 36.4 |
Negative | 12 | 12 | Â | Â | |
WalkAway 96 plus | Positive | 45 | 19 | 93.8 | 42.4 |
Negative | 3 | 14 | Â | Â | |