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Sensitivities, specificities, PPV, and NPV of phenotypic methods for detection of ESBL production with molecular identification as the reference method for E. coli, K. oxytoca, and K. pneumoniae isolates (n = 104)
| Detection method | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) |
|---|---|---|---|---|
| MicroScan | 98.6 | 51.5 | 81.4 | 94.4 |
| Phoenix | 100.0 | 51.5 | 81.6 | 100.0 |
| VITEK 2 | 84.5 | 93.9 | 96.8 | 73.8 |
| DAM | 94.4 | 72.7 | 88.1 | 85.7 |
| DDS | 94.4 | 97.0 | 98.5 | 88.9 |
| Etest ESBL | 98.6 | 72.7 | 88.6 | 96.0 |
