Table 2.
Sensibility and specificity to oxacillin in S. aureus samples by phenotypic and genotypic methods
| Phenotypic methods | mecA | Sensibility | Specificity | Kappa coefficient | |
|---|---|---|---|---|---|
| Positive | Negative | ||||
| N = 72 | N = 63 | % | % | k (interpretation) | |
| Oxacillin (10 µg) | 13 | 10 | 18.0 | 84.1 |
0.02 Non-concordance |
| Cefoxitin (30 µg) | 17 | 11 | 23.6 | 82.5 |
0.07 Non-concordance |
| Screeninga | 26 | 18 | 36.1 | 82.5 |
0.35 Satisfactory concordance |
N: number of S. aureus; k: Kappa coefficient
aOxacillin (6 μg/ml) and NaCl (4%)-enriched Mueller–Hinton Agar