Table 1.
Amoxicillin susceptibility in the presence of 15 μg ml−1 clavulanic acid among the 138 methicillin-resistant Staphylococcus epidermidis BPH0662 clone, ST2-mixed, ST5, and ST23 isolates from Australia, Denmark, and Germany
| Phenotype, %a | ||
|---|---|---|
| Resistant | Susceptible | |
| Lineage | ||
| BPH0662 clone (n = 58) | 90% (n = 52) | 10% (n = 6) |
| ST2-mixed (n = 42) | 21% (n = 9) | 79% (n = 33) |
| ST5 (n = 6) | 17% (n = 1) | 83% (n = 5) |
| ST23 (n = 32) | 16% (n = 5) | 84% (n = 27) |
| Genotype | ||
| R2 (n = 77) | 78% (n = 60) | 22% (n = 17) |
| S2/S3 (n = 61) | 11% (n = 7) | 89% (n = 54) |
aIsolates were deemed phenotypically resistant or susceptible to amoxicillin in the presence of 15 μg ml−1 clavulanic acid if they had minimum inhibitory concentrations above or at/below the empirical epidemiological cut-off (4.0 μg ml−1), respectively.