S. aureusisolate | Cefoxitin MIC (μg/ml) | Cefoxitin AS* | Cefepime MIC (μg/ml) | Cefepime AS** |
|---|
#1 | 3.0 ± 0.0 | S | 3.3 ± 0.3 | S |
#2 | 2.2 ± 0.4 | S | 1.7 ± 0.3 | S |
#6 | 3.0 ± 1.0 | S | 2.8 ± 0.7 | S |
#18 | 4.0 ± 1.0 | I | 2.0 ± 0.5 | S |
#19 | 6.0 ± 1.0 | I | 3.0 ± 0.6 | S |
#20 | 20.0 ± 2.3 | R | 7.0 ± 0.6 | S |
- *The Cefoxitin Antibiotic Susceptibility (AS) was determined using the CLSI Interpretive Criteria for cefoxitin as an oxacillin surrogate [41].
- ≤ 4 μg/ml - Susceptible (S), ≥ 8 μg/ml- Resistant (R), values in between Intermediate (I).
- **The Cefepime Antibiotic Susceptibility (AS) was determined using the CLSI Interpretive Criteria for cefepime [41].
- ≤ 8 μg/ml - Susceptible (S), 16 μg/ml - Intermediate (I), ≥ 32 μg/ml - Resistant (R)
- The results are presented as an average of three independent experiments as Average ± Std. Error. The CLSI recommended quality control for MIC for S. aureus, ATCC 29213 (#1) was included each time, and showed MIC within the expected range for cefoxitin (1–4 μg/ml) and cefepime (1–4 μg/ml) respectively.
