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Proposed microbiological cutoffs for interpreting MIC and disk diffusion susceptibility tests
| Susceptibility | Staphylococci
|
Beta-hemolytic streptococci
|
||
|---|---|---|---|---|
| MIC (μg/ml) | Disk diffusion 2-μg disk (mm) | MIC (μg/ml) | Disk diffusion 2-μg disk (mm) | |
| Susceptible | ≤0.5 | ≥20 | ≤0.25 | ≥15 |
| Intermediate | 1 | 17-19 | ||
| Resistant | ≥2 | ≤16 | ||
