TABLE 1.
MICs (micrograms per milliliter) obtained by agar dilution of agents for 260 strains classified by penicillin susceptibility
| Drug | Type of straina | MIC range | MIC50 | MIC90 |
|---|---|---|---|---|
| Penicillin | S | ≤0.008-0.06 | 0.016 | 0.06 |
| I | 0.125-1.0 | 0.25 | 1.0 | |
| R | 2.0-16.0 | 2.0 | 4.0 | |
| Ranbezolid | S | 0.06-1.0 | 0.25 | 1.0 |
| I | 0.125-2.0 | 0.25 | 0.5 | |
| R | 0.06-2.0 | 0.5 | 1.0 | |
| Linezolid | S | 0.25-4.0 | 1.0 | 2.0 |
| I | 0.25-2.0 | 1.0 | 2.0 | |
| R | 0.5-4.0 | 1.0 | 2.0 | |
| Vancomycin | S | 0.125-0.5 | 0.25 | 0.25 |
| I | 0.125-0.5 | 0.25 | 0.25 | |
| R | 0.125-0.5 | 0.25 | 0.25 | |
| Teicoplanin | S | ≤0.016-0.125 | 0.06 | 0.06 |
| I | ≤0.016-0.125 | 0.06 | 0.06 | |
| R | ≤0.016-0.125 | 0.06 | 0.06 | |
| Quinupristin-dalfopristin | S | 0.125-1.0 | 0.5 | 0.5 |
| I | 0.125-1.0 | 0.5 | 0.5 | |
| R | 0.125-1.0 | 0.5 | 1.0 | |
| Amoxicillin-clavulanate | S | 0.016-0.5 | 0.03 | 0.125 |
| I | 0.03-4.0 | 0.25 | 2.0 | |
| R | 0.125-16.0 | 4.0 | 8.0 | |
| Ciprofloxacin | S | 1.0->32.0 | 2.0 | 4.0 |
| I | 0.5-32.0 | 2.0 | 4.0 | |
| R | 0.5->32.0 | 2.0 | 16.0 | |
| Levofloxacin | S | 0.5-32.0 | 1.0 | 2.0 |
| I | 0.5-16.0 | 1.0 | 2.0 | |
| R | 0.5-16.0 | 1.0 | 16.0 | |
| Gatifloxacin | S | 0.25-8.0 | 0.5 | 1.0 |
| I | 0.125-8.0 | 0.5 | 1.0 | |
| R | 0.125-8.0 | 0.5 | 4.0 | |
| Moxifloxacin | S | 0.06-4.0 | 0.25 | 0.5 |
| I | 0.06-4.0 | 0.125 | 0.25 | |
| R | 0.03-4.0 | 0.125 | 2.0 | |
| Erythromycin | S | ≤0.008->64.0 | 0.06 | >64.0 |
| I | ≤0.008->64.0 | 0.06 | >64.0 | |
| R | ≤0.008->64.0 | 2.0 | >64.0 |
a
S, penicillin susceptible; I, penicillin intermediate; R, penicillin resistant.