TABLE 2.
Kill kinetic results
| Drug | Dose | No. of strains with indicated change in log10 CFU/mla at:
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3 h
|
6 h
|
12 h
|
24 h
|
||||||||||
| −1 | −2 | −3 | −1 | −2 | −3 | −1 | −2 | −3 | −1 | −2 | −3 | ||
| Ranbezolid | 4× MIC | 7 | 2 | 0 | 11 | 3 | 1 | 12 | 11 | 3 | 12 | 12 | 9 |
| 2× MIC | 6 | 0 | 0 | 7 | 1 | 0 | 12 | 8 | 2 | 12 | 11 | 5 | |
| MIC | 4 | 0 | 0 | 5 | 0 | 0 | 10 | 5 | 0 | 10 | 8 | 3 | |
| Linezolid | 4× MIC | 6 | 2 | 0 | 11 | 4 | 0 | 12 | 10 | 1 | 12 | 12 | 9 |
| 2× MIC | 5 | 0 | 0 | 8 | 2 | 0 | 12 | 6 | 1 | 12 | 12 | 6 | |
| MIC | 3 | 0 | 0 | 3 | 1 | 0 | 9 | 5 | 0 | 11 | 7 | 2 | |
| Vancomycin | 4× MIC | 11 | 4 | 0 | 12 | 7 | 0 | 12 | 12 | 8 | 12 | 12 | 12 |
| 2× MIC | 11 | 4 | 0 | 12 | 6 | 0 | 12 | 12 | 8 | 12 | 12 | 12 | |
| MIC | 10 | 2 | 0 | 12 | 4 | 0 | 12 | 12 | 7 | 10 | 11 | 10 | |
| Teicoplanin | 4× MIC | 7 | 0 | 0 | 9 | 0 | 0 | 12 | 9 | 1 | 12 | 12 | 10 |
| 2× MIC | 6 | 0 | 0 | 7 | 0 | 0 | 12 | 8 | 1 | 12 | 12 | 10 | |
| MIC | 4 | 0 | 0 | 6 | 0 | 0 | 12 | 8 | 1 | 11 | 10 | 7 | |
| Quinupristin- dalfopristin | 4× MIC | 12 | 12 | 10 | 12 | 12 | 10 | 12 | 12 | 12 | 12 | 12 | 12 |
| 2× MIC | 12 | 12 | 10 | 12 | 12 | 10 | 12 | 12 | 12 | 12 | 12 | 12 | |
| MIC | 12 | 12 | 9 | 12 | 12 | 10 | 12 | 12 | 8 | 11 | 7 | 7 | |
| Amoxicillin- clavulanate | 4× MIC | 12 | 4 | 0 | 12 | 6 | 1 | 12 | 12 | 7 | 12 | 12 | 11 |
| 2× MIC | 12 | 4 | 0 | 12 | 6 | 1 | 12 | 12 | 7 | 12 | 12 | 11 | |
| MIC | 8 | 3 | 0 | 12 | 3 | 1 | 12 | 12 | 4 | 12 | 12 | 10 | |
| Ciprofloxacin | 4× MIC | 12 | 4 | 0 | 12 | 10 | 0 | 12 | 12 | 9 | 12 | 12 | 11 |
| 2× MIC | 11 | 1 | 0 | 12 | 8 | 0 | 12 | 12 | 8 | 12 | 12 | 11 | |
| MIC | 7 | 0 | 0 | 12 | 1 | 0 | 12 | 12 | 6 | 10 | 10 | 6 | |
| Levofloxacin | 4× MIC | 11 | 3 | 0 | 12 | 10 | 0 | 12 | 12 | 8 | 12 | 12 | 11 |
| 2× MIC | 11 | 2 | 0 | 12 | 9 | 0 | 12 | 12 | 8 | 12 | 12 | 11 | |
| MIC | 6 | 0 | 0 | 11 | 2 | 0 | 11 | 10 | 3 | 12 | 10 | 6 | |
| Gatifloxacin | 4× MIC | 12 | 4 | 0 | 12 | 10 | 0 | 12 | 12 | 8 | 12 | 12 | 11 |
| 2× MIC | 12 | 3 | 0 | 12 | 8 | 0 | 12 | 12 | 7 | 12 | 12 | 11 | |
| MIC | 7 | 0 | 0 | 12 | 3 | 0 | 12 | 10 | 4 | 12 | 12 | 7 | |
| Moxifloxacin | 4× MIC | 12 | 3 | 0 | 12 | 8 | 0 | 12 | 12 | 8 | 12 | 12 | 11 |
| 2× MIC | 10 | 0 | 0 | 12 | 6 | 0 | 12 | 12 | 7 | 12 | 12 | 11 | |
| MIC | 5 | 0 | 0 | 9 | 1 | 0 | 10 | 9 | 2 | 12 | 11 | 9 | |
| Erythromycinb | 4× MIC | 6c | 1 | 0 | 8 | 2 | 0 | 9 | 9 | 4 | 9 | 9 | 9 |
| 2× MIC | 6 | 0 | 0 | 7 | 2 | 0 | 9 | 8 | 2 | 9 | 9 | 8 | |
| MIC | 4 | 0 | 0 | 5 | 0 | 0 | 8 | 6 | 0 | 7 | 6 | 2 | |
−1, 90% killing; −2, 99% killing; −3, 99.9% killing.
Only nine strains for which erythromycin MICs were ≤4.0 μg/ml were tested.