TABLE 4.
Broth microdilution MICs for 13 isolates of CDC group O-3
| Antimicrobial agent | MIC (μg/ml)
|
||
|---|---|---|---|
| Range | MIC50a | MIC90a | |
| Amikacin | ≤1 | ≤1 | ≤1 |
| Amoxicillin-clavulanateb | 4/2–64/32 | 16/8 | 16/8 |
| Ampicillin | 16–>64 | >64 | >64 |
| Aztreonam | 64–>64 | >64 | >64 |
| Cefazolin | >32 | >32 | >32 |
| Cefotaxime | 4–>64 | 64 | >64 |
| Cefotetan | >64 | >64 | >64 |
| Cefoxitin | 32–>32 | 32 | 32 |
| Cefpodoxime | 4–>16 | >16 | >16 |
| Ceftazidime | 32–128 | 64 | 128 |
| Ceftriaxone | 8–>64 | >64 | >64 |
| Chloramphenicol | ≤1–16 | ≤1 | 4 |
| Ciprofloxacin | 1–>8 | 4 | 8 |
| Gentamicin | ≤0.25 | ≤0.25 | ≤0.25 |
| Imipenem | ≤1–2 | 2 | 2 |
| Piperacillin | 16–>128 | 64 | 128 |
| Tetracycline | ≤1–32 | 4 | 8 |
| Tobramycin | ≤0.25 | ≤0.25 | ≤0.25 |
| Trimethoprim-sulfamethoxazoleb | ≤0.12/2.3–2/38 | ≤0.12/2.4 | 0.5/9.6 |
a
MIC50 and MIC90, MICs at which 50 and 90%, respectively, of the isolates are inhibited.
b
Shown as MIC of first drug/MIC of second drug.