Antimicrobial activity, bacterial sensitivity, intermediate sensitivity and resistance to antibiotics commonly used against Klebsiella pneumoniae and Proteus spp
| Antimicrobial drug | K pneumoniae (9 isolates) | Proteus spp (9 isolates) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| MIC50 | MIC90 | S% | I% | R% | MIC50 | MIC90 | S% | I% | R% | |
| Fosfomycin tromethamine* | 1 | 32 | 100.0 | 0.0 | 0.0 | 1 | >256 | 55.6 | 22.2 | 22.2 |
| Levofloxacin | 0.125 | >256 | 66.7 | 0.0 | 33.3 | 1 | 16 | 55.6 | 11.1 | 33.3 |
| Moxifloxacin | 0.062 | >256 | – | – | – | 8 | 64 | – | – | – |
| Cefdinir | 128 | 256 | 44.4 | 0.0 | 55.6 | 0.25 | 32 | 55.6 | 0.0 | 44.4 |
| Cefixime | 2 | >256 | 44.4 | 11.2 | 44.4 | ≤0.016 | 16 | 77.8 | 0.0 | 22.2 |
| Cefaclor | 256 | >256 | 44.4 | 0.0 | 55.6 | >256 | >256 | 44.4 | 0.0 | 55.6 |
| Cefprozil | >256 | >256 | 44.4 | 0.0 | 55.6 | 256 | >256 | 44.4 | 0.0 | 55.6 |
| Cefuroxime | 64 | >256 | 44.4 | 0.0 | 55.6 | 128 | >256 | 44.4 | 0.0 | 55.6 |
| Amoxicillin/clavulanic acid | 8 | 16 | 66.7 | 33.3 | 0.0 | 16 | 64 | 44.4 | 44.5 | 11.1 |
| Cefotaxime | 2 | 128 | 44.4 | 11.2 | 44.4 | 0.125 | 64 | 66.7 | 0.0 | 33.3 |
| Nitrofurantoin | 32 | 256 | 66.7 | 22.2 | 11.1 | 64 | 128 | 11.1 | 77.8 | 11.1 |
*Determination of the breakpoint of fosfomycin tromethamine to Enterobacteriaceae (sensitivity rate ≤64 mg/L; resistance rate ≥256 mg/L).
I, intermediate; MIC, minimal inhibitory concentration; R, resistant; S, susceptible.