|  |  |  |  |  |  |  | No. of isolates at each MIC, mg/L | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Antimicrobial agent | No. of isolates tested | Susceptible range mg/L | No. of the susceptible strains | Resistant range mg/L | No. of the resistant strains | MIC50, mg/L | MIC90, mg/L | ≤0.03 | 0.06 ≤0.06; CFPM | 0.12 | 0.25 ≤0.25; CAZ | 0.5 | 1 | 2 | 4 | 8 | 16 |
Penicillin | 28 | ≤0.12 | 22 (79 %) | >4 | 0 | 0.06 | 0.25 | 8 | 9 | 5 | 3 | 2 | 0 | 1 | 0 | 0 | 0 |
Ceftazidime | 22 | NA | NA | NA | NA | 0.5 | 2 | Â | Â | Â | 5 | 7 | 7 | 1 | 0 | 2 | 0 |
Cefepime | 22 | ≤1 | 21 (95 %) | >4 | 0 | 0.12 | 0.25 |  | 9 | 7 | 4 | 0 | 1 | 1 | 0 | 0 | 0 |
Meropenem | 22 | ≤0.5 | 22 (100 %) | >1 | 0 | ≤0.03 | 0.12 | 17 | 2 | 2 | 1 | 0 | 0 |  |  |  |  |
 |  |  |  |  |  |  |  |  |  |  | ≤0.25/4 | 0.5/4 | 1/4 | 2/4 | 4/4 | 8/4 | >16/4 |
Piperacillin/tazobactam | 22 | ≤8/4 | 22 (100 %) | >16/4 | 0 | ≤0.25/4 | ≤0.25/4 |  |  |  | 21 | 1 | 0 | 0 | 0 | 0 | 0 |