Table 3.
Fractional Inhibitory Concentration Index (FICI) of Ceftazidime and EOs against Klebsiella pneumoniae strains. The FICI was considered to indicate a synergistic effect if its value was ≤0.5, additive if it was from >0.5 to ≤1, indifferent if it was from >1.0 to ≤4, and antagonistic if it was >4.
| Kp Strain | 640U | 889U | 126U | 98LCR | 338U | 537U1 | 971U | 197U | 182D | ATCC 700603 | Mean FICI |
|---|---|---|---|---|---|---|---|---|---|---|---|
| CAZ + thyme | 0.333 | 0.333 | 0.083 | 0.333 | 0.083 | 0.333 | 0.333 | 0.333 | 0.167 | 0.167 | 0.250 |
| CAZ + turmeric | 0.625 | 0.500 | 0.750 | 0.508 | 0.281 | 0.516 | 0.252 | 0.502 | 0.516 | 1.000 | 0.545 |
| CAZ + rosemary | 0.750 | 0.500 | 1.000 | 0.508 | 0.266 | 0.516 | 0.254 | 0.502 | 0.502 | 0.563 | 0.536 |
| CAZ + peppermint | 0.375 | 0.500 | 0.313 | 0.266 | 0.313 | 0.266 | 0.252 | 0.500 | 0.250 | 0.531 | 0.357 |