Microorganisms | MIC(μg/ml)/Ampicillin | FICa | FICb | FICI | Effect |
---|
MRSA/ARSA-1
| >400 | 0.50 | ≤0.03 | ≤0.53 | Synergistic |
MRSA/ARSA-5
| >400 | 0.50 | ≤0.03 | ≤0.53 | Synergistic |
MRSA/ARSA-10
| >400 | 0.50 | ≤0.03 | ≤0.53 | Synergistic |
MRSA/ARSA-12
| >400 | 0.50 | ≤0.03 | ≤0.53 | Synergistic |
MRSA/ARSA-14
| >400 | 0.50 | ≤0.03 | ≤0.53 | Synergistic |
- FIC
a
= MIC of the combination/MICa alone; FIC
b
= MIC of the combination/MICb alone and FICI = FICa + FICb.
- a = Alkaloid fractions; b = Ampicillin.
- The FICI was interpreted as follows: (1) a synergistic effect when FICI ≤0.5; (2) an additive or indifferent effect when FICI >0.5 and <1 and (3) an antagonistic effect when FICI >1.