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Distribution of FICI values for the combination of sitafloxacin and sulbactam against XDR-A. baumannii isolates.
| Sulbactam/sitafloxacin | Synergy (FICI ≤0.5) | Partial synergy (FICI 0.5–1) | Addition (FICI 1) | Indifference (FICI 1–4) | Antagonism (FICI ≥4) |
|---|---|---|---|---|---|
| Number of isolates | 8 | 25 | 8 | 9 | 0 |
| Rate | 16% | 50% | 16% | 18% | 0 |
FICI, fractional inhibitory concentration index.
