Table 3.
Geometric means of MIC values found for chalcones isolated from the flowers of Arrabidaea brachypoda against S. aureus strains overexpressing efflux pump genes, except ATCC 25,923 that is a standard strain (All values represent the geometric mean of three simultaneous experiments).
| MIC (μg/mL) | ||||
|---|---|---|---|---|
| Microbial Strains | 1 | 3 | 4 | 5 |
| Staphylococcus aureus ATCC 25923 | 1024 | 1024 | 1024 | 1024 |
| Staphylococcus aureus IS-58 | 1024 | 1024 | 1024 | 1024 |
| Staphylococcus aureus RN-4220 | 1024 | 1024 | 1024 | 1024 |
| Staphylococcus aureus SA1199-B | 1024 | 1024 | 1024 | 1024 |
| Staphylococcus aureus K2068 | 1024 | 1024 | 1024 | 1024 |
| Staphylococcus aureus K4414 | 1024 | 1024 | 1024 | 1024 |
| Staphylococcus aureus K4100 | ≥1024 | ≥1024 | ≥1024 | ≥1024 |