Table 3.
In vitro anti-staphylococcal activity of Guizotia schimperi extracts and of antibiotics oxacillin and tetracycline
| MIC (μg/ml) | |||
|---|---|---|---|
| Standard strains | Oxacillin | Tetracycline | Extract |
| ATCC 12228 | 0.5 | 64 | 128 |
| ATCC 29213 | 0.5 | 0.5 | 128 |
| ATCC 33591 | 512 | 64 | 128 |
| ATCC 33592 | 512 | 128 | 128 |
| ATCC 43300 | 16 | 0.25 | 256 |
| ATCC BAA 976 | 16 | 0.25 | 128 |
| Clinical isolates | |||
| SA1 | 16 | 0.25 | 128 |
| SA2 | 64 | 16 | 256 |
| SA3 | 512 | 32 | 128 |
| SA4 | 16 | 0.25 | 128 |
| SA5 | 256 | 0.25 | 256 |
| SA6 | 0.5 | 8 | 256 |
| SA7 | 1 | 16 | 128 |
| SA8 | 16 | 0.125 | 128 |
| SA9 | 128 | 64 | 256 |
| SA10 | 0.5 | 0.25 | 128 |
SA1-SA10 = resistant if MIC ≥ 4 μg/ml for oxacillin, ≥ 16 μg/ml for tetracycline [47]
MIC Minimum inhibitory concentration, ATCC American type culture collection, SA Staphylococcus aureus