Table 2.
MIC values and optimum concentrations of conventional antibiotics against E. coli ATCC 25922 and MRSA 43300. (Inhibition zones refers to optimum concentrations).
| Antibiotics | Classification | MIC (μg/mL) | Optimum Concentrations (μg/mL) | Inhibition Zones (mm) | |||
|---|---|---|---|---|---|---|---|
| E. coli | S. aureus | E. coli | S. aureus | E. coli | S. aureus | ||
| Ampicillin | Beta-lactam antibiotic | 2 | 1 | 1280 | 640 | 11 | 15 |
| Kanamycin | Aminoglycosides | 4 | 64 | 320 | 5120 | 14 | 10 |
| Erythromycin | Macrolides | 4 | >256 | 2560 | 5120 | 6 | 6 |
| Chloramphenicol | Amphenicols | 4 | 2 | 320 | 320 | 14 | 18 |
| Florfenicol | Amphenicols | 1 | 1 | 2560 | 160 | 17 | 16 |
| Streptomycin | Aminoglycosides | 8 | 2 | 320 | 320 | 14.5 | 14 |
| Amikacin | Aminoglycosides | 1 | 0.5 | 160 | 640 | 15 | 13 |
| Gentamicin | Aminoglycosides | 0.5 | 0.25 | 160 | 20 | 16 | 13 |
| Tetracycline | Tetracyclines | 1 | 0.125 | 160 | 20 | 14 | 13 |
| Bacitracin | Polypeptide | >256 | 64 | 5120 | 2560 | 6 | 14.5 |
| Vancomycin | Glycopeptides | >256 | 1 | 5120 | 160 | 6 | 15 |