Table 5.
Antibacterial activity of Rosmarinus officinalis EO and Hy.
| R. officinalis EO | R. officinalis Hy | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| MIC 1 | MBC 2 | MBC/MIC Ratio | IZ 3 | VIZ 4 | MIC 1 | MBC 2 | MBC/MIC Ratio | IZ 3 | VIZ 4 | |
| E. coli | 3.13 | 3.13 | 1.00 | 7.00 ± 0.00 | - | na | na | - | - | - |
| P. fluorescens | 3.13 | 6.25 | 0.50 | - | - | na | na | - | - | - |
| A. bohemicus | 0.19 | 0.39 | 0.50 | 9.17 ± 0.76 | 80 ± 00 | na | na | - | - | - |
| K. marina | 1.56 | 3.13 | 0.50 | 7.33 ± 0.58 | 80 ± 00 | na | na | - | - | - |
| B. cereus | 0.39 | 0.39 | 1.00 | 8.33 ± 1.52 | 80 ± 00 | na | na | - | - | - |
1 Minimal inhibitory concentration (% v/v) of R. officinalis EO and HY; 2 minimal bactericidal concentration (% v/v) of EO and Hy; 3 growth inhibition zone by disc diffusion assay (mm); 4 growth inhibition zone by vapor phase test (mm); na, not attained; -, not detected. Values are expressed as means ± SD. Gentamicin determined MIC and MBC values of 6.25 µg/mL for E. coli, 3.13 µg/mL for P. fluorescens, 6.25 µg/mL for A. bohemicus, 1.56 µg/mL for K. marina and 1.56 µg/mL for B. cereus and IZ values of 17.00 ± 1 mm for E. coli, 19.67 ± 0.58 mm for P. fluorescens, 24.33 ± 1.53 mm for A. bohemicus, 24.67 ± 1.53 mm for K. marina and 19.67 ± 1.53 mm for B. cereus.