Table 2.
Antimicrobial activity of clove buds essential oil.
| Doses (μL)/strains | EO from (grounded buds) | EO from (ungrounded buds) | Antibiotics | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 5 | 10 | 1 | 5 | 10 | GM | C | E | P | |
| Diameter of inhibition zone (mm) | ||||||||||
| B. cereus | 27.3 ± 4.9a | 29.0 ± 3.2a | 32.1 ± 4.0a | 22.3 ± 1.6a | 26.3 ± 2.4a | 29.0 ± 5.0a | — | — | 25 ± 0a | — |
| S. aureus | 29.5 ± 6.5a | 30.0 ± 2.7a | 32.0 ± 3.6a | 21.6 ± 1.4a | 25.3 ± 5.3a | 26.5 ± 4.0a | — | — | — | 38 ± 2a |
| L. monocytogenes | 28.0 ± 5.6a | 29.8 ± 1.0a | 31.5 ± 3.7a | 17.2 ± 4.5b | 20.3 ± 4.3b | 21.6 ± 2.1b | 24 ± 0b | — | — | — |
| E. coli | 28.6 ± 1.4a | 34.0 ± 3.5a | 35.4 ± 2.6a | 26.0 ± 3.2b | 26.8 ± 1.6b | 28.0 ± 1.6b | — | 30 ± 1a | — | — |
| S. enteritidis | 25.8 ± 1.2b | 28.5 ± 1.8b | 29.6 ± 3.3b | 21.4 ± 3.1c | 22.2 ± 1.9c | 25.0 ± 3.7c | — | — | 36 ± 2a | — |
The different superscripts in the same line means significant difference (P ≤ 0.05). All antibiotics were applied at a concentration of 0.33 μg/mL. GM: gentamicin; C: chloramphenicol; E: erythromycin; P: penicillin. Pure essential oil was applied on a surface of 6 mm disc.