Table 10.
Zones of growth inhibition (mm) showing antibacterial activity of Thymus vulgaris essential oil against 4 bacterial strains assessed by well diffusion method1
| Compound | Amount, µg/mL | Gram (−) bacteria | Gram (+) bacteria | ||
|---|---|---|---|---|---|
| S. typhimurium (ATCC 14028) | E. coli (ATCC 25922) | B. cereus (PTCC1015) | S. aureus (PTCC 1337) | ||
| T. vulgaris | 1,100 | 10 ± 0.0 | 28 ± 2.8 | 12 ± 0.0 | 50 ± 0.0 |
| 2,200 | 12 ± 0.0 | 30 ± 0.0 | 24 ± 2.8 | 56 ± 2.8 | |
| 4,400 | 60 < | 60 < | 60 < | 60 < | |
| 8,800 | 60 < | 60 < | 60 < | 60 < | |
| Positive controls | disk code | ||||
| Tetracycline | Te-302 | 15 ± 1.4 | 20 ± 0.0 | 24 ± 1.4 | 25 ± 4.2 |
| Cephtriaxone | CRO-303 | 24 ± 2.8 | 8 ± 0.0 | 10 ± 1.4 | 37 ± 0.0 |
1Plate diameter = 60 mm; All data are average of triplicate ± SD.
2Te-30 = disks contained 30 μg tetracycline.
3CRO-30 = disks contained 30 μg cephtriaxone.