Table 2.
Antimicrobial activity of wild accessions of Origanum vulgare L. extract and essential oil against the bacterial strains tested based on the disc diffusion method and MIC value.
| Antimicrobial activity | EO (10 μl/disc) | Standard antibiotic discs | EO | Standard drug (maxipime) |
|---|---|---|---|---|
| Acinetobacter baumannii-A8 | 18 | 18 mm (OFX) | 13.78 | 31.25 |
| Bacillus macerans-M58 | 28 | 19 mm (OFX) | 31.25 | 15.62 |
| Bacillus megaterium-M3 | 9 mm (SCF) | 128 | 15.62 | |
| Bacillus subtilis-ATCC-6633 | 29 | 28 mm (SCF) | 31.25 | 62.5 |
| Bacillus subtilis-A57 | 28 mm (OFX) | 62.5 | 125 | |
| Brucella abortus-A77 | 12 mm (OFX) | 15.62 | ||
| Burkholderia cepacia-A225 | 22 mm (SCF) | 31.25 | ||
| Clavibacter michiganensis-A227 | 35 | 25 mm (SCF) | 15.62 | 31.25 |
| Enterobacter cloacae-A135 | 20 mm (NET) | 62.5 | ||
| Enterococcus faecalis-ATCC-29122 | 10 | 18 mm (SCF) | 62.5 | 125 |
| Escherichia coli-A1 | 18 | 10 mm (SCF) | 31.25 | 125 |
| Klebsiella pneumoniae-A137 | 12 mm (OFX) | 31.25 | ||
| Proteus vulgaris-A161 | 12 mm (OFX) | 15.62 | ||
| Proteus vulgaris-Kukem-1329 | 12 | 13 mm (OFX) | 62.5 | 125 |
| Pseudomonas aeruginosa-ATCC-9027 | 13 mm (NET) | 62.5 | ||
| Pseudomonas aeruginosa-ATCC-27859 | 22 mm (NET) | 31.25 | ||
| Pseudomonas syringae pv. tomato-A35 | 22 mm (OFX) | 62.5 | ||
| Salmonella enteritidis-ATCC-13076 | 24 mm (SCF) | 15.62 | ||
| Staphylococcus aureus-A215 | 14 | 27 mm (SCF) | 62.5 | |
| Staphylococcus aureus-ATCC-29213 | 22 mm (SCF) | 31.25 | ||
| Staphylococcus epidermis-A233 | 22 mm (SCF) | 62.25 | ||
| Streptococcus pyogenes-ATCC-176 | 12 | 10 mm (OFX) | 62.5 | |
| Streptococcus pyogenes-Kukem-676 | 19 | 13 mm (OFX) | 31.25 | |
| Xanthomonas campestris-A235 | 20 mm (SCF) | 31.25 |
OFX = ofloxacin (10 μg/disc), SCF = sulbactam (30 μg) + cefoperazona (75 μg) (105 μg/disc), and NET = netilmicin (30 μg/disc) were used as positive reference standard antibiotic disc.