Table 3 Biostatic activity of OV EO
From: Chemical profiling, biostatic and biocidal dynamics of Origanum vulgare L. essential oil
Test microorganism (ATCC no.) | Method of assessment | |||
|---|---|---|---|---|
Agar dilution | Broth dilution | Agar diffusion | ||
MIC (mg/ml)a | Inhibition zone, mmb | |||
Ampicillin | ||||
 Gram positive organisms | ||||
  B. subtilis (6633) | 2.36 | 2.36 | 26.9 ± 0.9 | 22 ± 0.5 |
  E. faecalis (8043) | 9.44 | 2.36 | 13.6 ± 0.3 | 18 ± 0.7 |
  M. lutea (9341) | 4.72 | 2.36 | 20.6 ± 0.7 | 15 ± 0.9 |
  S. aureus (6538) | 2.36 | 1.18 | 20.5 ± 0.6 | 12 ± 0.4 |
  S. epidermidis (12228) | 9.44 | 2.36 | 26.9 ± 1.1 | 21 ± 0.8 |
 Gram negative organisms | ||||
  Br. bronchiseptica (4617) | 2.36 | 2.36 | 38 ± 1.5 | 23 ± 0.7 |
  E. coli (8729) | 4.72 | 4.72 | 12.9 ± 0.8 | 10 ± 0.8 |
  Ps. aeruginosa (9027) | > 9.44 | > 18.88 | 9.3 ± 0.4 | 15 ± 0.4 |
 Fungi | ||||
  C. albicans (10231) | 2.36 | 2.36 | 16.1 ± 0.9 | 15 ± 0.3 |
  S. cerevisiae (2601) | 2.36 | 2.36 | 29.5 ± 0.8 | 23 ± 0.5 |
  A. niger (16404) | 2.36 | – | – | 16 ± 0.8 |