Table 5.
Biological activity of essential oils in relation to principal component analysis (PCA) groups.
| PCA Group. | Essential Oil | MIC (mg/L) | Urease Inhibitory Activity IC50 (mg/L) | AAI | |
|---|---|---|---|---|---|
| H. pylori ATCC 43504 | MIC50/90 for Clinical H. pylori Strains | ||||
| I | Silver fir | 125 | 250/250 | 37.9 | <0.08 |
| Pine needle | 125 | 250/250 | 18.4 | <0.08 | |
| Lemon | 125 | 250/250 | 35.6 | <0.08 | |
| II | Oregano | 31.3 | 31.3/62.5 | 208.3 | 0.114 |
| Thyme | 15.6 | 62.5/125 | 248.7 | 0.110 | |
| Tea tree | 125 | 125/250 | 39.1 | 0.085 | |
| III | Lemongrass | 15.6 | 62.5/125 | 67.1 | 0.029 |
| Lemon balm | 15.6 | 62.5/125 | >1049.9 | 0.102 | |
| Cedarwood | 15.6 | 31.3/62.5 | 5.3 | 0.015 | |