Table 2.
Direct activity of the essential oils against the Gram-negative strains (n = 6). In bold, the most promising results.
| Minimum Inhibitory Concentration (MIC, μg/mL) | |||||
|---|---|---|---|---|---|
| EO |
E. coli LMG 8223 |
E. coli LMG 15862 |
P. aeruginosa LMG 6395 |
K. pneumoniae LMG 20218 |
E. aerogenes LMG 2094 |
| AW | 500 | 1000 | >1000 | 500 | 500 |
| BE | >1000 | >1000 | >1000 | >1000 | >1000 |
| CA | >1000 | >1000 | >1000 | >1000 | >1000 |
| CC | 250 | 500 | 500 | 250 | 250 |
| CF | 1000 | >1000 | >1000 | >1000 | >1000 |
| GF | 1000 | 1000 | >1000 | 1000 | 1000 |
| LG | 1000 | >1000 | >1000 | >1000 | >1000 |
| LS | >1000 | >1000 | >1000 | >1000 | >1000 |
| OC | 250 | 500 | 500 | 500 | 500 |
| PM | 1000 | >1000 | >1000 | >1000 | 1000 |
| AMP | 64 | >64 | >64 | >64 | >64 |
| AMX | 8 | >64 | >64 | >64 | >64 |
| CTX | <1 | <1 | 8 | 32 | 4 |
| DOX | <1 | <1 | 2 | 8 | 1 |
| PEN V | >64 | >64 | >64 | >64 | >64 |
| TET | <1 | <1 | 2 | 8 | 2 |
AW—ajowan, BE—basil, CA—German chamomile, CC—Chinese cinnamon, CF—coriander, EO—essential oil, GF—clove, LG—lemongrass, LS—Spanish lavender, OC—oregano, PM—palmarosa, AMP—ampicillin, AMX—amoxicillin, CTX—cefotaxime, DOX—doxycycline, PEN V—penicillin V, TET—tetracycline.