Table 3.
Antimicrobial activity of Eucalyptus globulus Essential Oil.
| Microorganism | Inhibition Zone (mm) | Activity of EO | Control |
|---|---|---|---|
| Gram-positive bacteria | |||
| Bacillus subtilis | 6.67 ± 0.58 | ** | 33 ± 1.00 |
| Enterococcus faecalis | 2.33 ± 0.58 | * | 29 ± 0.50 |
| Staphylococcus aureus | 5.67 ± 0.58 | ** | 32 ± 1.00 |
| Gram-negative bacteria | |||
| Pseudomonas aeruginosa | 4.33 ± 0.58 | * | 25 ± 1.00 |
| Salmonella enterica | 5.10 ± 1.00 | ** | 27 ± 2.00 |
| Yersinia enterocolitica | 5.33 ± 0.58 | ** | 27 ± 1.50 |
| Pseudomonas fluorescens biofilm | 3.67 ± 0.58 | * | 28 ± 1.00 |
| Yeasts | |||
| Candida albicans | 14.00 ± 1.00 | *** | 28 ± 2.00 |
| Candida glabrata | 7.33 ± 0.58 | ** | 33 ± 1.50 |
| Candida krusei | 4.33 ± 0.58 | * | 33 ± 3.00 |
| Candida tropicalis | 5.05 ± 1.00 | ** | 33 ± 1.00 |
| Fungi | |||
| Aspergillus flavus | 11.00 ± 0.00 | *** | 32 ± 0.58 |
| Botrytis cinerae | 11.67 ± 0.58 | *** | 33 ± 1.00 |
| Penicillium citrinum | 12.33 ± 0.58 | *** | 31 ± 0.58 |
* Weak activity (zone 1–5 mm); ** moderate activity (zone 5–10 mm); *** strong activity (over 10 mm); antibiotics used as control: cefoxitin for G− bacteria, gentamicin for G+ bacteria, fluconazole for microscopic filamentous fungi.