| Propolis from Beni Khalled | Propolis from Zelligua | ||
| Concentration (mg) | Growth inhibition (%) | Concentration (mg) | Growth inhibition (%) |
| 10 | 65 ± 1.96 | 20 | 50 ± 4.08 |
| 50 | 100 ± 3.20 | 50 | 100 ± 1.60 |