Table 7.
Antimicrobial activities of the chlorhexidine against oral microorganisms and controlled with zones of inhibition in millimeter using disk diffusion method (mean±SD).
| Plant extract |
Concentration
mg/mL |
S. mutans | S. sanguis | A. viscosus | E. faecalis | S. aureus | E. coli |
|---|---|---|---|---|---|---|---|
| Chlorhexidin | 0.625 | 9.5 ± 0.5 | - | 8.2 ± 0.2 | 7 ± 0.0 | 10 ± 1 | - |
| 0.125 | 12 ± 0.0 | 10.5 ± 0.0 | 10 ± 0.0 | 9.2 ± 0.2 | 13.5 ± 0.5 | 12.2 ± 0.2 | |
| 0.25 | 15 ± 0.0 | 13.7 ± 0.99 | 12 ± 0.5 | 12 ± 0.0 | 17.4 ± 0.7 | 16 ± 0.0 | |
| 0.5 | 18 ± 0.0 | 14.2 ± 0.2 | 14 ± 1 | 17.5 ± 0.5 | 20 ± 0.0 | 18 ± 0.0 | |
| 1 | 23 ± 0.0 | 15.5 ± 0.0 | 17 ± 0.0 | 24.2 ± 0.1 | 24.5 ± 0.5 | 21.2 ± 0.0 | |
| 2 | 25 ± 0.0 | 17 ± 0.0 | 24 ± 0.0 | 25 ± 0.0 | 25.2 ± 0.2 | 23 ± 0.0 | |
| Negative Control | - | - | - | - | - | - |
-: No inhibition zone
These results showed that antibacterial activity of chlorhexidine, a well-known antibacterial agent, was not significantly greater than other extracts (p>0.05).