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In vitro comparison of the antibacterial effect of the methanolic extracts of Pelargonium peltatum against strains of Streptococcus mutans and Streptococcus sanguinis.
| Microorganism | Extract | Inhibition zone (mm) | ||||
|---|---|---|---|---|---|---|
| Mean | SD | Minimum | Maximum | p value∗ | ||
| Streptococcus mutans | Root | 27.68 | 0.97 | 25.5 | 28.8 | <0.01 |
| Leaf | 25.86 | 0.54 | 24.6 | 26.3 | ||
| Stem | 23.97 | 0.91 | 22.5 | 25 | ||
|
| ||||||
| Streptococcus sanguinis | Root | 30.8 | 0.55 | 30 | 32.1 | <0.01 |
| Leaf | 29.26 | 0.76 | 27.8 | 30.5 | ||
| Stem | 27.53 | 1.13 | 26 | 29.4 | ||
∗Kruskal–Wallis test.
