Table 2.
Minimum inhibitory concentration according to the methanolic extract of Pelargonium peltatum against strains of Streptococcus mutans (ATCC 25175) and Streptococcus sanguinis (ATCC 10556).
| Microorganism | Extract | Concentration (mg/mL) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 500 | 250 | 125 | 62.5 | 31 | 16 | 8 | 4 | 2 | 1 | ||
| Streptococcus mutans | Leaf | + | MIC | − | − | − | − | − | − | − | − |
| Stem | + | + | MIC | − | − | − | − | − | − | − | |
| Roots | + | MIC | − | − | − | − | − | − | − | − | |
| CHX | + | + | + | + | + | + | + | + | MIC | − | |
|
| |||||||||||
| Streptococcus sanguinis | Leaf | + | + | MIC | − | − | − | − | − | − | − |
| Stem | + | + | + | + | MIC | − | − | − | − | − | |
| Roots | + | + | MIC | − | − | − | − | − | − | − | |
| CHX | + | + | + | + | + | + | MIC | − | − | − | |
∗2CHX: chlorhexidine, MIC: minimum inhibitory concentration, (+): extract inhibit the visible growth of strains, (−): extract not inhibit the visible growth of strains.