Table 1: Average of inhibition zone of aqueous extract on some oral bacteria (mm).

Positive control (+) Negative control (−) Concentrations (mg/mL)Microorganism
1000500250 125 62.5

3212 12 12 6.5 Staphylococcus aureusAverage zone of inhibition (mm)
1725 15 10.5 Streptococcus sanguis
2613.511 9 Streptococcus salivarius
20Streptococcus mutans

Negative control: water.
Positive control: Tetracycline (30 μg) against Streptococcus mutans, Streptococcus salivarius and Erithromycin (15 μg) against Streptococcus sanguis.
(—): no inhibition zone.