Table 2: Average of inhibition zone of ethanolic extract on bacteria (mm).

MicroorganismConcentrations (mg/mL)Negative control (−)Positive control (+)
100050025012562.5

Average zone of inhibition (mm)Staphylococcus aureus 7 8 15161832
Streptococcus sanguis 8.7511 12.514 17
Streptococcus salivarius 6.516 18 26
Streptococcus mutans 10 13 20

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