Antibacterial Effect of Juglans Regia Bark against Oral Pathologic Bacteria

Table 1

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

Positive control (+)	Negative control (−)	Concentrations (mg/mL)					Microorganism
		1000	500	250	125	62.5
32	—	12	12	12	6.5	—	Staphylococcus aureus	Average zone of inhibition (mm)
17	—	25	15	10.5	—	—	Streptococcus sanguis
26	—	13.5	11	9	—	—	Streptococcus salivarius
20	—	—	—	—	—	—	Streptococcus mutans

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