Antibacterial Effect of Juglans Regia Bark against Oral Pathologic Bacteria

Table 2

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

	Microorganism	Concentrations (mg/mL)					Negative control (−)	Positive control (+)
		1000	500	250	125	62.5
Average zone of inhibition (mm)	Staphylococcus aureus	7	8	15	16	18		32
	Streptococcus sanguis	—	8.75	11	12.5	14		17
	Streptococcus salivarius	—	—	6.5	16	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.