In Vitro Antibacterial Activity of Galls of Quercus infectoria Olivier against Oral Pathogens

Table 3

MBC values of methanol and acetone extracts from galls of Q. infectoria against oral bacteria.

Bacterial species	Extracts	Extract concentration (mg/mL)
		5.00	2.50	1.25	0.63	0.31	0.16
S. mutans ATCC 25175	Methanol	−	−	−	−	ND	ND
	Acetone	−	−	+	+	ND	ND
S. salivarius ATCC 13419	Methanol	−	−	−	−	−	+
	Acetone	−	−	−	−	+	+
P. gingivalis ATCC 33277	Methanol	−	−	−	+	ND	ND
	Acetone	−	−	+	+	ND	ND
F. nucleatum ATCC 25586	Methanol	−	−	−	−	−	ND
	Acetone	−	−	−	−	−	ND

+: Presence of bacterial growth.
−: Absence of bacterial growth.
ND: not done because the microtiter well at the tested concentration showed the presence of bacterial growth as shown in Table 2.