Antibacterial Activity of Partially Oxidized Ag/Au Nanoparticles against the Oral Pathogen Porphyromonas gingivalis W83

Table 1

Antibacterial activity on P. gingivalis W83 determined by colony forming units.

	log10; (CFU/mL)	Δlog10; (CFU/mL)
W83	9.4	0
Maltose –Ag NPs	9.5	+0.1
GSH–Ag/Au NPs (0.04 nM)	9.0	−0.4
GSH–Ag/Au NPs (0.14 nM)	8.1	−1.3
0.25 mM H2O2	7.9	−1.5
0.25 mM H2O2 + Ag/Au (0.04 nM)	7.8	−1.6
BHI	0.0	0

Negative sign: log CFU/mL decrease.