Table 2.

Antibacterial activity of R-AuNPs against Gram-positive and Gram-negative bacterial strains.

Conc. Of R-AuNPs	Zone of Inhibition (mm)
	Staphylococcus aureus	Escherichia coli	Bacillus subtilis	Proteus vulgaris	Proteus vulgaris
Control	0	0	0	0	0
15 mg/mL	24.4 ± 0.12 ***	22 ± 0.07 ***	20 ± 0.16 ***	17 ± 0.3 ***	NZ ns

Significantly different from control at *** p < 0.001, non-significantly different from control at ^ns p > 0.05. Note: N.Z—No zone of inhibition; the values are mean ± standard deviation (n = 3).