Table 3.

Average diameter values of Zones of Inhibition (ZOI) for pure and Mg-doped ZnO NPs (2.5–7.5 M %)

S. No	Samples	Zone of inhibition (mm)
		Gram-negative strains	Gram-negative strains	Gram-positive strains
		Proteus	Escherichia coli	Staphylococcus aureus
1	ZnO NPs	6 ± 0.7	9 ± 0.7	9 ± 0.6
2	2.5% Mg-ZnO NPs	9 ± 0.4	10 ± 0.4	13 ± 0.4
3	5% Mg-ZnO NPs	12 ± 0.3	14 ± 0.5	16 ± 0.3
4	7.5% Mg-ZnO NPs	15 ± 0.4	16 ± 0.5	19 ± 0.3