Table 1.

Minimum bactericidal concentration (MBC) of different metal oxide nanoparticles against Gram-negative and Gram-positive bacteria

Nanoparticles	MBC values (μg/mL)
	Escherichia coli	Pseudomonas aeruginosa	Staphylococcus aureus	Baccillus subtilis
ZnO	18 ± 0.5	14 ± 0.6	16 ± 0.2	12 ± 0.5
CuO	25 ± 0.3	28 ± 0.5	22 ± 0.5	20 ± 0.7
Fe2O3	65 ± 1.5	120 ± 2.3	80 ± 1.5	78 ± 1.4
Tetracycline*	30 ± 0.4	30 ± 1.2	28 ± 1.2	25 ± 1.5

Notes: Values are mean of three replicates;

^*standard antibiotic.