Synthesis of Zinc Oxide Nanoparticles Using Leaf Extract of Lippia adoensis (Koseret) and Evaluation of Its Antibacterial Activity

Table 2

Zone of inhibition (mm) of ZnO nanoparticles against Gram-positive and Gram-negative bacterial strains.

Samples	Conc. (mg/µL)	Zone of inhibition (mm) (diameter)
		Gram-positive bacteria		Gram-negative bacteria
		S. aureus	E. faecalis	E. coli	K. pneumonia
1 : 1 UZnO	1 : 2	14	10	9	12
	1 : 4	12	8	12	11
	1 : 8	12	8	9	10
1 : 1 ZnO	1 : 2	8	6	6	6
	1 : 4	8	6	8	6
	1 : 8	9	6	6	6
3 : 2 ZnO	1 : 2	8	6	6	6
	1 : 4	8	6	6	6
	1 : 8	8	6	6	8
9 : 1 ZnO	1 : 2	6	6	8	8
	1 : 4	7	6	6	6
	1 : 8	8	6	8	6
DMSO (NC)	—	6	6	6	6
Carbenicillin (PC)	—	—	—	6	8
Vancomycin (PC)	—	14	10	—	—
ZnO NPS and antibiotic	—	16	14	13	10