Formulation and Evaluation of Antibacterial Creams and Gels Containing Metal Ions for Topical Application

Table 5

Antimicrobial activity of the selected gel formulations in various dilutions against Escherichia coli and Staphylococcus aureus ().

Concentration of each active (%)	Zone of inhibition (mm) (mean ± SD)
	G1		G5
	E. coli	S. aureus	E. coli	S. aureus
0 (blank)	0	0	0	0
0 (paraben concentrate)	0	0	0	0
0.1	0	0	0	0
0.25	8.4 ± 0.2	9.1 ± 0.3	9.2 ± 0.5	9.2 ± 0.17
0.5	11.4 ± 0.1	11.9 ± 0.5	12.3 ± 0.6	11.3 ± 0.4
1	16.5 ± 0.1	18.1 ± 0.9	16.6 ± 1.3	13.9 ± 0.2
2	21.9 ± 0.6	23.1 ± 0.2	21.8 ± 0.2	17.6 ± 0.4
3	24.9 ± 0.3	26.3 ± 0.4	24.4 ± 0.4	19.7 ± 0.4
Gentamicin (control)	22.4 ± 0.15	23.5 ± 0.2	22.7 ± 1.8	21.3 ± 1.2