Green Synthesis of Silver Nanoparticles Using Extracts of Ehretia cymosa and Evaluation of Its Antibacterial Activity in Cream and Ointment Drug Delivery Systems

Table 2

The zone of inhibition (mm) obtained with different concentrations of the synthesized silver nanoparticles.

Silver nanoparticle	Concentration	Microorganisms
		S. aureus ATCC 25923	E. coli ATCC 25922
DS	0	—	—
AS1	1	15.9 ± 0.30	14.8 ± 0.43
AS2	1.5	16.4 ± 0.70	15.7 ± 0.33
AS3	2	17.6 ± 0.35	16.5 ± 0.19
MS1	1	18.4 ± 0.16	16.2 ± 0.67
MS2	1.5	22.0 ± 0.12	18.3 ± 0.02
MS3	2	23.1 ± 0.27	19.7 ± 0.11
CI	1	21.2 ± 0.03	19.1 ± 0.06

Note. DS: distilled water (negative control), AS1, AS2, and AS3: 1%, 1.5%, and 2% aqueous SNPs, MS1, MS2, and MS3: 1%, 1.5%, and 2% methanol SNPs, respectively, and CI: 2 mg/mL ciprofloxacin infusion (positive control).