Green Synthesis Methods of CoFe₂O₄ and Ag-CoFe₂O₄ Nanoparticles Using Hibiscus Extracts and Their Antimicrobial Potential

Table 4

Results of the quantitative assay of the antimicrobial activity of the tested samples expressed in mg/mL.

Microbial tested strains	H11	H6	H10	H1	Leaf extract	Flower extract
Escherichia coli ATCC 8739	0.5	>1	0.062	>1	>1	>1
Pseudomonas aeruginosa ATCC 27853	0.25	0.5	0.031	1	>1	1
Staphylococcus aureus ATCC 6538	0.25	0.5	0.062	>1	>1	>1
Staphylococcus saprophyticus ATCC 15305	0.125	0.25	0.031	0.5	>1	>1
Enterococcus faecalis ATCC 29212	0.5	1	0.062	>1	1	>1
Bacillus subtilis ATCC 6633	0.25	0.25	0.062	0.125	1	1
Candida albicans ATCC 26790	0.25	0.125	0.062	1	>1	1

denotes the good inhibitory activity with low MIC values; denotes the moderate antimicrobial activity with MIC values from 0.125 to 0.5 mg/mL; denotes the low antimicrobial activity with MIC values >0.5 mg/mL.