Table 2.
Antimicrobial activity of AgNPs against pathogenic bacteria.
| Pathogenic Bacteria | ATCC No. | AgNP Tested Solution | MIC | MBC |
|---|---|---|---|---|
| mg/mL | mg/mL | |||
| Staphylococcus aureus | 25923 | TS1 | >1.41 | >1.41 |
| TS2 | 0.27 | 3.28 | ||
| TS3 | 1.21 | >1.45 | ||
| TS4 | 0.09 | 2.37 | ||
| BBE | >2.5 | >2.5 | ||
| AgNO3 | 0.02 | >0.15 | ||
| AgC2H3O2 | 0.03 | >0.15 | ||
| MRSA | 43300 | TS1 | 1.41 | 1.41 |
| TS2 | 0.34 | 0.82 | ||
| TS3 | 0.42 | 1.45 | ||
| TS4 | 0.24 | 0.79 | ||
| BBE | >2.5 | >2.5 | ||
| AgNO3 | 0.02 | 0.05 | ||
| AgC2H3O2 | 0.02 | 0.05 | ||
| Escherichia coli | 25922 | TS1 | >1.41 | >1.41 |
| TS2 | 0.54 | 0.68 | ||
| TS3 | 1.45 | 1.45 | ||
| TS4 | 0.19 | 0,19 | ||
| BBE | >2.5 | >2.5 | ||
| AgNO3 | 0.02 | 0.02 | ||
| AgC2H3O2 | 0.02 | 0.02 | ||
| Klebsiella pneumoniae | 700603 | TS1 | >1.41 | >1.41 |
| TS2 | 2.74 | 3.28 | ||
| TS3 | 1.45 | 1.45 | ||
| TS4 | 0.99 | 1.38 | ||
| BBE | >2.5 | >2.5 | ||
| AgNO3 | >0.15 | >0.15 | ||
| AgC2H3O2 | >0.15 | >0.15 | ||
| Pseudomonas aeruginosa | 27853 | TS1 | >1.41 | >1.41 |
| TS2 | 0.41 | 0.82 | ||
| TS3 | 1.45 | >1.45 | ||
| TS4 | 0.15 | 0.25 | ||
| BBE | >2.5 | >2.5 | ||
| AgNO3 | 0.02 | 0.02 | ||
| AgC2H3O2 | 0.02 | 0.02 |
ATCC—American Type Culture Collection; MIC—minimal inhibitory concentration; MBC—minimum bactericidal concentration; MRSA—methicillin-resistant S. aureus, BBE—beech bark extract; AgNO3—silver nitrate; AgC2H3O2—silver acetate; TS1—beech bark extract, pH = 4, AgNO3; TS2—beech bark extract, pH = 9, AgNO3; TS3—beech bark extract, pH = 4, AgC2H3O2; TS4—beech bark extract, pH = 9, AgC2H3O2.