Table 2.
Inhibition zone (cm) of silver nanoparticles synthesized by P. formosum and water extract of P. formosum against bacterial and fungal pathogens with antibiotic standard. Data are expressed as mean ± SE (n=3)
| Diameter of inhibition zone (cm) | ||||||
|---|---|---|---|---|---|---|
| AgNPs synthesized by P. formosum | Water extract by P. formosum | Antibiotic as appositive control | Deionized water as negative control | |||
| Cefprozil | Polymixin | |||||
| Gram (+V) bacteria | Staphylococcus aureus | 2.5 ± 0.03 | 1.8 ± 0.03 | 1.5 ± 0.05 | 2.0 ± 0.03 | - |
| Micrococus luteus | 1.5 ± 0.03 | 0.8 ± 0.00 | 1.0 ± 0.03 | 1.5 ± 0.00 | - | |
| Enterococcus Faecalis | 1.3 ± 0.05 | 1.0 ± 0.05 | 1.5 ± 0.07 | 2.0 ± 0.08 | - | |
| Gram (− V) bacteria | Serratia marcescens | 1.3 ± 0.03 | 1.0 ± 0.03 | 1.0 ± 0.03 | 1.5 ± 0.03 | - |
| Salmonella spp. | 1.5 ± 0.03 | 1.1 ± 0.00 | 1.1 ± 0.00 | 1.5 ± 0.03 | - | |
| Vibrio spp. | 2.7 ± 0.03 | 1.2 ± 0.05 | - | 1.0 ± 0.03 | - | |
| Aeromonas hydrophila | 2.0 ± 0.05 | 1.0 ± 0.06 | 2.0 ± 0.05 | 2.3 ± 0.06 | - | |
| Pseudomonas aeruginosa | 1.5 ± 0.07 | 1.0 ± 0.00 | 1.0 ± 0.03 | 1.3 ± 0.00 | - | |
| Escherichia coli | 1.7 ± 0.00 | 1.0 ± 0.05 | 1.5 ± 0.00 | 1.6 ± 0.03 | - | |
| Proteus spp. | 1.5 ± 0.03 | 1.2 ± 0.03 | 1.1 ± 0.00 | 1.8 ± 0.00 | - | |
| Fungal species | Candida albicans | 1.9 ± 0.03 | 1.3 ± 0.00 | 1.2 ± 0.02 | 1.6 ± 0.03 | - |
- =No inhibitory effect; width 0.1 to .08 cm = week activity; width 0.8 to 1.0 cm = moderate activity; width < 1.0 cm = strong activity