Table 2.
Mean zone of inhibition of synthesized gold and silver nanoparticles from T. decandra
| AuNPs | AgNPs | Positive control | Negative control | Water extract23 | |
|---|---|---|---|---|---|
| Diameter of zone of inhibition (mm) | |||||
| Enterococcus faecalis | 10.5 ± 0.7c | 14.0 ± 1.4b | 19.5 ± 0.7a | – | – |
| Staphylococcus aureus | 14.5 ± 0.7b | 13.5 ± 0.7b | 29.0 ± 0.7a | – | – |
| Streptococcus faecalis | 13.5 ± 0.7c | 15.5 ± 0.7b | 19.5 ± 0.7a | – | – |
| Bacillus subtilis | 9.5 ± 0.7c | 12.0 ± 1.4b | 25.5 ± 0.7a | – | 2 ± 0.7d |
| Yersinia enterocolitica | 15.5 ± 0.7c | 17.5 ± 0.7b | 29.0 ± 1.4a | – | 3 ± 0.7d |
| Proteus vulgaris | 15.0 ± 1.4c | 20.5 ± 0.7b | 25.0 ± 1.4a | – | 3 ± 0.7d |
| Escherichia coli | 9.5 ± 0.7c | 15.5 ± 0.7b | 25.5 ± 0.7a | – | 4 ± 0.7d |
| Pseudomonas aeruginosa | 11.5 ± 0.7c | 14.5 ± 0.7b | 27.5 ± 0.7a | – | 3 ± 0.7d |
| Candida albicans | 8.5 ± 0.7c | 14.5 ± 0.7b | 22.5 ± 0.7a | – | 2 ± 0.7d |
Notes: Values are expressed as the mean ± standard error of the mean (n = 3), and values followed by same letter are not significantly different at the P < 0.05 as determined by the Duncan’s multiple range test. Positive control was chloramphenicol/nystatin; negative control was dimethyl sulfoxide; –, indicates no inhibition.
Abbreviations: AuNPs, gold nanoparticles; AgNPs, silver nanoparticles.