Table 2.
Antimicrobial activity of the biosurfactant and silver NPs
| Diameter of zone of inhibition, in mm | ||||
|---|---|---|---|---|
| Test organisms | Biosurfactant | Silver NPs | Positive control | Negative control |
| S. aureus | 5.42 ± 1.0a | 10.8 ± 0.12 | 13.66 ± 1.52 | 0 |
| B. subtilis | 6.84 ± 0.54 | 9.45 ± 0.89 | 12.45 ± 1.57 | 0 |
| E. coli | 1.21 ± 0.89 | 8.73 ± 0.35 | 15.33 ± 1.15 | 0 |
| K. pneumoniae | 2.74 ± 0.5 | 10.32 ± 1.7 | 15.66 ± 0.57 | 0 |
| A. niger | 3.45 ± 2.1 | 9.96 ± 1.2 | 13.0 ± 2.0 | 0 |
| A. flavus | 5.67 ± 3.2 | 8.76 ± 0.72 | 13.66 ± 2.30 | 0 |
a
Values are expressed as mean ± SD (n = 3); Zone of inhibition not include the diameter of the well (7 mm). Positive control: Ciprofloxacin (10 µg/ disc), Fluconazole (1.0 mg/disc)