Table 4.
Minimum inhibitory concentration (MIC, µg/mL) of the biosurfactant produced by P. aeruginosa BM02 against pathogenic microbial strains.
| Microbial Strains | Biosurfactant | Tetracycline | Fluconazole |
|---|---|---|---|
| Staphylococcus aureus | 50 | 25 | NT |
| Escherichia coli | NI | 25 | NT |
| Enterococcus faecium | 50 | 25 | NT |
| Salmonella choleraesuis | 50,000 | 25 | NT |
| Pseudomonas aeruginosa | NI | 50 | NT |
| Pseudomonas aeruginosa | 50,000 | NT | 50 |
Tetracycline and fluconazole were used as positive controls for bacterial and fungal strains, respectively.
The tested compounds were added at different concentrations (50,000–25 µg/mL) to the microbial strains for 24 h for bacteria and 48 h for yeast. MIC was determined as the lowest concentration, which did not show any color. NI: There was no inhibition up to the highest tested concentration (50,000 µg/mL). NT: Not tested.