Table 1.
Antibacterial activity of PTS and PTSO at different concentrations against pathogenic bacteria that infected S. aurata by the disk-diffusion method, expressed as the average diameter ± standard deviation of the inhibition zone (mm), along with EC50 values.
| Compound | Concentration (mg/mL) | P. anguilliseptica | T. maritimum |
P. damselae subsp. Piscicida |
P. damselae subsp. damselae |
|---|---|---|---|---|---|
| PTS | 2.5 | 12.5 ± 1.12 | 0.0 ± 0.00 | 0.0 ± 0.00 | 11.3 ± 0.83 |
| 5 | 17.5 ± 1.80 | 13.0 ± 1.41 | 11.0 ± 1.41 | 12.8 ± 1.09 | |
| 10 | 19.5 ± 1.80 | 19.0 ± 2.24 | 26.3 ± 2.38 | 13.5 ± 1.12 | |
| 25 | 23.5 ± 1.12 | 30.5 ± 1.80 | 35.0 ± 1.41 | 15.0 ± 0.71 | |
| 50 | 29.8 ± 2.86 | 34.5 ± 1.12 | 43.8 ± 2.38 | 16.5 ± 1.80 | |
| EC50 1 (mg/mL) | 12.7563 | 8.1651 | 8.9399 | 11.6285 | |
| PTSO | 2.5 | 14.5 ± 1.12 | 28.5 ± 1.12 | 40.5 ± 1.66 | 18.8 ± 2.86 |
| 5 | 17.5 ± 1.80 | 39.0 ± 1.41 | 47.5 ± 1.80 | 24.5 ± 1.12 | |
| 10 | 23.5 ± 1.80 | 45.5 ± 1.80 | 56.8 ± 2.86 | 30.5 ± 1.12 | |
| 25 | 32.5 ± 1.12 | 59.0 ± 1.41 | 62.5 ± 2.96 | 39.0 ± 1.00 | |
| 50 | 40.5 ± 1.12 | 66.5 ± 1.12 | 68.0 ± 2.24 | 43.5 ± 1.12 | |
| EC50 1 (mg/mL) | 14.4796 | 10.5698 | 9.0014 | 10.4522 |
1 EC50: Half maximal effective concentration.