Table 3.
Antibacterial activity of Bifurcaria bifurcata epiphytic bacteria. The results are the mean ± SEM of eight independent experiments. Bacitracin, chloramphenicol, oxytetracycline and ampicillin were used as positive controls.
| Epiphytic bacteria | B. subtilis | S. aureus |
|---|---|---|
| IC50 (µg/mL) | IC50 (µg/mL) | |
| 2 | 95.06 (82.41–109.7) | >1000 |
| 3 | 122.4 (87.66–170.9) | 95.54 (67.26–135.7) |
| 4 | >1000 | 722.9 (541.11–965.9) |
| 6 | 102.5 (68.34–153.9) | 63.48 (52.77–76.38) |
| 9 | 532.3 (452.2–626.6) | >1000 |
| 13 | 621.4 (508.2–759.9) | >1000 |
| 14 | 148.5 (115.9–190.4) | >1000 |
| 15 | 126.4 (91.68–174.2) | >1000 |
| 16 | 2.29 (1.79–2.94) | >1000 |
| 17 | 36.97 (29.97–45.60) | >1000 |
| 18 | 98.32 (84.47–114.4) | >1000 |
| 23 | 739 (525.5–1039) | 136.6 (102.8–181.6) |
| 24 | 47.39 (30.12–74.58) | >1000 |
| 25 | 31.01 (21.49–44.75) | >1000 |
| 30 | 71.35 (54.19–93.94) | >1000 |
| 32 | >1000 | 127.1 (85.79–188.4) |
| 34 | 24.17 (14.9–39.20) | 50.85 (40.72–63.50) |
| 35 | 303.3 (144.5–636.5) | >1000 |
| 38 | 58.87 (41.39–83.74) | >1000 |
| 39 | 58.86 (43.60–79.46) | >1000 |
| 40 | 411.5 (323.8–522.9) | >1000 |
| 50 | 62.54 (39.57–98.86) | >1000 |
| 13 B | 52.42 (37.00–74.27) | >1000 |
| Bacitracin | 4.09 (3.30–5.06) | 4.05 (3.35–4.90) |
| Chloramphenicol | 48.14 (33.73–68.71) | 26.01 (19.06–35.5) |
| Oxytetracycline | 0.16 (0.128–0.19) | 0.40 (0.265–0.610) |
| Ampicillin | 0.16 (0.124–0.21) | 0.04 (0.028–0.05) |