| Concentration of LSE (%) | LSE | Rifampicin (µg/ml) |
| 50 | +*# | + |
| 25 | − | + |
| 12.5 | − | + |
| 6.25 | − | + |
| 3.12 | − | + |
| 1.56 | − | + |
| 0.78 | − | + |
| 0.39 | − | + |
| 0.19 | − | + |