| Concentration of kanamycin (mg/L) | Induction rate (%) | Chloramphenicol concentration (mg/L) | Induction rate (%) |
| 0 | 100 | 0 | 100 |
| 5 | 28 | 5 | 31 |
| 10 | 0 | 10 | 0 |
| 15 | 0 | 15 | 0 |
| 20 | 0 | 20 | 0 |