| Antibiotics | Proportion of resistant isolates | ||
|
| 10 µg·mL−1 | 25 µg·mL−1 | 50 µg·mL−1 |
| Erythromycin | 92 | 92 | 88 |
| Kanamycin | 55 | 33 | 22 |
| Spectinomycin | 70 | 35 | 18 |
| Neomycin | 93 | 72 | 37 |
| Ampicillin | 85 | 36 | 23 |
| Heavy metals | Proportion of resistant isolates | ||
| Cu | 10 µg·mL−1 | 50 µg·mL−1 | 100 µg·mL−1 |
| 80 | 45 | 25 | |
| Zn | 10 µg·mL−1 | 30 µg·mL−1 | 50 µg·mL−1 |
| 100 | 85 | 56 | |
| Al | 100 µg·mL−1 | 200 µg·mL−1 | 500 µg·mL−1 |
| 100 | 100 | 95 | |
| Pb | 100 µg·mL−1 | 200 µg·mL−1 | 500 µg·mL−1 |
| 100 | 96 | 84 | |