Table-1.
Susceptibility of A. hydrophila and E. tarda isolates from coinfected red hybrid tilapia to 16 types of antibiotics.
| Antibiotic (µg/disk) | Resistant, R (%) | Intermediate sensitive, I (%) | Sensitive, S (%) |
|---|---|---|---|
| Nalidixic acid (30) | 21.7 | 26.7 | 51.7 |
| Oxolinic acid (2) | 7.7 | 22.3 | 70.0 |
| Compound sulfonamides (300) | 9.7 | 7.0 | 83.3 |
| Doxycycline (30) | 4.0 | 26.0 | 70.0 |
| Tetracycline (30) | 58.0 | 25.3 | 16.7 |
| Novobiocin (30) | 78.0 | 11.3 | 10.7 |
| Chloramphenicol (30) | 74.0 | 7.7 | 18.3 |
| Kanamycin (30) | 68.3 | 15.0 | 16.7 |
| Sulfamethoxazole (25) | 15.7 | 7.7 | 76.7 |
| Flumequine (30) | 12.3 | 14.3 | 73.3 |
| Erythromycin (15) | 37.7 | 22.3 | 40.0 |
| Ampicillin (10) | 77.0 | 18.7 | 4.3 |
| Spiramycin (100) | 74.7 | 7.7 | 17.7 |
| Oxytetracycline (30) | 6.0 | 22.0 | 72.0 |
| Amoxicillin (25) | 69.7 | 11.3 | 19.0 |
| Fosfomycin (50) | 51.7 | 14.0 | 34.3 |
A. hydrophila=Aeromonas hydrophila, E. tarda=Edwardsiella tarda