Table 3 Antibiotic susceptibility of 9 Enterobacteriaceae isolates other than E. coli from broilers using broth microdilution test
Antibiotic | Enterobacter cloacae (n = 5) | Resistance rate (%) | Citrobacter spp. (n = 2) | Resistance rate (%) | Klebsiella pneumoniae (n = 2) | Resistance rate (%) | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
S | I | R | S | I | R | S | I | R | ||||
Penicillin (PEN) | 0 | 0 | 5 | 100 | 0 | 0 | 2 | 100 | 0 | 0 | 2 | 100 |
Erythromycin (ERY) | 0 | 0 | 5 | 100 | 1 | 0 | 1 | 50.0 | 0 | 0 | 2 | 100 |
Rifampicin (RAM) | 0 | 0 | 5 | 100 | 0 | 0 | 2 | 100 | 0 | 0 | 2 | 100 |
Trimethoprim/sulfamethoxazole (T/S) | 2 | 0 | 3 | 60.0 | 0 | 1 | 1 | 50.0 | 0 | 0 | 2 | 100 |
Streptomycin (STR) | 1 | 0 | 4 | 80.0 | 0 | 0 | 2 | 100 | 0 | 0 | 2 | 100 |
Tetracycline (TET) | 4 | 0 | 1 | 20.0 | 1 | 0 | 1 | 50.0 | 0 | 0 | 2 | 100 |
Ceftazidime (CAZ) | 3 | 1 | 1 | 20.0 | 0 | 0 | 2 | 100 | 0 | 0 | 2 | 100 |
Amoxicillin/clavulanic acid (AMC) | 1 | 0 | 4 | 80.0 | 1 | 1 | 0 | 0.0 | 0 | 0 | 2 | 100 |
Chloramphenicol (CMP) | 4 | 0 | 1 | 20.0 | 2 | 0 | 0 | 0.0 | 0 | 0 | 2 | 100 |
Ciprofloxacin (CIP) | 4 | 0 | 1 | 20.0 | 2 | 0 | 0 | 0.0 | 0 | 0 | 2 | 100 |
Gentamicin (GEN) | 4 | 0 | 1 | 20.0 | 2 | 0 | 0 | 0.0 | 0 | 0 | 2 | 100 |
Levofloxacin (LEV) | 4 | 0 | 1 | 20.0 | 2 | 0 | 0 | 0.0 | 0 | 0 | 2 | 100 |
Amikacin (AMK) | 5 | 0 | 0 | 0.0 | 1 | 0 | 1 | 50.0 | 2 | 0 | 0 | 0.0 |
Imipenem (IMP) | 4 | 1 | 0 | 0.0 | 2 | 0 | 0 | 0.0 | 1 | 1 | 0 | 0.0 |