Table 2.
No. of isolates in different MICs and antimicrobial resistance of Salmonella isolates (n = 84)
| No. of isolates in different MICs & resistance rates | ||||||||||||||||||||
| Serotypes | Ampicillin | Cefotaxime | Meropenem | Gentamicin | Tetracycline | |||||||||||||||
| ≤8 | 16 | ≥32 | ≤1 | 2 | ≥4 | ≤1 | 2 | ≥4 | ≤4 | 8 | ≥16 | ≤4 | 8 | ≥16 | ||||||
| SEa(14) | 0 | 0 | 14 | 100.0 | 14 | 0 | 0 | 0.0 | 8 | 1 | 5 | 35.7 | 14 | 0 | 0 | 0.0 | 0 | 1 | 13 | 92.9 |
| STb(11) | 0 | 0 | 11 | 100.0 | 11 | 0 | 0 | 0.0 | 5 | 5 | 1 | 9.1 | 11 | 0 | 0 | 0.0 | 6 | 2 | 3 | 27.3 |
| SGc(16) | 2 | 0 | 14 | 87.5 | 7 | 5 | 4 | 25.0 | 16 | 0 | 0 | 0.0 | 13 | 3 | 0 | 0.0 | 2 | 1 | 13 | 81.3 |
| SGPd(38) | 0 | 0 | 38 | 100.0 | 33 | 3 | 2 | 5.3 | 34 | 4 | 0 | 0.0 | 35 | 2 | 1 | 2.6 | 22 | 0 | 16 | 42.1 |
| OTe(5) | 0 | 0 | 5 | 100.0 | 4 | 1 | 0 | 0.0 | 3 | 2 | 0 | 0.0 | 5 | 0 | 0 | 0.0 | 1 | 0 | 4 | 80.0 |
| Total(84) | 82 | 97.6 | 6 | 7.1 | 6 | 7.1 | 1 | 1.2 | 49 | 58.3 | ||||||||||
| No of isolates in different MICs & resistance rates | ||||||||||||||||||||
| Subspecies | Tigecycline | Chloramphenicol | Ciprofloxacin | Trimethoprim-sulfamethoxazole | Colistin | |||||||||||||||
| ≤2 | 4 | ≥8 | ≤8 | 16 | ≥32 | ≤1 | 2 | ≥4 | ≤2/38 | – | ≥4/76 | ≤2 | 4 | ≥8 | ||||||
| SEa(14) | 14 | 0 | 0 | 0.0 | 8 | 1 | 5 | 35.7 | 8 | 2 | 4 | 28.6 | 7 | 0 | 7 | 50.0 | 2 | 3 | 9 | 64.3 |
| STb(11) | 9 | 2 | 0 | 0.0 | 6 | 1 | 4 | 36.4 | 10 | 0 | 1 | 9.1 | 7 | 0 | 4 | 36.4 | 4 | 4 | 3 | 27.3 |
| SGc(16) | 13 | 2 | 1 | 6.3 | 7 | 0 | 9 | 56.3 | 16 | 0 | 0 | 0.0 | 14 | 0 | 2 | 12.5 | 5 | 6 | 5 | 31.3 |
| SGPd(38) | 33 | 2 | 3 | 7.9 | 27 | 2 | 9 | 23.7 | 35 | 3 | 0 | 0.0 | 32 | 0 | 6 | 15.8 | 5 | 10 | 23 | 60.5 |
| OTe(5) | 5 | 0 | 0 | 0.0 | 3 | 0 | 2 | 40.0 | 4 | 1 | 0 | 0.0 | 4 | 0 | 1 | 20.0 | 2 | 0 | 3 | 60.0 |
| Total(84) | 4 | 4.8 | 29 | 34.5 | 5 | 6.0 | 20 | 23.8 | 43 | 51.2 | ||||||||||
aS. Enteritidis; bS. Typhimurium; cS. Gallinarum; dS. Pullorum; eother serotypes;
Escherichia coli ATCC 25922 was the quality control, the detailed results are as follows, ampicillin (8 μg/ml), cefotaxime (0.12 μg/ml), meropenem (< 0.125 μg/ml), gentamicin (1 μg/ml), tetracycline (1 μg/ml), tigecycline (0.25 μg/ml), chloramphenicol (4 μg/ml), ciprofloxacin (0.015 μg/ml), trimethoprim-sulfamethoxazole (0.5/9.5 μg/ml) and colistin (2 μg/ml)