Table 2.
Diameters (mean ± SD; mm) of clear zones formed by S. typhimurium NCCP10812 and S. enteritidis NCCP12243 to single concentrations (0, 2, and 4%) of NaCl and sequentially increased NaCl concentrations up to 4%.
| Salmonella strains | Antibiotic | Single concentration of NaCl (%) | Sequential increase of NaCl (%) | |||
|---|---|---|---|---|---|---|
| 0 | 2 | 4 | 0→0 | 0→4 | ||
| S. typhimurium NCCP10812 | Amoxycillin | 28.0 ± 0.8 | 27.5 ± 0.6 | 27.3 ± 0.5 | 29.0 ± 0.0A | 29.5 ± 0.6A |
| Chloramphenicol | 31.8 ± 1.0 | 33.3 ± 1.5 | 34.0 ± 1.2 | 33.3 ± 1.0A | 12.0 ± 2.4B | |
| Ciprofloxacin | 47.0 ± 1.2 | 49.5 ± 3.4 | 48.0 ± 2.3 | 48.0 ± 1.6A | 46.5 ± 1.9A | |
| Gentamicin | 26.3 ± 1.0 | 26.8 ± 1.0 | 26.8 ± 1.0 | 26.5 ± 0.6A | 14.3 ± 2.2B | |
| Neomycin | 22.0 ± 0.8 | 22.0 ± 0.8 | 22.3 ± 0.5 | 24.0 ± 2.2A | 22.3 ± 2.1A | |
| Oxytetracycline | 26.8 ± 4.9 | 27.0 ± 4.7 | 27.0 ± 3.6 | 30.5 ± 1.7A | 9.5 ± 1.9B | |
| Streptomycin | 19.0 ± 0.0 | 19.3 ± 0.5 | 19.3 ± 1.0 | 20.3 ± 1.5A | 19.5 ± 1.3A | |
| Tigecycline | 25.5 ± 1.0 | 25.8 ± 1.0 | 26.3 ± 0.5 | 25.8 ± 0.5A | 26.8 ± 1.5A | |
|
| ||||||
| S. enteritidis NCCP12243 | Amoxycillin | 27.8 ± 0.5 | 28.0 ± 0.0 | 26.8 ± 2.2 | 28.8 ± 1.3A | 21.3 ± 8.4B |
| Chloramphenicol | 10.8 ± 2.2 | 9.8 ± 0.5 | 11.0 ± 1.6 | 10.3 ± 2.1B | 30.8 ± 2.8A | |
| Ciprofloxacin | 44.5 ± 6.4 | 44.0 ± 4.6 | 39.3 ± 2.2 | 43.5 ± 4.1A | 38.0 ± 6.9B | |
| Gentamicin | 13.3 ± 0.5 | 13.5 ± 1.3 | 12.5 ± 0.6 | 13.8 ± 1.7B | 23.8 ± 5.6A | |
| Neomycin | 20.5 ± 0.6 | 21.0 ± 0.0 | 21.0 ± 0.8 | 21.0 ± 0.8A | 24.3 ± 2.4A | |
| Oxytetracycline | 8.0 ± 0.0 | 8.0 ± 0.0 | 8.0 ± 0.0 | 8.0 ± 0.0B | 29.8 ± 1.3A | |
| Streptomycin | 16.8 ± 0.5 | 15.0 ± 2.0 | 15.0 ± 0.8 | 16.0 ± 0.8B | 25.5 ± 4.8A | |
| Tigecycline | 25.0 ± 1.2 | 25.3 ± 1.0 | 26.8 ± 1.0 | 26.3 ± 1.0A | 26.8 ± 1.5A | |
A-BMeans within the same row with different superscript letters are different (P < 0.05).