TABLE 1.
Frequency of chlorine tolerance and antibiotic resistance genes determined by PCR among Salmonella isolates (n = 172).
| Gene | Primer sequence (5′→3′) | Amplicon size (bp) | No. (%) | |
| Chlorine resistance | exbD | CGTTAGCGACGGTAGATGTGA | 230 | 43.6 |
| CAACGTCTCGTAATCGACGGTT | ||||
| motB | GGTGATCTCGACCAGTTGATAG | 363 | 29.7 | |
| GCCGACGACACGTAACACTT | ||||
| qacE | GGGCGTAGTATGGTTACTTGTTG | 196 | 0.006 | |
| TCCAAGGCCTGACCACATGA | ||||
| qacEΔ1 | GTTGGCGAAGTAATCGCAACATC | 200 | 83.1 | |
| AGCAACCAGGCAATGGCTGTA | ||||
| qacF | GCGATTGCTTGTGAAGTTATTGCAAC | 175 | 59.9 | |
| TACCCGCACCCGACCAAATG | ||||
| sugE | AAGTACACCGACGGCTTCACT | 184 | 4.1 | |
| TGGATTCGCCGAACAGGATGA | ||||
| ybhR | GCCAACTACCTGCAACAGATC | 277 | 20.3 | |
| GTACGGCTTTGCCGATGAAGAT | ||||
| yedQ | CGCACAACTCCTCATCAATGG | 228 | 0 | |
| CAGTGACCTGTGGCTCTGT | ||||
| Antibiotic resistance | bla OXA | GAAGCACACACTACGGGTGTT | 342 | 0 |
| GGTACCGATATCTGCATTGCCATA | ||||
| bla CTX | GCACGTCAATGGGACGATGT | 326 | 65.1 | |
| TCGCTGCACCGGTGGTAT | ||||
| bla TEM | CGGATGGCATGACAGTAAGAG | 324 | 76.7 | |
| GCAGAAGTGGTCCTGCAACT | ||||
| qnr B6 | CAGTGCGCTGGGCATTGAA | 302 | 8.7 | |
| CCGAATTGGTCAGATCGCAATG | ||||
| qnr S7 | CAGCGACTTTCGACGTGCTA | 305 | 37.8 | |
| CCCTCTCCATATTGGCATAGG | ||||
| tetG | GCTAGAGCTGTTGAACGAGGTT | 181 | 1.7 | |
| CTCATTCTCTTCGGGTAGCGA | ||||
| tetA | TGTGCTCGGTGGGCTGAT | 165 | 73.3 | |
| AACGAAGCGAGCGGGTTGA | ||||
| floR | GTCCGCTCTCAGACAGAATC | 246 | 61.0 | |
| GCACGAACGCCAGAATCGA | ||||
| cat86 | GCTGTGTAGCCGATATTGAAAC | 222 | 0 | |
| GTACTTGTATGGCAACGGGCAAA | ||||
| cmx | CATCCTGCTCGCCGTACT | 232 | 0 | |
| CACTCTCCTGTCCATGAGGAT |