Table 3.
Occurrence and patterns of antibiotic resistance molecular markers detected by RT-PCR among Salmonella enterica isolates from poultry tissue (P) and environmental samples (E)
| Genetic marker | Environment samples N = 31 |
Poultry tissue samples N = 126 |
Isolates with only this marker |
|---|---|---|---|
| tetA | 25 (81%) | 106 (84%) | 12 (39%, E); 49 (39%, P) |
| QnrS | 11 (35%) | 53 (42%) | 0 (E); 1 (0.1%, P) |
| mefA | 3 (10%) | 10 (8%) | 0(E); 2 (0.2%, P) |
| VIM-1 | 0 | 1 (0.1%) | – |
| Both tetAandQnrS | 10 (32%) | 48 (38%) | |
| Both tetAand mefA | 2 (6%) | 4 (0.3%) | |
| Both tetAand VIM-1 | 0 | 1 (0.1%) | |
| Both tetA, QnrS, and mefA | 1 (3%) | 4 (0.3%) |
*None of the isolates were positive for the AMR markers aacC1, NDM, OXA-62, IMP-1