Table 3.
Resistance phenotype associated to the 435 ESBL-producing E. coli isolates from the subdominant flora (selective medium), upon arrival and before departure to slaughterhouse.
| Antibiotic | Resistant isolates upon arrival (n = 337) |
Resistant isolates at departure (n = 98) |
p comparison arrival/departure | ||
|---|---|---|---|---|---|
| Number | Proportion (%) | Number | Proportion (%) | ||
| Tetracycline | 299 | 88.7 | 91 | 92.9 | 0.212 |
| Gentamicin | 33 | 9.8 | 13 | 13.3 | 0.325 |
| Streptomycin | 287 | 85.2 | 73 | 74.5 | 0.014 |
| Florfenicol | 35 | 10.4 | 5 | 5.1 | 0.111 |
| Colistin | 12 | 3.6 | 0 | 0 | 0.123 |
| Sulfonamides | 324 | 96.1 | 94 | 95.9 | 1.000 |
| Nalidixic acid | 134 | 39.8 | 30 | 30.6 | 0.099 |
| Enrofloxacin | 78 | 23.2 | 9 | 9.2 | 0.002 |