TABLE 6.
Antibiotic resistance phenotypes and genotypes of 41 class 1 integron-positive E. coli isolates from broiler chickensa
| Strain | Treatmentb | Pen | Age (days) | Phenotype (resistance pattern)c | Genotype
|
|||
|---|---|---|---|---|---|---|---|---|
| bla | tet | sul | floR | |||||
| 2440-CE-2 | Control | 2 | 7 | Amo-AmoCla-Amp-Cefx-Spec-Stre-Gent-Sulx-Sulz | A, C | sulI | − | |
| 2447-CE-10 | Control | 10 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2448-CE-17 | Control | 17 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B, C | sulI, sulII | + |
| 2451-CL-17 | Control | 17 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B, C | sulI, sulII | + |
| 2453-CE-10 | Control | 10 | 21 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2454-CE-17 | Control | 17 | 21 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2458-CE2 | Control | 2 | 28 | Amo-AmoCla-Amp-Cefx-Spec-Stre-Gent-Sulx-Sulz | A | sulI | − | |
| 2465-CE-5 | BBM | 5 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2466-CE-18 | BBM | 18 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem, shv | A, B | sulI, sulII | + |
| 2467-CL-1 | BBM | 1 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem, shv | A, B | sulI, sulII | + |
| 2468-CL-5 | BBM | 5 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2478-CE-18 | BBM | 18 | 21 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B, C | sulI, sulII | + |
| 2488-CE-6 | PEN | 6 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2489-CE-9 | PEN | 9 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2492-CL-9 | PEN | 9 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A | sulII | + |
| 2511-CE-3 | SAL | 3 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sara-Nali-Sulx-Sulz-Trm/Sul | A | sulI, sulII | − | |
| 2513-CE-14 | SAL | 14 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2514-CL-3 | SAL | 3 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Sara-Nali-Sulx-Sulz-Trm/Sul | A | sulI, sulII | − | |
| 2515-CL-4 | SAL | 4 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2516-CL-14 | SAL | 14 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2519-CE-14 | SAL | 14 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Clho | A, B | sulI, sulII | + | |
| 2520-CL-3 | SAL | 3 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sara-Nali-Sulx-Sulz | A | sulI, sulII | − | |
| 2521-CL-4 | SAL | 4 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B, C | sulI, sulII | + |
| 2522-CL-14 | SAL | 14 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B, C | sulI, sulII | + |
| 2523-CE-3 | SAL | 3 | 21 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B, C | sulI, sulII | + |
| 2525-CE-14 | SAL | 14 | 21 | Amo-AmoCla-Amp-Cefx-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2534-CL-14 | SAL | 14 | 28 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2535-CE-7 | BAC | 7 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sul-Clho | A | sulI, sulII | + | |
| 2536-CE-11 | BAC | 11 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2537-CE-16 | BAC | 16 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B, C | sulI, sulII | + |
| 2538-CL-7 | BAC | 7 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B, C | sulI, sulII | + |
| 2541-CE-7 | BAC | 7 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2542-CE-11 | BAC | 11 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2543-CE-16 | BAC | 16 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2544-CL-7 | BAC | 7 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sara-Nali-Sulx-Sulz-Trm/Sul | A, C | sulI, sulII | − | |
| 2545-CL-11 | BAC | 11 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2550-CL-7 | BAC | 7 | 21 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | A | sulI, sulII | + | |
| 2560-CE-12 | SAL + BAC | 12 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sara-Nali-Clho | tem | A, C | sulI, sulII | + |
| 2563-CL-12 | SAL + BAC | 12 | 7 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sara-Nali-Sulx-Sulz-Clho | tem | A | sulI, sulII | + |
| 2566-CE-12 | SAL + BAC | 12 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
| 2569-CL-12 | SAL + BAC | 12 | 14 | Amo-AmoCla-Amp-Cefx-Cefti-Spec-Stre-Gent-Sulx-Sulz-Clho | tem | A, B | sulI, sulII | + |
a
Table shows antibiotic resistance phenotypes and genotypes of the 41 class 1 integron-positive E. coli isolates from broiler chickens. All the isolates were resistant to penicillin, erythromycin, tylosin, clindamycin, oxytetracycline, novobiocin, and sulfizoxazol. All were susceptible to ceftriaxone, kanamycin, amikacin, and ciprofloxacin.
b
BBM, bambermycin; PEN, penicillin; SAL, salinomycin; BAC, bacitracin; SAL + BAC, salinomycin with bacitracin.
c
Amo, amoxicillin; AmoCla, amoxicillin-clavulanic acid; Amp, ampicillin; Cefx, cefoxitin; Cefti, ceftiofur; Spec, spectinomycin; Stre, streptomycin; Gent, gentamicin; Sara, saraloxacin; Nali, nalidixic acid; Sulx, sulfadimethoxime; Sulz, sulfathiazole;Trm/Sul, trimethoprim-sulfamethoxazole; Clho; chloramphenicol.