| Patterns of antibiotic resistance in Escherichia coli isolated from fresh and recycled poultry litter |
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Haan-Woo Sung1, Kang-Seuk Choi2, Hyuk-Moo Kwon1, Young-Ju Lee3 |
1College of Veterinary Medicine, Kangwon National University
2Avian Disease Division, Animal and Plant Quarantine Agency
3College of Veterinary Medicine, Kyungpook National University |
| 깔짚 교체 및 재사용 육계농장 분리 대장균의 항생제 내성 양상 |
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성환우1, 최강석2, 권혁무1, 이영주3 |
1강원대학교 수의과대학
2농림축산검역검사본부 조류질병과
3경북대학교 수의과대학 |
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| Abstract |
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The isolation rate of Escherichia (E.) coli in poultry litter was investigated at 44 broiler farms, 20 that used fresh litter and 24 that used recycled litter. The patterns of resistance to antibiotics of the E. coli isolates were compared. In litter sampled before the rearing period, the isolation rate of E. coli was higher at farms that used fresh litter; E. coli was present in the litter in 94.5% (35 out of 37 flocks tested) of the farms that used fresh litter vs. 51.2% (21 out of 41 flocks) of the farms that used recycled litter. The susceptibility of the 93 isolates of E. coli to 13 antibiotics was studied. Before the rearing period, E. coli isolates from the farms that recycled litter showed higher resistance rates than isolates from farms that replaced litter with fresh litter. Comparing the antibiotic resistance patterns of isolates from litter sampled before and at the end of the rearing period, the antibiotic resistance rates at the end of the rearing period increased dramatically compared with rates before the rearing period. |
| Key Words:
Escherichia coli, antibiotic resistance, broiler farms, poultry litter |
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