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Patterns of antibiotic resistance in Escherichia coli isolated from fresh and recycled poultry litter

깔짚 교체 및 재사용 육계농장 분리 대장균의 항생제 내성 양상

  • Sung, Haan-Woo (College of Veterinary Medicine, Kangwon National University) ;
  • Choi, Kang-Seuk (Avian Disease Division, Animal and Plant Quarantine Agency) ;
  • Kwon, Hyuk-Moo (College of Veterinary Medicine, Kangwon National University) ;
  • Lee, Young-Ju (College of Veterinary Medicine, Kyungpook National University)
  • 성환우 (강원대학교 수의과대학) ;
  • 최강석 (농림축산검역검사본부 조류질병과) ;
  • 권혁무 (강원대학교 수의과대학) ;
  • 이영주 (경북대학교 수의과대학)
  • Received : 2017.07.29
  • Accepted : 2017.09.19
  • Published : 2017.09.30

Abstract

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.

Acknowledgement

Supported by : 강원대학교

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