Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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Monitoring of Major Viral Pathogen Contamination in New and Reused Broiler Farm Litter

육계 농장 깔짚에서의 주요 바이러스 병원체 오염 실태 조사

  • Choi, Kang-Seuk (Avian Disease Division, National Veterinary Research and Quarantine Service) ;
  • Jeon, Woo-Jin (Avian Disease Division, National Veterinary Research and Quarantine Service) ;
  • Lee, Eun-Kyoung (Avian Disease Division, National Veterinary Research and Quarantine Service) ;
  • Kwon, Jun-Hun (Avian Disease Division, National Veterinary Research and Quarantine Service) ;
  • Lee, Jin-Hwa (College of Veterinary Medicine, Kangwon National University) ;
  • Sung, Haan-Woo (College of Veterinary Medicine, Kangwon National University)
  • 최강석 (국립수의과학검역원 조류질병과) ;
  • 전우진 (국립수의과학검역원 조류질병과) ;
  • 이은경 (국립수의과학검역원 조류질병과) ;
  • 권준헌 (국립수의과학검역원 조류질병과) ;
  • 이진화 (강원대학교 수의과대학) ;
  • 성환우 (강원대학교 수의과대학)
  • Received : 2011.06.24
  • Accepted : 2011.09.07
  • Published : 2011.09.30
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Abstract

A 5-month (May to November in 2009) monitoring program for five viral pathogens in litter, such as avian influenza virus A (AIV), infectious bronchitis virus (IBV), infectious bursal disease virus (IBDV), fowl adenovirus (FAdV), and chicken infectious anemia virus (CIAV) was conducted in 62 flocks at 31 broiler farms (two flocks in each farm) in Korea in 2009. Viral pathogens were examined twice (before and at the end of the rearing period) at 31 broiler farms, and included fresh litter (n = 16) and recycled litter (n = 15) farms. Thirty-seven viruses (14 IBVs, 2 IBDVs, 9 FAdVs, and 12 CIAVs) were isolated from 75% (12/16) and 73% (11/15) of fresh litter and reused litter farms during the period, respectively, indicating no difference in viral contamination rate between farms using new and reused litter. Of these isolates, three (two CIAVs and one IBDV) were isolated from recycled litter samples collected before the rearing period at three broiler farms, whereas the others (n=34) were isolated from fresh and recycled litter samples collected at the end of the rearing period. When the performances, involving viability, body weight, and feed conversion ratio, were compared, no significant differences were found between farms using fresh and recycled litter during the period.

새 깔짚을 사용하는 16개 농가와 깔짚을 교체하지 않는 15개 농가를 대상으로 2009년 7월부터 11월까지 5개월에 걸쳐 농가당 2회 입식 기준으로 병아리 입식 전과 출하 전 깔짚을 수거하여 주요 바이러스 병원체의 오염 실태를 조사하고, 생산성을 분석하였다. 그 결과, 조사 기간 동안 깔짚을 교체해 주는 농가의 75%(12/16농가)에서, 깔짚을 재사용하는 농가의 73%(11/15)에서 37주의 바이러스가 분리되었다. 바이러스분리 시기별로보면병아리 입식 직전계사에서3주, 육계 출하 직전 계사에서 34주가 분리되었다. 깔짚 형태로 보면 새 깔짚을 사용하는 계사에서 17주, 깔짚을 재사용하는 계사에서 20주가 분리되어 계사 내 바이러스 병원체 오염정도는 깔짚 교체여부와 크게 관련성이 없는 것으로 나타났다. 분리된 바이러스 37주는 병원체별로 보면 IBV 14주, IBDV 2주, FAdV 9주 그리고 CIAV 12주였다. 이 중 IBDV 1주와 CIAV 2주는 입식 직전 계사에서 분리되었다. 본 연구에서 조사한 31개 농장 62개 계군의 생산지수를 조사한 결과, 깔짚 교체 농가와 재활용 농가 간 생산성은 유의성이 있는 차이가 나타나지 않았다.

Keywords

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