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Seroprevalence of infectious bursal disease (IBD) and genetic sequence analysis of IBD virus

전염성 F낭병 항체가 조사 및 유전자 분석

  • Kang, Mi-Seon (Jeongeup-Branch, Jeonbuk Institute of Livestock & Veterinary Research) ;
  • Chu, Keum-Suk (Jeongeup-Branch, Jeonbuk Institute of Livestock & Veterinary Research) ;
  • Cho, Hyun-Ung (Jeongeup-Branch, Jeonbuk Institute of Livestock & Veterinary Research) ;
  • Han, Jae-Cheol (Jeongeup-Branch, Jeonbuk Institute of Livestock & Veterinary Research)
  • 강미선 (전라북도축산위생연구소 정읍지소) ;
  • 추금숙 (전라북도축산위생연구소 정읍지소) ;
  • 조현웅 (전라북도축산위생연구소 정읍지소) ;
  • 한재철 (전라북도축산위생연구소 정읍지소)
  • Received : 2012.03.23
  • Accepted : 2012.06.18
  • Published : 2012.06.30

Abstract

The strategy for infectious bursal disease (IBD) control and its success rate under field conditions depends on hygiene management, IBD field pressure, level, and variation in maternally derived IBD antibodies. This study investigated the level of IBD-specific antibody by ELISA and the prevalence of IBD virus by PCR in broilers, white-semi broilers, and Korean native chickens raised in Jeongeup, Jeonbuk. IBD-specific maternally derived antibodies were measured from 698 chickens and the mean titers of maternal antibodies were $3,572{\pm}1,402$ in broilers, $1,262{\pm}762$ in white-semi broilers, and $1,932{\pm}912$ in Korean native chickens. At 2 weeks after vaccination, the geometric mean antibody titers of broiler, white-semi broiler, and Korean native chicken were $582{\pm}427$, $3255{\pm}1,080$, and $1,023{\pm}499$, respectively. According to sequence analysis of the variable virion protein 2 gene, 4 isolates were found to be very virulent IBDV, 9 isolates classical virulent, and 2 isolates intermediate plus vaccine strain.

Keywords

References

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