Protective efficacy of a novel recombinant Marek's disease virus vector vaccine against infectious bursal disease in chickens with or without maternal antibodies
文献类型: 外文期刊
第一作者: Li, Kai
作者: Li, Kai;Liu, Yongzhen;Zhang, Yanping;Gao, Li;Liu, Changjun;Cui, Hongyu;Qi, Xiaole;Gao, Yulong;Zhong, Li;Wang, Xiaomei
作者机构:
关键词: Marek's disease;Infectious bursal disease;Protective efficacy;Chicken;Maternal antibodies
期刊名称:VETERINARY IMMUNOLOGY AND IMMUNOPATHOLOGY ( 影响因子:2.046; 五年影响因子:2.217 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Infectious bursal disease (IBD) causes significant clinical and economic losses to the poultry industry worldwide. Current vaccine programs using live attenuated and inactivated vaccines have numerous drawbacks. As an alternative solution to control IBD, a Marek's disease virus (MDV) vector vaccine (rMDV-VP2) expressing the VP2 gene of infectious bursal disease virus (IBDV) has been developed. In this study, the protective efficacy of rMDV-VP2 was evaluated in a dose-related experiment which showed that a single dose of 1000 PFU was sufficient to fully protect chickens against IBDV infection. Chickens inoculated with lower doses of rMDV-VP2 (250 or 500 PFU) conferred 80 and 90% protection against IBDV. Next, rMDV-VP2 vaccine provided 90% protection against IBDV in commercial layer chickens with maternal antibodies, which was higher than the protective efficacy using the B87 live vaccine of IBDV. Additionally, rMDV-VP2 conferred effective protection against very virulent MDV challenge in chickens (95% for chickens vaccinated with 250 or 500 PFU and 100% for chickens vaccinated with 1000 or 2000 PFU). These results demonstrated that rMDV-VP2 may be a novel bivalent vaccine against IBD and Marek's disease in chickens. (C) 2017 Elsevier B.V. All rights reserved.
分类号: Q96
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