Immunogenicity of Novel Live Vaccine Based on an Artificial rHN20 Strain against Emerging Fowl Adenovirus 4

文献类型： 外文期刊

第一作者： Zhang, Yu

作者： Zhang, Yu;Pan, Qing;Guo, Rongrong;Liu, Aijing;Xu, Zhuangzhuang;Gao, Yulong;Cui, Hongyu;Liu, Changjun;Qi, Xiaole;Zhang, Yanping;Li, Kai;Gao, Li;Wang, Xiaomei;Wang, Xiaomei

作者机构：

关键词： fowl adenovirus 4; hepatitis-hydropericardium syndrome; rHN20; live vaccine; immunogenicity evaluation

期刊名称：VIRUSES-BASEL （ 影响因子：5.818； 五年影响因子：5.811 ）

ISSN：

年卷期： 2021 年 13 卷 11 期

页码：

收录情况： SCI

摘要： In recent years, hepatitis-hydropericardium syndrome (HHS), caused by novel fowl adenovirus 4 (FAdV-4), has caused serious economic losses to the poultry industry. Vaccines are important for preventing and controlling HHS. Current FAdV-4 vaccine research and development are mainly focuses on inactivated vaccines and relatively fewer live vaccines. We previously demonstrated that the hexon gene is the key gene responsible for the high pathogenicity of FAdV-4 and constructed a non-pathogenic chimeric virus rHN20 strain based on the emerging FAdV-4. In this study, the immunogenicity of artificially rescued rHN20 was evaluated in chickens using different routes and doses as a live vaccine. The live rHN20 vaccine induced high titers of neutralizing antibodies against FAdV-4 and fully protected the immunized chickens against a lethal dose of FAdV-4. Furthermore, immunized chickens showed no clinical symptoms or histopathological changes in the FAdV-4-targeted liver, and the viral load in the tissues of immunized chickens was significantly lower than that of chickens in the challenge control group. Collectively, the live rHN20 vaccine effectively protected our sample against FAdV-4 infection and can be considered a live vaccine candidate for preventing HHS in the poultry industry.

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