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Development of an Inactivated Avian Influenza Virus Vaccine against Circulating H9N2 in Chickens and Ducks

文献类型： 外文期刊

作者： Liu, Yuzhuo 1 ; Zhao, Dongmin 1 ; Zhang, Jingfeng 1 ; Huang, Xinmei 1 ; Han, Kaikai 1 ; Liu, Qingtao 1 ; Yang, Jing 1 ; Zhang, Lijiao 1 ; Li, Yin 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Vet Med, Nanjing 210014, Peoples R China

2.GuoTai Taizhou Ctr Technol Innovat Vet Biol, Taizhou 225300, Peoples R China

3.Minist Agr, Key Lab Vet Biol Engn & Technol, Nanjing 210014, Peoples R China

4.Nanjing Agr Univ, Coll Vet Med, Nanjing 210095, Peoples R China

5.Jiangsu Univ, Inst Life Sci, Zhenjiang 212013, Peoples R China

关键词： avian influenza virus; inactivated vaccine; protective efficiency; chicken; duck

期刊名称：VACCINES （ 影响因子：7.8； 五年影响因子：7.4 ）

ISSN：

年卷期： 2023 年 11 卷 3 期

页码：

收录情况： SCI

摘要： Avian influenza virus (AIV) subtype H9N2 is the most widespread AIV in poultry worldwide, causing great economic losses in the global poultry industry. Chickens and ducks are the major hosts and play essential roles in the transmission and evolution of H9N2 AIV. Vaccines are considered an effective strategy for fighting H9N2 infection. However, due to the differences in immune responses to infection, vaccines against H9N2 AIV suitable for use in both chickens and ducks have not been well studied. This study developed an inactivated H9N2 vaccine based on a duck-origin H9N2 AIV and assessed its effectiveness in the laboratory. The results showed that the inactivated H9N2 vaccine elicited significant haemagglutination inhibition (HI) antibodies in both chickens and ducks. Virus challenge experiments revealed that immunization with this vaccine significantly blocked virus shedding after infection by both homogenous and heterologous H9N2 viruses. The vaccine was efficacious in chicken and duck flocks under normal field conditions. We also found that egg-yolk antibodies were produced by laying birds immunized with the inactivated vaccine, and high levels of maternal antibodies were detected in the serum of the offspring. Taken together, our study showed that this inactivated H9N2 vaccine could be extremely favourable for the prevention of H9N2 in both chickens and ducks.

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