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Citation: Wenming Jiang, Xin Yin, Shuo Liu, Shaobo Liang, Cheng Peng, Guangyu Hou, Jinping Li, Xiaohui Yu, Yang Li, Jingjing Wang, Hualei Liu. Continued antigenic variation of highly pathogenic avian influenza A (H7N9) virus in laying hens in China, 2020–2021 [J].VIROLOGICA SINICA, 2022, 37(4) : 631-633.  http://dx.doi.org/10.1016/j.virs.2022.04.012

Continued antigenic variation of highly pathogenic avian influenza A (H7N9) virus in laying hens in China, 2020–2021

  • Corresponding author: Hualei Liu, liuhualei@cahec.cn
  • Received Date: 14 December 2021
    Accepted Date: 31 March 2022
    Available online: 02 May 2022
  • Highlights
    1. 13 strains of H7N9 viruses from laying hens in 2020 and 2021 were identified.
    2. H7N9 viruses in China comprised at least 11 genotypes.
    3. H7N9 viruses are high pathogenic in chickens, not in ducks.
    4. The most H7N9 viruses cross-reacted poorly with H7-Re3 antiserum.
    5. The H7-Re3 vaccine was unable to prevent H7N9 infection.

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  • 10.1016j.virs.2022.04.012-ESM.docx
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    2. Hou, G., Li, J., Wang, S., Cheng, S., Peng, C., Chen, J., Jiang, W., 2019. Hemagglutinin characteristics, changes in pathogenicity, and antigenic variation of highly pathogenic h7n9 avian influenza viruses in China. J. Infect. 78, 158–169.

    3. Jiang, W., Hou, G., Li, J., Peng, C., Wang, S., Liu, S., Zhuang, Q., Yuan, L., Yu, X., Li, Y., Wang, J., Liu, H., 2020. Antigenic variant of highly pathogenic avian influenza a(H7N9) virus, China, 2019. Emerg. Infect. Dis. 26, 379–380.

    4. Shi, J., Deng, G., Ma, S., Zeng, X., Yin, X., Li, M., Zhang, B., Cui, P., Chen, Y., Yang, H., Wan, X., Liu, L., Chen, P., Jiang, Y., Guan, Y., Liu, J., Gu, W., Han, S., Song, Y., Liang, L., Qu, Z., Hou, Y., Wang, X., Bao, H., Tian, G., Li, Y., Jiang, L., Li, C., Chen, H., 2018. Rapid evolution of h7n9 highly pathogenic viruses that emerged in China in 2017. Cell Host Microbe 24, 558–568 e557.

    5. Smith, D.J., Lapedes, A.S., de Jong, J.C., Bestebroer, T.M., Rimmelzwaan, G.F., Osterhaus, A.D., Fouchier, R.A., 2004. Mapping the antigenic and genetic evolution of influenza virus. Science 305, 371–376.

    6. Wang, N., Sun, M., Wang, W., Ouyang, G., Chen, Z., Zhang, Y., Zhao, B., Wu, S., Huang, J., Sun, H., Liao, M., Jiao, P., 2017. Avian influenza (h7n9) viruses co-circulating among chickens, southern China. Emerg. Infect. Dis. 23, 2100–2102.

    7. Wu, Y., Hu, J., Jin, X., Li, X., Wang, J., Zhang, M., Chen, J., Xie, S., Qi, W., Liao, M., Jia, W., 2021. Accelerated evolution of h7n9 subtype influenza virus under vaccination pressure. Virol. Sin. 36, 1124–1132.

    8. Yin, X., Deng, G., Zeng, X., Cui, P., Hou, Y., Liu, Y., Fang, J., Pan, S., Wang, D., Chen, X., Zhang, Y., Wang, X., Tian, G., Li, Y., Chen, Y., Liu, L., Suzuki, Y., Guan, Y., Li, C., Shi, J., Chen, H., 2021. Genetic and biological properties of h7n9 avian influenza viruses detected after application of the h7n9 poultry vaccine in China. PLoS Pathog. 17, e1009561.

    9. Zhang, Q., Shi, J., Deng, G., Guo, J., Zeng, X., He, X., Kong, H., Gu, C., Li, X., Liu, J., Wang, G., Chen, Y., Liu, L., Liang, L., Li, Y., Fan, J., Wang, J., Li, W., Guan, L., Li, Q., Yang, H., Chen, P., Jiang, L., Guan, Y., Xin, X., Jiang, Y., Tian, G., Wang, X., Qiao, C., Li, C., Bu, Z., Chen, H., 2013. H7n9 influenza viruses are transmissible in ferrets by respiratory droplet. Science 341, 410–414.

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    Continued antigenic variation of highly pathogenic avian influenza A (H7N9) virus in laying hens in China, 2020–2021

      Corresponding author: Hualei Liu, liuhualei@cahec.cn
    • China Animal Health and Epidemiology Center, Qingdao, 266032, China

    Abstract: Highlights
    1. 13 strains of H7N9 viruses from laying hens in 2020 and 2021 were identified.
    2. H7N9 viruses in China comprised at least 11 genotypes.
    3. H7N9 viruses are high pathogenic in chickens, not in ducks.
    4. The most H7N9 viruses cross-reacted poorly with H7-Re3 antiserum.
    5. The H7-Re3 vaccine was unable to prevent H7N9 infection.

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