References
  1. Guan Y, Shortridge KF, Krauss S, et al. Molecular characterization of H9N2 influenza viruses: were they the donors of the “internal” genes of H5N1 viruses in Hong Kong? Proc Natl Acad Sci USA 1999;96:9363-9367.
  2. Pu J, Wang S, Yin Y, et al. Evolution of the H9N2 influenza genotype that facilitated the genesis of the novel H7N9 virus. Proc Natl Acad Sci U S A 2015;112:548-553.
  3. Sun Y, Liu J. H9N2 influenza virus in China: a cause of concern. Protein Cell 2015;6:18-25.
  4. Khan SU, Anderson BD, Heil GL, et al. A systematic review and meta-analysis of the seroprevalence of influenza A(H9N2) infection among humans. J Infect Dis 2015;212:562-569.
  5. Lin YP, Shaw M, Gregory V, et al. Avian-to-human transmission of H9N2 subtype influenza A viruses: relationship between H9N2 and H5N1 human isolates. Proc Natl Acad Sci U S A 2000;97:9654-9658.
  6. Zhang P, Tang Y, Liu X, et al. Characterization of H9N2 influenza viruses isolated from vaccinated flocks in an integrated broiler chicken operation in eastern China during a 5 year period (1998-2002). J Gen Virol 2008;89:3102-3112.
  7. Park KJ, Kwon HI, Song MS, et al. Rapid evolution of low-pathogenic H9N2 avian influenza viruses following poultry vaccination programmes. J Gen Virol 2011;92:36-50.
  8. Sun Y, Pu J, Fan L, et al. Evaluation of the protective efficacy of a commercial vaccine against different antigenic groups of H9N2 influenza viruses in chickens. Vet Microbiol 2012;156:193-199.
  9. Gu M, Xu L, Wang X, Liu X. Current situation of H9N2 subtype avian influenza in China. Vet Res 2017;48:49.
  10. Peacock THP, James J, Sealy JE, Iqbal M. A global perspective on H9N2 avian influenza virus. Viruses 2019;11:pii:E620.
  11. Sealy JE, Fournie G, Trang PH, et al. Poultry trading behaviours in Vietnamese live bird markets as risk factors for avian influenza infection in chickens. Transbound Emerg Dis 2019. doi: 10.1111/tbed.13308.
  12. Bi Y, Chen Q, Wang Q, et al. Genesis, evolution and prevalence of H5N6 avian influenza viruses in China. Cell Host Microbe 2016;20:810-821.
  13. Chen H, Yuan H, Gao R, et al. Clinical and epidemiological characteristics of a fatal case of avian influenza A H10N8 virus infection: a descriptive study. Lancet 2014;383:714-721.
  14. Wu A, Su C, Wang D, et al. Sequential reassortments underlie diverse influenza H7N9 genotypes in China. Cell Host Microbe 2013;14:446-452.
  15. Zou S, Zhang Y, Li X, et al. Molecular characterization and receptor binding specificity of H9N2 avian influenza viruses based on poultry-related environmental surveillance in China between 2013 and 2016. Virology 2019;529:135-143.
  16. Kumar S, Stecher G, Tamura K. MEGA7: Molecular Evolutionary Genetics Analysis Version 7.0 for bigger datasets. Mol Biol Evol 2016;33:1870-1874.
  17. Jiang W, Liu S, Hou G, et al. Chinese and global distribution of H9 subtype avian influenza viruses. PLoS One 2012;7:e52671.
  18. Fournie G, Guitian J, Desvaux S, et al. Interventions for avian influenza A (H5N1) risk management in live bird market networks. Proc Natl Acad Sci U S A 2013;110:9177-9182.
  19. Wu H, Peng X, Peng X, et al. Genetic and molecular characterization of H9N2 and H5 avian influenza viruses from live poultry markets in Zhejiang Province, eastern China. Sci Rep 2015;5:17508.
  20. Teng Q, Xu D, Shen W, et al. A single mutation at position 190 in hemagglutinin enhances binding affinity for human type sialic acid receptor and replication of H9N2 avian influenza virus in mice. J Virol 2016;90:9806-9825.
  21. Jin F, Dong X, Wan Z, et al. A single mutation N166D in hemagglutinin affects antigenicity and pathogenesis of H9N2 avian influenza virus. Viruses 2019;11:pii:E709.
  22. Pu J, Sun H, Qu Y, et al. M gene reassortment in H9N2 influenza virus promotes early infection and replication: contribution to rising virus prevalence in chickens in China. J Virol 2017;91:pii:e02055-16.