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Compatibility of H9N2 avian influenza surface genes and 2009 pandemic H1N1 internal genes for transmission in the ferret model

  1. Author:
    Kimble, J. B.
    Sorrell, E.
    Shao, H. X.
    Martin, P. L.
    Perez, D. R.

  2. Author Address

    [Kimble, JB; Sorrell, E; Shao, HX; Perez, DR] Univ Maryland, Dept Vet Med, College Pk, MD 20742 USA [Kimble, JB; Sorrell, E; Shao, HX; Perez, DR] Univ Maryland, Virginia Maryland Reg Coll Vet Med, College Pk, MD 20742 USA [Martin, PL] NCI, Ctr Adv Preclin Res, Sci Applicat Int Corp, Frederick, MD 21702 USA;Perez, DR (reprint author), Univ Maryland, Dept Vet Med, College Pk, MD 20742 USA;dperez1@umd.edu
    1. Year: 2011
    2. Date: Jul
  2. Journal: Proceedings of the National Academy of Sciences of the United States of America
    1. 108
    2. 29
    3. Pages: 12084-12088
  4. Type of Article: Article
  5. ISSN: 0027-8424
  1. Abstract:

    In 2009, a novel H1N1 influenza (pH1N1) virus caused the first influenza pandemic in 40 y. The virus was identified as a triple reassortant between avian, swine, and human influenza viruses, highlighting the importance of reassortment in the generation of viruses with pandemic potential. Previously, we showed that a reassortant virus composed of wild-type avian H9N2 surface genes in a seasonal human H3N2 backbone could gain efficient respiratory droplet transmission in the ferret model. Here we determine the ability of the H9N2 surface genes in the context of the internal genes of a pH1N1 virus to efficiently transmit via respiratory droplets in ferrets. We generated reassorted viruses carrying the HA gene alone or in combination with the NA gene of a prototypical H9N2 virus in the background of a pH1N1 virus. Four reassortant viruses were generated, with three of them showing efficient respiratory droplet transmission. Differences in replication efficiency were observed for these viruses; however, the results clearly indicate that H9N2 avian influenza viruses and pH1N1 viruses, both of which have occasionally infected pigs, have the potential to reassort and generate novel viruses with respiratory transmission potential in mammals.

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External Sources

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  2. DOI: 10.1073/pnas.1108058108
  3. View record in Web of Science®
  4. WOS: 000292876900073

Library Notes

  1. Fiscal Year: FY2010-2011
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