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Infection of chicken H9N2 influenza viruses in different species of domestic ducks

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  • Infection of chicken H9N2 influenza viruses in different species of domestic ducks

    Vet Microbiol. 2019 Jun;233:1-4. doi: 10.1016/j.vetmic.2019.04.018. Epub 2019 Apr 12.
    Infection of chicken H9N2 influenza viruses in different species of domestic ducks.

    Wang C1, Wang Z1, Ren X1, Wang L1, Li C1, Sun Y1, Wang M1, Tong Q1, Sun H2, Pu J3.
    Author information

    Abstract

    Domestic ducks are considered as the interface between wild aquatic birds and terrestrial poultry and play an important role in the transmission and evolution of avian influenza viruses (AIVs). However, the infectivity of H9N2 AIVs in different domestic duck species has not been systematically evaluated. Here we investigated the infectivity of various genotypes of chicken H9N2 AIVs in Pekin duck (Anas Platyrhynchos), Mallard duck (Anas Platyrhynchos) and Muscovy duck (Cairina Moschata) through intranasal inoculation. We found that Pekin ducks and Mallard ducks were generally resistant to chicken H9N2 virus infection, while Muscovy ducks were relatively susceptible to H9N2 AIVs. All the tested viruses were isolated from oropharynx, trachea and lung tissues of Muscovy ducks. Additionally, genotype 57 (G57) H9N2 AIVs, which was predominant in chickens since 2010, showed increased virus replication in this duck species, indicating an improved interspecies transmission ability of recent H9N2 viruses from chickens to ducks. Our results demonstrated the role of Muscovy ducks in the ecology of H9N2 AIVs. More attentions should be paid to this host during viral surveillances. Additionally, inactivated H9N2 vaccine may be unnecessarily used in Pekin and Mallard ducks.
    Copyright 2019 Elsevier B.V. All rights reserved.


    KEYWORDS:

    Avian H9N2 influenza virus; Duck; Replication

    PMID: 31176393 DOI: 10.1016/j.vetmic.2019.04.018
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