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Viral shedding of clade 2.3.4.4 H5 highly pathogenic avian influenza A viruses by American robins

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  • Viral shedding of clade 2.3.4.4 H5 highly pathogenic avian influenza A viruses by American robins

    Transbound Emerg Dis. 2018 Jul 17. doi: 10.1111/tbed.12959. [Epub ahead of print]
    Viral shedding of clade 2.3.4.4 H5 highly pathogenic avian influenza A viruses by American robins.

    Root JJ1, Bosco-Lauth AM2, Marlenee NL2, Bowen RA2.
    Author information

    Abstract

    American robins (Turdus migratorius) are commonly associated with farmsteads in the United States and have shown previous evidence of exposure to an H5 avian influenza A virus (IAV) near a poultry production facility affected by a highly pathogenic (HP) H5 virus in Iowa, USA during 2015. We experimentally infected American robins with three clade 2.3.4.4 HP H5 viruses (H5N2 and H5N8). A total of 22/24 American robins shed virus, and all three strains were represented. The highest virus titres shed were 104.3 , 104.3 and 104.8 PFU/ml, associated respectively with viruses isolated from poultry, a captive gyrfalcon (Falco rusticolus), and a Northern pintail (Anas acuta). Of those birds that shed, viral shedding was initiated 1 or 2 days post-infection (DPI) and shedding ceased in all birds by 7 DPI. This study adds an additional synanthropic wildlife species to a growing list of animals that can successfully replicate and shed IAVs.


    KEYWORDS:

    Turdus migratorius ; American robin; Avian influenza A virus; Biosecurity; Clade 2.3.4.4; Experimental infection; H5N2; H5N8; Highly pathogenic; Outbreak; Passerine

    PMID: 30014592 DOI: 10.1111/tbed.12959
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