Abstract
A Newcastle disease virus (NDV)-vectored vaccine expressing clade 2.3.4.4b H5 Hemagglutinin was developed and assessed for efficacy against H5N1 highly pathogenic avian influenza (HPAI) in specific pathogen-free (SPF) chickens, broilers, and domestic ducks. In SPF chickens, the live recombinant NDV-vectored vaccine, rK148/22-H5, achieved complete survival against HPAI and NDV challenges and significantly reduced viral shedding. Notably, the live rK148/22-H5 vaccine conferred good clinical protection in broilers despite the presence of maternally derived antibodies. Good clinical protection was observed in domestic ducks, with decreased viral shedding. It demonstrated complete survival and reduced cloacal viral shedding when used as an inactivated vaccine from SPF chickens. The rK148/22-H5 vaccine is potentially a viable and supportive option for biosecurity measure, effectively protecting in chickens against the deadly clade 2.3.4.4b H5 HPAI and NDV infections. Furthermore, it aligns with the strategy of Differentiating Infected from Vaccinated Animals (DIVA).
Keywords:
Broiler maternally-derived antibodies; Domestic ducks; H5N1 clade 2.3.4.4b; High pathogenic avian influenza; Newcastle disease virus-vectored vaccine.
Copyright © 2024 The Authors. Published by Elsevier Ltd.. All rights reserved.
MeSH terms
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Animals
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Antibodies, Viral* / blood
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Antibodies, Viral* / immunology
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Chickens* / immunology
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Ducks* / immunology
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Ducks* / virology
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Hemagglutinin Glycoproteins, Influenza Virus* / genetics
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Hemagglutinin Glycoproteins, Influenza Virus* / immunology
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Influenza A Virus, H5N1 Subtype* / genetics
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Influenza A Virus, H5N1 Subtype* / immunology
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Influenza A Virus, H5N1 Subtype* / pathogenicity
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Influenza Vaccines / administration & dosage
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Influenza Vaccines / genetics
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Influenza Vaccines / immunology
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Influenza in Birds* / immunology
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Influenza in Birds* / prevention & control
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Newcastle Disease / immunology
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Newcastle Disease / prevention & control
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Newcastle disease virus* / genetics
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Newcastle disease virus* / immunology
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Poultry Diseases / immunology
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Poultry Diseases / prevention & control
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Poultry Diseases / virology
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Specific Pathogen-Free Organisms
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Vaccines, Attenuated / administration & dosage
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Vaccines, Attenuated / genetics
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Vaccines, Attenuated / immunology
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Vaccines, Inactivated* / administration & dosage
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Vaccines, Inactivated* / immunology
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Vaccines, Synthetic* / administration & dosage
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Vaccines, Synthetic* / genetics
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Vaccines, Synthetic* / immunology
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Viral Vaccines / administration & dosage
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Viral Vaccines / genetics
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Viral Vaccines / immunology
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Virus Shedding*
Substances
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Vaccines, Inactivated
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Vaccines, Synthetic
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Antibodies, Viral
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Hemagglutinin Glycoproteins, Influenza Virus
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Influenza Vaccines
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Vaccines, Attenuated
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hemagglutinin, avian influenza A virus
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Viral Vaccines