Safety and Immunogenicity of Poultry Vaccine for Protecting Critically Endangered Avian Species against Highly Pathogenic Avian Influenza Virus, United States

In 2023, an outbreak of highly pathogenic avian influenza occurred among critically endangered California condors (Gymnogyps californianus), and >21 died. We evaluated safety, immunogenicity, vaccination strategies, and correlates of antibody response of an influenza vaccine for poultry in black...

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Main Authors: Todd E. Katzner, Ashleigh V. Blackford, Mary Donahue, Samantha E.J. Gibbs, Julianna Lenoch, Michael Martin, Tonie E. Rocke, J. Jeffrey Root, Darrel Styles, Sunny Cooper, Kristin Dean, Zachary Dvornicky-Raymond, Dominique Keller, Carlos Sanchez, Brett Dunlap, Thomas Grier, Michael P. Jones, Gregory Nitzel, Erin Patrick, Maureen Purcell, Aaron J. Specht, David L. Suarez
Format: Article
Language:English
Published: Centers for Disease Control and Prevention 2025-06-01
Series:Emerging Infectious Diseases
Subjects:
Online Access:https://wwwnc.cdc.gov/eid/article/31/6/24-1558_article
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author Todd E. Katzner
Ashleigh V. Blackford
Mary Donahue
Samantha E.J. Gibbs
Julianna Lenoch
Michael Martin
Tonie E. Rocke
J. Jeffrey Root
Darrel Styles
Sunny Cooper
Kristin Dean
Zachary Dvornicky-Raymond
Dominique Keller
Carlos Sanchez
Brett Dunlap
Thomas Grier
Michael P. Jones
Gregory Nitzel
Erin Patrick
Maureen Purcell
Aaron J. Specht
David L. Suarez
author_facet Todd E. Katzner
Ashleigh V. Blackford
Mary Donahue
Samantha E.J. Gibbs
Julianna Lenoch
Michael Martin
Tonie E. Rocke
J. Jeffrey Root
Darrel Styles
Sunny Cooper
Kristin Dean
Zachary Dvornicky-Raymond
Dominique Keller
Carlos Sanchez
Brett Dunlap
Thomas Grier
Michael P. Jones
Gregory Nitzel
Erin Patrick
Maureen Purcell
Aaron J. Specht
David L. Suarez
author_sort Todd E. Katzner
collection DOAJ
description In 2023, an outbreak of highly pathogenic avian influenza occurred among critically endangered California condors (Gymnogyps californianus), and >21 died. We evaluated safety, immunogenicity, vaccination strategies, and correlates of antibody response of an influenza vaccine for poultry in black vultures (Coragyps atratus) and then California condors. We noted differences in antibody titers between vaccinated and unvaccinated birds (vultures p<0.004; condors p­<0.02) but no adverse effects of vaccination. All vaccinated vultures and 80% of vaccinated condors showed maximum measured antibody response within the published range associated with survival of vaccinated and virally challenged chickens. We noted weak evidence of higher antibody responses for birds given two 0.5-mL vaccines versus those given one 1-mL vaccine but no correlation between antibody titers and sex for either species or between antibody titers and bone lead concentrations in vultures. Our results prompted initiation of a vaccination program for condors that could reduce spread of this disease among highly threatened species.
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spelling doaj-art-afa0ddb297e94ce285760595f656d8bc2025-08-20T03:12:42ZengCenters for Disease Control and PreventionEmerging Infectious Diseases1080-60401080-60592025-06-013161131113910.3201/eid3106.241558Safety and Immunogenicity of Poultry Vaccine for Protecting Critically Endangered Avian Species against Highly Pathogenic Avian Influenza Virus, United StatesTodd E. KatznerAshleigh V. BlackfordMary DonahueSamantha E.J. GibbsJulianna LenochMichael MartinTonie E. RockeJ. Jeffrey RootDarrel StylesSunny CooperKristin DeanZachary Dvornicky-RaymondDominique KellerCarlos SanchezBrett DunlapThomas GrierMichael P. JonesGregory NitzelErin PatrickMaureen PurcellAaron J. SpechtDavid L. Suarez In 2023, an outbreak of highly pathogenic avian influenza occurred among critically endangered California condors (Gymnogyps californianus), and >21 died. We evaluated safety, immunogenicity, vaccination strategies, and correlates of antibody response of an influenza vaccine for poultry in black vultures (Coragyps atratus) and then California condors. We noted differences in antibody titers between vaccinated and unvaccinated birds (vultures p<0.004; condors p­<0.02) but no adverse effects of vaccination. All vaccinated vultures and 80% of vaccinated condors showed maximum measured antibody response within the published range associated with survival of vaccinated and virally challenged chickens. We noted weak evidence of higher antibody responses for birds given two 0.5-mL vaccines versus those given one 1-mL vaccine but no correlation between antibody titers and sex for either species or between antibody titers and bone lead concentrations in vultures. Our results prompted initiation of a vaccination program for condors that could reduce spread of this disease among highly threatened species. https://wwwnc.cdc.gov/eid/article/31/6/24-1558_articleInfluenzaviruseshighly pathogenic avian influenza virusBlack vultureCalifornia condorCoragyps atratus
spellingShingle Todd E. Katzner
Ashleigh V. Blackford
Mary Donahue
Samantha E.J. Gibbs
Julianna Lenoch
Michael Martin
Tonie E. Rocke
J. Jeffrey Root
Darrel Styles
Sunny Cooper
Kristin Dean
Zachary Dvornicky-Raymond
Dominique Keller
Carlos Sanchez
Brett Dunlap
Thomas Grier
Michael P. Jones
Gregory Nitzel
Erin Patrick
Maureen Purcell
Aaron J. Specht
David L. Suarez
Safety and Immunogenicity of Poultry Vaccine for Protecting Critically Endangered Avian Species against Highly Pathogenic Avian Influenza Virus, United States
Emerging Infectious Diseases
Influenza
viruses
highly pathogenic avian influenza virus
Black vulture
California condor
Coragyps atratus
title Safety and Immunogenicity of Poultry Vaccine for Protecting Critically Endangered Avian Species against Highly Pathogenic Avian Influenza Virus, United States
title_full Safety and Immunogenicity of Poultry Vaccine for Protecting Critically Endangered Avian Species against Highly Pathogenic Avian Influenza Virus, United States
title_fullStr Safety and Immunogenicity of Poultry Vaccine for Protecting Critically Endangered Avian Species against Highly Pathogenic Avian Influenza Virus, United States
title_full_unstemmed Safety and Immunogenicity of Poultry Vaccine for Protecting Critically Endangered Avian Species against Highly Pathogenic Avian Influenza Virus, United States
title_short Safety and Immunogenicity of Poultry Vaccine for Protecting Critically Endangered Avian Species against Highly Pathogenic Avian Influenza Virus, United States
title_sort safety and immunogenicity of poultry vaccine for protecting critically endangered avian species against highly pathogenic avian influenza virus united states
topic Influenza
viruses
highly pathogenic avian influenza virus
Black vulture
California condor
Coragyps atratus
url https://wwwnc.cdc.gov/eid/article/31/6/24-1558_article
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