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Volume 30, Number 12—December 2024
Dispatch

Influenza A Virus Antibodies in Ducks and Introduction of Highly Pathogenic Influenza A(H5N1) Virus, Tennessee, USA

David E. Stallknecht, Deborah L. Carter, Abigail G. Blake-Bradshaw, Nicholas M. Masto, Cory J. Highway, Jamie C. Feddersen, Richard Webby, Bradley Cohen, Jeffery D. Sullivan, and Rebecca PoulsonComments to Author 
Author affiliation: University of Georgia, Athens, Georgia, USA (D.E. Stallknecht, D.L. Carter, R. Poulson); Tennessee Technical University, Cookeville, Tennessee, USA (A.G. Blake-Bradshaw, C.J. Highway, B. Cohen); Cornell University, Ithaca, New York, USA (N.M. Masto); Tennessee Wildlife Resources Agency, Nashville, Tennessee, USA (J.C. Feddersen); St. Jude Children’s Research Hospital, Memphis, Tennessee, USA (R. Webby); US Geological Survey, Laurel, Maryland, USA (J.D. Sullivan)

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Table 2

Antibodies to H5 detected in wintering ducks in a study of influenza A virus antibodies in ducks and introduction of highly pathogenic influenza A(H5N1) virus, Tennessee, USA*

Hemagglutination inhibition H5†
 Virus neutralization H5†
Time sampled rg BWT, no. positive/no. tested (%) rg AST, no. positive/no. tested (%) rg BWT rg AST
Pre–H5N1 detection, Nov 7, 2021–Jan 5, 2022 6/63 (10) 1/63 (2) 21/65 (32) 2/65 (3)
H5N1 detection, Jan 24–25, 2022 1/26 (4) 0/26 (0) 3/24 (13) 1/26 (4)
Post–H5N1 detection, Jan 30–31, 2022 4/15 (27) 3/15 (20) 7/12 (58) 3/12 (25)

*As determined by hemagglutination inhibition and virus neutralization using 2 H5 antigens of North American low pathogenicity IAV (reverse genetics BWT) and goose/Guangdong clade 2.3.4.4b H5 lineage of highly pathogenic IAV (reverse genetics AST). AST, IDCDC-RG71A (H5N8) with modified HA and NA from A/Astrakhan/3212/2020 (H5N8) on PR8 backbone; BWT, HA and NA from A/Blue-winged teal/AI12–4150/Texas/2012 (H5N2) on PR8 backbone; HA, hemagglutinin; HI, hemagglutination inhibition; IAV, influenza A virus; NA, neuraminidase; rg, reverse genetics; VN, virus neutralization. †Both tests completed with 2 antigens. Reverse genetics BWT antigen: HA and NA from A/Blue-winged teal/AI12–4150/Texas/2012 (H5N2) on PR8 backbone; and reverse genetics AST antigen: IDCDC-RG71A (H5N8). Modified HA and NA from A/Astrakhan/3212/2020 (H5N8) on PR8 backbone.

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Page created: November 07, 2024
Page updated: November 20, 2024
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