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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 1

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

Time sampled Total HI H5† VN H5† ELLA N1‡ Antibodies to H5 and N1§
Total Prevalence, %¶
Pre–H5N1 detection, Nov 7, 2021–Jan 5, 2022
Total 0/218 (0) 6/63 (10) 21/65 (32) 33/65 (51) 11/65 (17) 13
bELISA-positive 173/218 (79)
% Testing positive
8
 25
 40
H5N1 detection, Jan 24–25, 2022
Total 14/29 (48) 1/26 (4) 3/26 (12) 15/24 (63) 3/24 (13) 12
bELISA-positive 26/29 (90)
% Testing positive
4
 10
 57
Post–H5N1 detection, Jan 30–31, 2022
Total 3/15 (20) 4/15 (27) 8/15 (53) 11/13 (85) 8/13 (62) 62
bELISA-positive 15/15 (100)
% Testing positive 27 53 85

*Values are no. positive/no. tested (%) except as indicated. For HI, VN, and ELLA, testing was limited to bELISA-positive serum. bELISA, blocking enzyme-linked immunosorbent assay; ELLA, enzyme-linked lectin assay; HI, hemagglutination inhibition; VN, virus neutralization. †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) with modified HA and NA from A/Astrakhan/3212/2020 (H5N8) on PR8 backbone. ‡Test used A/ruddy turnstone/New Jersey/AI13–2948/2013(H10N1) as antigen. §Ducks tested positive for antibodies against H5 and N1 as determined by HI, VN, or both, and ELLA. ¶Apparent prevalence in sampled population, adjusted for bELISA results.

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Page created: November 07, 2024
Page updated: November 26, 2024
Page reviewed: November 26, 2024
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