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Volume 24, Number 6—June 2018
Research

Influenza D Virus Infection in Feral Swine Populations, United States

Lucas Ferguson1, Kaijian Luo1, Alicia K. Olivier, Fred L. CunninghamComments to Author , Sherry Blackmon, Katie Hanson-Dorr, Hailiang Sun2, John Baroch, Mark W. Lutman, Bianca Quade, William Epperson, Richard Webby, Thomas J. DeLiberto, and Xiu-Feng WanComments to Author 
Author affiliations: Mississippi State University, Starkville, Mississippi, USA (L. Ferguson, K. Luo, A.K. Olivier, S. Blackmon, H. Sun, B. Quade, W. Epperson, X.-F. Wan); South China Agricultural University, Guangzhou, China (K. Luo); US Department of Agriculture, Starkville (F.L. Cunningham, K. Hanson-Dorr); US Department of Agriculture, Fort Collins, Colorado, USA (J. Baroch, M.W. Lutman, T.J. DeLiberto); St. Jude Children’s Research Hospital, Memphis, Tennessee, USA (R. Webby)

Main Article

Table 2

Seroprevalence of influenza D virus among 256 feral swine, by age group and sex, Hawaii, North Carolina, Oklahoma, and Texas, United States, October 1, 2012–September 30, 2013*

Characteristic, no. samples D/13N
 D/46N
 Total seropositive swine, no. (%)
Seropositive swine, no. (%) GMT (range) Seropositive swine, no. (%) GMT (range)
Age
Juvenile, n = 32 6 (18.8) 63.5 (1:40–1:160) 1 (3.1) 80.0 (1:80–1:80) 7 (21.9)
Subadult, n = 43 6 (14.0) 40.0 (1:40–1:40) 2 (4.7) 40.0 (1:40–1:40) 8 (18.6)
Adult, n = 181
 27 (14.9)
 65.1 (1:40–1:160)
15 (8.3)
 58.8 (1:40–1:160)
 34 (18.8)
Sex
F, n = 135 23 (17.0) 62.9 (1:40–1:160) 10 (7.4) 54.0 (1:40–1:160) 28 (20.7)
M, n = 118 16 (13.6) 56.6 (1:40–1:160) 8 (6.8) 61. 7 (1:40–1:160) 21 (17.8)

*D/13N and D/46N were used in HAI assays with 0.5% turkey red blood cells. Seropositivity defined as HAI titer >1:40. Sex unknown for 3 animals. D/13N, influenza D/bovine/C00013N/Mississippi/2014 virus; D/46N, influenza D/bovine/C00046N/Mississippi/2014 virus; GMT, geometric mean titer; HAI, hemagglutination inhibition.

Main Article

1These authors contributed equally to this article.

2Current affiliation: South China Agricultural University, Guangzhou, China.

Page created: May 17, 2018
Page updated: May 17, 2018
Page reviewed: May 17, 2018
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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