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- Title
Subclinical Influenza Virus A Infections in Pigs Exhibited at Agricultural Fairs, Ohio, USA, 2009-2011.
- Authors
Bowman, Andrew S.; Nolting, Jacqueline M.; Nelson, Sarah W.; Slemons, Richard D.
- Abstract
Agricultural fairs are associated with bidirectional, interspecies transmission of influenza virus A between humans and pigs. We examined pigs exhibited at agricultural fairs in Ohio during 2009-2011 for signs of influenza-like illness and collected nasal swab specimens from a representative subset of these animals. Influenza virus A was recovered from pigs at 12/53 (22.6%) fairs during the 3-year sampling period. Pigs at 10/12 (83.3%) fairs from which influenza virus A was recovered did not show signs of influenza-like illness. Hemagglutinin, neuraminidase, and matrix gene combinations of the isolates were consistent with influenza virus A concurrently circulating among swine herds in the United States. Subclinical influenza virus A infections in pigs at agricultural fairs may pose a risk to human health and create challenges for passive surveillance programs for influenza virus A in swine herds.
- Subjects
OHIO; INFLUENZA research; SWINE diseases; VIRUS diseases; INFLUENZA viruses; AGRICULTURAL exhibitions
- Publication
Emerging Infectious Diseases, 2012, Vol 18, Issue 12, p1945
- ISSN
1080-6040
- Publication type
Article
- DOI
10.3201/eid1812.121116