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Volume 18, Number 12—December 2012


Subclinical Influenza Virus A Infections in Pigs Exhibited at Agricultural Fairs, Ohio, USA, 2009–2011

Andrew S. BowmanComments to Author , Jacqueline M. Nolting, Sarah W. Nelson, and Richard D. Slemons
Author affiliations: The Ohio State University, Columbus, Ohio, USA

Main Article

Table 1

Clinical signs of ILI and influenza virus A recovery from pigs at agricultural fairs, Ohio, USA, 2009–2011*

Year No. participating fairs No. fairs with pigs with ILI No. (%) fairs with >1 pig testing positive for influenza virus A No. (%) fairs with subclinical influenza virus A infection in pigs
2009 15 0 3 (20.0) 3 (20.0)
2010 16 1 3 (18.8) 2 (12.5)
2011 22 1 6 (27.3) 5 (22.7)

*Influenza A virus was recovered from pigs at both fairs where there were pigs with ILI. ILI, influenza-like illness.

Main Article