Volume 18, Number 12—December 2012
Subclinical Influenza Virus A Infections in Pigs Exhibited 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.
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