Influenza A(H1N1)pdm09 Virus among Healthy Show Pigs, United States
Gregory C. Gray , Jeffrey B. Bender, Carolyn B. Bridges, Russell F. Daly, Whitney S. Krueger, Michael J. Male, Gary L. Heil, John A. Friary, Robin B. Derby, and Nancy J. Cox
Author affiliations: University of Florida, Gainesville, Florida, USA (G.C. Gray, W.S. Krueger, G.L. Heil, J.A. Friary, R.B. Derby); University of Minnesota, St. Paul, Minnesota, USA (J.B. Bender); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (C.B. Bridges, N.J. Cox); South Dakota State University, Brookings, South Dakota, USA (R.F. Daly); and University of Iowa, Iowa City, Iowa, USA (M.J. Male)
Figure. . . . Show pigs with nasal swab specimens positive for influenza A virus by real-time reverse transcription PCR, Minnesota and South Dakota state fairs, 2009. MN, Minnesota; SD, South Dakota. White, total number of pigs swabbed; gray, pigs testing positive for influenza A by real-time reverse transcription PCR.
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