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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 3

Characterization of HA, NA, and M gene segments of influenza virus A from agricultural fairs with >1 pig testing positive for influenza virus A, Ohio, USA, 2009–2011*

Fair Year
2009 2010 2011
A H1N2 Negative Negative
B H3N2 Negative H3N2
C H3N2 H3N2 H1N2, H3N2
D Negative H3N2 H1N2, H3N2
E Negative H3N2 Negative
F Negative Negative H3N2
G Negative H3N2
H H1N2, H3N2

*Fair G did not participate in 2009; fair H did not participate in 2009 or 2010. Boldface indicates North American triple-reassortant swine-origin influenza A virus M gene segment; underlining indicates influenza A(H1N1)pdm09 virus M gene segment. HA, hemagglutinin; NA, neuraminidase; M, matrix.

Main Article