Volume 18, Number 12—December 2012
Research
Subclinical Influenza Virus A Infections in Pigs Exhibited at Agricultural Fairs, Ohio, USA, 2009–2011
Andrew S. Bowman
, Jacqueline M. Nolting, Sarah W. Nelson, and Richard D. Slemons
, Jacqueline M. Nolting, Sarah W. Nelson, and Richard D. Slemons
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.
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