Table 1 Results from the analysis of blood samples collected for surveillance purposes from sows in slaughterhouses and tested using the hemagglutination inhibition test
From: The first detection of influenza in the Finnish pig population: a retrospective study
Year | Number of animals tested | H1N1 positive animals (%) | H1N2 positive animals (%) | H3N2 positive animals (%) |
|---|---|---|---|---|
2007 | 1192 | 1 (0.08) | 14 (1.2) | 11 (0.9) |
2008 | 938 | 0 (0) | 16 (1.7) | 31 (2.6) |
2009 | 1101 | 171 (15.5) | 3 (0.3) | 11 (1) |