TABLE 2.
Cross-reactivities of feral swine serum samples against influenza A viruses in hemagglutination inhibition assays
| Virus | Antigenic group | Source of virusa | No. of seropositive samples (%)b | GMT (LB–HB)c |
|---|---|---|---|---|
| A/swine/Minnesota/02093/2008 | H1N1-α | Domestic swine | 44 (14.67) | 138.85 (40–1,280) |
| A/swine/Minnesota/A01394082/2013 | H1N2-α | Domestic swine | 20 (6.67) | 80 (40–320) |
| A/swine/Nebraska/A01399642/2013 | H1N1-β | Domestic swine | 58 (19.33) | 124.49 (40–1,280) |
| A/swine/Nebraska/A01240348/2011 | H1N1-β | Domestic swine | 57 (19.00) | 146.94 (40–1,280) |
| A/swine/Indiana/13TOSU0832/2013 | H1N1-γ | Domestic swine | 54 (18.00) | 204.19 (40–1,280) |
| A/swine/Indiana/13TOSU1154/2013 | H1N1-γ | Domestic swine | 53 (17.67) | 187.19 (40–1,280) |
| A/swine/Illinois/A01076767/2010 | H1N1-γ2 | Domestic swine | 5 (1.67) | 45.95 (40–80) |
| A/swine/South Dakota/A01349306/2013 | H1N1-γ2 | Domestic swine | 63 (21.00) | 271.32 (40–1,280) |
| A/swine/Iowa/15/2013 | H1δ1 | Domestic swine | 12 (4.00) | 75.51 (40–160) |
| A/swine/Iowa/18/2013 | H1δ2 | Domestic swine | 22 (7.33) | 600.92 (40–1,280) |
| A/swine/Iowa/19/2013 | H1δ2 | Domestic swine | 12 (4.00) | 59.93 (40–320) |
| A/swine/Iowa/7/2013 | H12009p | Domestic swine | 91 (30.33) | 264.51 (40–1,280) |
| A/swine/Iowa/8/2013 | H12009p | Domestic swine | 81 (27.00) | 301.39 (40–1280) |
| A/California/04/2009 | H12009p | Human | 61 (20.33) | 212.57 (40–1,280) |
| A/mallard/Wisconsin/A00751454/2009 | H1N1 | Avian | 13 (4.33) | 75.85 (40–640) |
| A/mallard/Oregon/A0030758/2007 | H2N3 | Avian | 0 | 0 |
| A/swine/Ohio/09SW96/2009 | H3N2-α | Domestic swine | 84 (28.00) | 105.04 (40–1,280) |
| A/swine/Ohio/10SW215/2010 | H3N2-β | Domestic swine | 117 (39.00) | 140.45 (40–1,280) |
| A/swine/Ohio/11SW347/2011 | H3N2-β | Domestic swine | 93 (31.00) | 146.31 (40–1,280) |
| A/swine/Texas/A01104013/2012 | H3N2-β | Feral swine | 123 (41.00) | 64.58 (40–1,280) |
| A/Perth/16/2009 | H3N2 | Human | 177 (59.00) | 109.86 (40–1,280) |
| A/Wisconsin/112/2010 | H3N2v | Human (spillover from domestic swine) | 119 (39.67) | 153.61 (40–1,280) |
| A/Pennsylvania/14/2010 | H3N2v | Human (spillover from domestic swine) | 89 (29.67) | 89.91 (40–640) |
| A/Minnesota/10/2011 | H3N2v | Human (spillover from domestic swine) | 105 (35.00) | 106.96 (40–640) |
| A/Iowa/07/2011 | H3N2v | Human (spillover from domestic swine) | 118 (39.33) | 148.24 (40–1,280) |
| A/Victoria/361/2011 | H3N2 | Human | 195 (65.00) | 154.18 (40–1,280) |
| A/mallard/Wisconsin/A00661712/2009 | H3N2 | Avian | 1 (0.33) | 80 (±0.00) |
| A/blue-winged teal/Colorado/A00170379/2006 | H3N8 | Avian | 0 | 0 |
| A/mallard/Washington/A00714770/2009 | H4N6 | Avian | 0 | 0 |
| A/mallard/Wisconsin/10os3845/2010 | H5N2 | Avian | 0 | 0 |
| A/mallard/Oregon/A00571208/2007 | H6N1 | Avian | 0 | 0 |
| A/mallard/Ohio/648/2002 | H6N2 | Avian | 1 (0.33) | 40 (±0.00) |
| A/bufflehead/Virginia/A00120022/2008 | H7N2 | Avian | 1 (0.33) | 40 (±0.00) |
| A/American black duck/Delaware/A00870108/2010 | H7N3 | Avian | 0 | 0 |
| A/northern shoveler/Illinois/10os3632/2010 | H8N4 | Avian | 0 | 0 |
| A/mallard/Minnesota/10os4670/2010 | H9N2 | Avian | 0 | 0 |
| A/northern shoveler/Arkansas/11os386/2011 | H9N2 | Avian | 0 | 0 |
| A/mallard/South Dakota/A00536114/2007 | H10N7 | Avian | 0 | 0 |
| A/mallard/Illinois/10OS3249/2010 | H11N2 | Avian | 0 | 0 |
| A/mallard/Wisconsin/10OS2889/2010 | H11N9 | Avian | 0 | 0 |
| A/American green-winged teal/Missouri/10OS4622/2010 | H12N4 | Avian | 0 | 0 |
| A/bufflehead/Wisconsin/10OS3204/2010 | H12N5 | Avian | 0 | 0 |
| A/hooded merganser/New Brunswick/03750/2009 | H13N6 | Avian | 0 | 0 |
| A/white-winged scooter/Wisconsin/10OS3922/2010 | H14 | Avian | 0 | 0 |
| A/long-tailed duck/Wisconsin/10OS3912/2010 | H14N6 | Avian | 0 | 0 |
a
The host from which the virus was isolated.
b
Serum samples were determined to be positive against a testing virus if the associated HI titer was ≥1:40.
c
The geometric mean titer (GMT) was calculated for each group of positive samples. HB, high boundary of HI titer; LB, low boundary of HI titer.