Table 1.
Characteristics an influenza serological assay results of pigs sampled with serum specimen collections, January 2011 to November 2012
|
Location |
Pigs studied |
Number sampled |
Number (%) with ILI |
Number (%) with serological evidence of avian H9N2 infection |
Number (%) with serological evidence of avian H7N9 infection |
Number (%) with serological evidence of H1N1 pdm09 infection |
|||
|---|---|---|---|---|---|---|---|---|---|
| HI assay ≥1:20 | MN assay ≥1:80 | HI assay ≥1:20 | MN assay ≥1:80 | HI assay ≥1:20 | MN assay ≥1:80 | ||||
| Jiangsu |
Weaning pigs |
84 |
18(21.4) |
8(9.5) |
4(4.8) |
0(0) |
0(0) |
22(26.2) |
14(16.7) |
| |
Finishing pigs |
120 |
12(10) |
14(11.7) |
8(6.7) |
2(1.7) |
0(0) |
48(40.0) |
22(18.3) |
| |
Sows |
92 |
12(13.0) |
18(19.5) |
12(13.0) |
4(4.3) |
0(0) |
28(30.4) |
18(19.6) |
| Zhejiang |
Weaning pigs |
92 |
10(10.9) |
6(6.5) |
2(2.2) |
0(0) |
0(0) |
34(37.0) |
10(10.9) |
| |
Finishing pigs |
124 |
20(16.1) |
14(11.3) |
8(6.5) |
0(0) |
0(0) |
40(32.3) |
26(21.0) |
| |
Sows |
108 |
18(16.7) |
24(22.2) |
16(14.8) |
4(3.7) |
0(0) |
40(37.0) |
20(18.5) |
| Guangdong |
Weaning pigs |
152 |
22(14.5) |
10(6.6) |
4(2.6) |
0(0) |
0(0) |
50(32.9) |
16(10.5) |
| |
Finishing pigs |
124 |
8(6.5) |
16(12.9) |
12(9.7) |
2(1.6) |
0(0) |
36(45.2) |
28(22.6) |
| |
Sows |
152 |
24(15.8) |
32(21.1) |
26(17.1) |
8(5.3) |
0(0) |
66(43.4) |
36(23.7) |
| Fujian |
Weaning pigs |
78 |
14(17.8) |
6(7.7) |
4(5.1) |
0(0) |
0(0) |
26(33.3) |
10(12.8) |
| |
Finishing pigs |
94 |
6(6.4) |
12(12.8) |
6(6.4) |
4(4.3) |
0(0) |
36(38.3) |
18(19.1) |
| |
Sows |
90 |
8(8.9) |
18(20.0) |
10(11.1) |
2(2.2) |
0(0) |
38(42.2) |
20(22.2) |
| Total | 1310 | 172(13.3) | 178(13.6) | 112 (8.5) | 26(2.0) | 0(0) | 464(35.4) | 238(18.2) | |
ILI = influenza-like-illness; HI = horse RBC hemagglutination inhibition assay; MN = microneutralization assay; H9N2 = A/chicken/Guangdong/V/2008(H9N2); H1N1 = A/California/7/2009pandemic (H1N1) ; H7N9 = A/Guangdong/GH074/2013(H7N9).