Table 1.
Seroprevalence of avian-origin H3N2 SIV, avian-origin H4N8 SIV, avian-origin H6N6 SIV, and H5N1 AIV in swine farms in different provinces of southern China
| Province or sample group | H3N2 |
H4N8 |
H5N1 |
H6N6 |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. examined | % seroprevalence (no. positive/total no.)a |
No. examined | % seroprevalence (no. positive/no. total)a |
No. examined | % seroprevalence (no. positive/total no.)a |
No. examined | % seroprevalence (no. positive/total no.)a |
|||||
| VN | HI | VN | HI | VN | HI | VN | HI | |||||
| Guangdong | 300 | 2 (6/300) | 1.0 (3/300) | 300 | 2.3 (7/300) | 0.7 (2/300) | 300 | 0 (0/300) | 0 (0/300) | 300 | 2.7 (8/300) | 0 (0/300) |
| Guangxi | 280 | 0 (0/280) | 0 (0/280)c | 280 | 2.9 (8/280) | 0.4 (1/280) | 280 | 0 (0/280) | 0 (0/280) | 280 | 1.4 (4/280) | 0 (0/280) |
| Fujian | 200 | 2 (4/200) | 0 (0/200) | 200 | 0 (0/200) | 0 (0/200) | 200 | 0 (0/200) | 0 (0/200) | 200 | 2.5 (5/200) | 0 (0/200) |
| Jiangxi | 300 | 0 (0/300) | 0 (0/300) | 300 | 0.7 (2/300) | 0.7 (2/300) | 300 | 0 (0/300) | 0 (0/300) | 300 | 0.7 (2/300) | 0 (0/300) |
| GD2001b | 550 | 0 (0/550) | 0 (0/550) | 550 | 0 (0/550) | 0 (0/550) | 550 | 0 (0/550) | 0 (0/550) | 550 | 0 (0/550) | 0 (0/550) |
| Totalc | 1,080 | 0.93 (10/1,080) | 0.27 (3/1,080) | 1,080 | 1.6 (17/1,080) | 0.5 (5/1,080) | 1,080 | 0 (0/1,080) | 0 (0/1,080) | 1,080 | 1.8 (19/1,080) | 0 (0/1,080) |
a
HI titers of ≥40 or VN titers of ≥40 are considered seropositive results and indicate previous infection.
b
Five hundred fifty serum samples were collected from apparently healthy pigs in Guangdong Province in 2001.
c
The total does not include the 550 serum samples that were collected in 2001.