Table 1.
Tembusu virus (TMUV) seroprevalence in domestic ducks in Northern China, 2009–2015
| Sampling date | Sampling site | Species | No. sera | b-ELISA positive | Positive rate |
|---|---|---|---|---|---|
| 2009 | Hebei | laying duck | 120 | 0 | 0% |
| 2009 | Beijing | laying duck | 80 | 0 | 0% |
| 2011.03 | Hebei | layingducka | 289 | 289 | 100% |
| 2011.03 | Beijing | breeding ducka | 80 | 80 | 100% |
| 2011.03 | Shandong | breeding ducka | 60 | 60 | 100% |
| 2012. 11 | Beijing | laying duckb | 152 | 18 | 11.84% |
| 2012. 12 | Beijing | laying duckb | 96 | 9 | 9.38% |
| 2013. 01 | Beijing | laying duckb | 122 | 12 | 9.83% |
| 2013.03 | Beijing | table ducklingb | 90 | 0 | 0% |
| 2013. 04 | Beijing | table ducklingb | 176 | 0 | 0% |
| 2013.06 | Beijing | laying duckb | 180 | 6 | 3.33% |
| 2013.08 | Beijing | laying duckb | 190 | 25 | 13.16% |
| 2013.12 | Beijing | table ducklingb | 106 | 4 | 3.77% |
| 2015.05 | Beijing | table ducklingb | 50 | 0 | 0% |
| 2015.09 | Hebei | breeding duckb | 80 | 0 | 0% |
| 2015.12 | Hebei | breeding duckc | 241 | 79 | 32.78% |
| 2015.12 | Beijing | breeding duckc | 237 | 226 | 95.36% |
aThe sera were from the animals suffered from DTMUV infection in December 2010
bThe sera were from the animals with no history of DTMUV infection and immunization
cThe sera were from the animals immunized with autogenous vaccine of DTMUV within one year