Table 2 Influenza A, H5, H7 and H9 nucleic acid positivity rates of different sample types
Type/subtype | Positivity rate (%) | ||||
|---|---|---|---|---|---|
(Number of positive samples/Number of samples collected) | |||||
Year | Sewage | Chopping board | Feeding trough | Cage | Faeces |
Influenza A | |||||
2014 | 37.31 (2819/7556) | 33.49 (2373/7085) | 26.15 (2138/8175) | 17.81 (2538/14252) | 12.92 (2617/20259) |
2015 | 39.03 (3025/7750) | 33.74 (3217/9535) | 28.19 (2300/8158) | 19.76 (3196/16174) | 15.05 (3333/22141) |
2016 | 40.17 (3774/9394) | 40.25 (4558/11324) | 27.64 (2797/10121) | 24.01 (4013/16711) | 18.79 (4503/23962) |
2017 | 31.03 (4559/14692) | 27.03 (4712/17433) | 22.48 (3450/15347) | 18.19 (4715/25919) | 12.34 (4398/35648) |
2018 | 35.37 (3190/9020) | 30.99 (3074/9919) | 23.73 (2613/11011) | 19.47 (3122/16035) | 13.87 (3237/23347) |
Mean ± SD | 36.58 ± 3.59 | 33.1 ± 4.82 | 25.64 ± 2.46 | 19.85 ± 2.46 | 14.59 ± 2.56 |
A/H5 | |||||
2014 | 14.56 (1100/7556) | 7.86 (2373/7085) | 7.38 (2138/8175) | 2.15 (2538/14252) | 1.9 (385/20259) |
2015 | 12.12 (939/7750) | 7.07 (674/9535) | 6.06 (494/8158) | 2.35 (380/16,174) | 1.89 (418/22,141) |
2016 | 9.59 (901/9394) | 9.04 (1024/11324) | 4.48 (453/10121) | 2.59 (433/16711) | 2.18 (522/23962) |
2017 | 5.64 (828/14692) | 4.37 (762/17433) | 2.42 (372/15347) | 1.48 (383/25919) | 0.99 (353/35648) |
2018 | 9.20 (830/9020) | 8.11 (804/9919) | 3.54 (390/11011) | 2.56 (411/25919) | 1.77 (413/23347) |
Mean ± SD | 10.22 ± 3.34 | 7.29 ± 1.77 | 4.78 ± 1.97 | 2.23 ± 0.45 | 1.75 ± 0.44 |
A/H7 | |||||
2014 | 4.74 (358/7556) | 6.68 (473/7085) | 3.61 (295/8175) | 3.96 (564/14252) | 2.35 (477/20259) |
2015 | 4.25 (329/7750) | 6.12 (584/9535) | 3.33 (272/8158) | 3.52 (569/16174) | 2.81 (622/22141) |
2016 | 5.8 (545/9394) | 8.9 (1008/11324) | 2.93 (297/10121) | 4.3 (718/16711) | 3.19 (765/23962) |
2017 | 5.73 (842/14692) | 6.31 (1100/17433) | 4.06 (624/15347) | 3.65 (946/25919) | 2.59 (924/35648) |
2018 | 0.68 (61/9020) | 0.44 (44/9919) | 0.27 (30/11011) | 0.28 (45/16035) | 0.28 (66/23347) |
Mean ± SD | 4.24 ± 2.09 | 5.69 ± 3.13 | 2.84 ± 1.49 | 3.14 ± 1.62 | 2.24 ± 1.14 |
A/H9 | |||||
2014 | 19.1 (1443/7556) | 17.12 (1213/7085) | 15.40 (1259/8175) | 9.12 (1300/14252) | 5.98 (1212/20259) |
2015 | 24 (1860/7750) | 19.17 (1828/9535) | 19.48 (1589/8158) | 12.06 (1951/16174) | 8.05 (1782/22141) |
2016 | 23.32 (2191/9394) | 21.3 (2412/11324) | 16.47 (1667/10121) | 13.44 (2246/16711) | 9.32 (2234/23962) |
2017 | 18.48 (2715/14692) | 14.34 (2505/1433) | 13.12 (2013/15347) | 11.4 (2954/25919) | 6.36 (2266/35648) |
2018 | 23.16 (2089/9020) | 21.82 (2164/9919) | 14.52 (1599/11011) | 14.72 (2360/16035) | 8.89 (2075/23347) |
Mean ± SD | 21.62 ± 2.6 | 18.75 ± 3.09 | 15.80 ± 2.39 | 12.14 ± 2.12 | 7.72 ± 1.49 |