Table 3.
Yearly prevalence of AIV detected and bird phenological event
| Year | Spring migration | Breeding | Autumn migration | Wintering | Total | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Prev (%) ± 95% CI | Pos/N | Prev (%) ± 95% CI | Pos/N | Prev (%) ± 95% CI | Pos/N | Prev (%) ± 95% CI | Pos/N | Prev (%) ± 95% CI | Pos/N | |
| 2007 | – | – | – | – | – | – | 0.0 | 0/95 | 0.0 | 0/95 |
| 2008 | 0.0 | 0/154 | 31.4 ± 16.2 | 11/35 | 2.1 ± 4.3 | 1/47 | 0.0 | 0/136 | 3.2 ± 1.8 | 12/372 |
| 2009 | 1.0 ± 2.0 | 1/98 | 18.2 ± 27.2 | 2/11 | 31.9 ± 9.7 | 29/91 | – | – | 16.0 ± 5.1 | 32/200 |
| Total 2007–2009 | 0.4 ± 0.8 | 1/252 | 28.3 ± 13.5 | 13/46 | 21.7 ± 7.0 | 30/138 | 0.0 | 0/231 | 6.6 ± 1.9 | 44/667 |
| 2012 | 0.0 | 0/214 | 1.0 ± 1.5 | 2/192 | 0.0 | 0/102 | 0.0 | 0/203 | 0.3 ± 0.4 | 2/711 |
| 2013 | 0.0 | 0/305 | 0.0 | 0/106 | 0.9 ± 0.8 | 4/465 | 0.3 ± 0.5 | 1/384 | 0.4 ± 0.3 | 5/1260 |
| 2014 | 0.0 | 0/159 | 0.3 ± 0.6 | 1/341 | 0.0 | 0/129 | 0.0 | 0/125 | 0.1 ± 0.3 | 1/754 |
| Total 2012–2014 | 0.0 | 0/678 | 0.5 ± 0.5 | 3/639 | 0.6 ± 0.5 | 4/696 | 0.1 ± 0.3 | 1/712 | 0.3 ± 0.2 | 8/2725 |
– Indicates not sampled.
Prev: AIV prevalence, CI: 95% confidence interval, N: number of samples analysed, Pos: number of AIV positive samples.