Table 1 Number of sites and incidence rate by PEDV introduction events, geographical region and intervention timeframe
Geographic region | Pre-intervention | Post-intervention | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Number of PEDV introductions | Farm-weeks at risk | Incidence rate per 100 farm-weeks (95%CI) | Number of PEDV introductions | Farm-weeks at risk | Incidence rate per 100 farm-weeks (95%CI) | |||||
0 | 1 | 2 | 0 | 1 | 2 | |||||
A | 26 | 22 | 0 | 698 | 3.15 (2.09–4.73) | 48 | 0 | 0 | 1297 | 0.00 (0.00–0.30) |
B | 8 | 1 | 0 | 118 | 0.85 (0.15–4.64) | 6 | 3 | 0 | 285 | 1.05 (0.36–3.05) |
C | 42 | 8 | 0 | 916 | 0.87 (0.44–1.71) | 47 | 3 | 0 | 1695 | 0.18 (0.06–0.52) |
D | 8 | 0 | 0 | 160 | 0.00 (0.00–2.34) | 8 | 0 | 0 | 296 | 0.00 (0.00–1.28) |
E | 18 | 14 | 0 | 543 | 2.58 (1.54–4.28) | 31 | 1 | 0 | 916 | 0.11 (0.02–0.62) |
F | 13 | 5 | 0 | 248 | 2.02 (0.86–4.63) | 13 | 5 | 0 | 509 | 0.98 (0.42–2.28) |
G | 13 | 9 | 0 | 318 | 2.83 (1.50–5.29) | 21 | 1 | 0 | 648 | 0.15 (0.03–0.87) |
H | 3 | 5 | 0 | 118 | 4.24 (1.82–9.54) | 7 | 1 | 0 | 209 | 0.48 (0.08–2.66) |
I | 14 | 21 | 1 | 548 | 4.20 (2.81–6.22) | 32 | 4 | 0 | 1175 | 0.34 (0.13–0.87) |
J | 15 | 9 | 0 | 297 | 3.03 (1.60–5.66) | 17 | 6 | 1 | 792 | 1.01 (0.51–1.98) |
K | 14 | 5 | 0 | 228 | 2.19 (0.94–5.03) | 15 | 3 | 1 | 534 | 0.94 (0.40–2.17) |
Total | 174 | 99 | 1 | 4192 | 2.41 (1.99–2.92) | 245 | 27 | 2 | 8356 | 0.37 (0.26–0.53) |