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Table 2 Animal-level and within herd SBV seroprevalence in previously exposed Irish dairy herds in 2014 and 2015, with number of positives animals and respective TP (true prevalence) rates in each herd/animal group

From: Post-epidemic Schmallenberg virus circulation: parallel bovine serological and Culicoides virological surveillance studies in Ireland

  Sampling period 1 Sampling period 2 Sampling period 3
Spring 2014 Winter 2014 Winter 2015
Whole herd Seronegative animals Youngstock Youngstock
Herd ID Herd size No. of positives Herd TP (%) Cows TP (%) Heifers TP (%) Sample size No. of positives Cows positive Heifers positive Herd size No. of positives Sample size No. of positives
1 148 101 69.9 99.5 2.3 Farmer opted out of study
2 390 198 52 72.2 0 86 1 0 1 99 0 94 0
3 180 15 8.5 10.7 2.2 75 0 0 0 30 0 29 0
4 196 138 72.1 96.2 0 30 1 0 1 44 1 43 0
5 117 85 74.4 94.7 0 16 1 1 0 20 0 20 0
6 106 79 76.4 92 0 9 1 0 1 75 0 66 0
7 284 166 59.9 71.2 0 55 3 2 1 28 0 28 0
8 169 119 72.1 91.7 0 14 0 0 0 33 0 32 0
9 73 58 81.4 100 0 8 0 0 0 20 0 20 0
10 241 27 11.5 16.2 0 87 0 0 0 79 0 77 0
11 142 59 42.6 63 0 36 0 0 0 39 0 23 0
12 379 261 70.6 95.8 1 52 2 2 0 106 0 105 0
13 338 232 70.3 99.9 1 53 1 0 1 106 1 106 0
14 123 88 73.3 100 0 18 1 1 0 36 0 35 0
15 283 180 77.5 99.2 0 43 0 0 0 84 1 81 0
16 561 435 79.4 100 0 55 2 2 0 118 1 115 0
17 338 209 63.4 96.5 0 50 1 1 0 77 1 76 0
18 217 143 67.5 90.4 0 34 0 0 0 81 1 62 0
19 206 169 84.1 98.9 0 17 0 0 0 50 0 49 0
20 163 94 59.1 89.1 1.8 32 0 0 0 81 0 76 0
21 89 65 74.8 95 5.1 6 0 0 0 34 0 9 0
22 212 117 56.5 77.5 3.4 50 1 1 0 66 1 65 0
23 106 66 63.8 96.6 0 19 0 0 0 44 0 41 0
24 218 154 72.4 99.9 0 27 0 0 0 115 0 114 0
25 113 26 23.6 30.6 0 37 0 0 0 35 0 30 0
26 139 91 67.1 100 2.1 24 0 0 0 50 0 44 0
Total 5531 3375 62.5 84.7 0.6 933 15 10 5 1550 7 1440 0