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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