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Table 1 Univaraible analysis of Bluetongue infection in camels in relation to different variables

From: A survey of bluetongue infection in one-humped camels (Camelus Dromedarius); seroprevalence and risk factors analysis

Variable

No of examined camels

No of test positives

No of negative

% of positive

95%CI

χ2statistic & p-value

Locality

 Qalyubia

85

9

76

10.6

5.6–18.9

32.844 d = 3 P < 0.0001*

 Kafr ElSheikh

75

11

64

14.7

8.3–24.3

 Mersa matrouh

120

31

89

25.8

18.8–34.3

 Aswan

120

51

69

42.5

34–51.4

Age

  ≤ 2

50

14

36

28.0

17.4–41-6

2.539 d = 2 P = 0.28

  > 2–5

190

54

136

28.4

22.4–35.2

  > 5

160

34

126

21.3

15.6–28.2

Sex

 Male

180

29

151

16.1

11.4–22.2

15.186 d = 1 P < 0.0001*

 Female

220

73

147

33.2

12.5–22.3

Herd size

  ≤ 50

240

57

183

23.8

18.8–29.5

0.967 d = 1 P = 0.32

  ≥ 51

160

45

115

28.1

21.7–35.5

Season

 Autumn

84

25

59

29.8

21–40.3

24.322 d = 3 P < 0.0001*

 Summer

138

52

86

37.7

30–46

 Winter

85

10

75

11.8

6.5–20.3

 Spring

93

15

78

16.1

10–24.9

Insect presence

 Yes

290

85

205

29.3

24.3–34.8

8.059 d = 1 P = 0.005*

 No

110

17

93

15.5

9.8–23.4

 Total

400

102

298

25.5

21.4–29.9

  1. *The result is significant at P < 0.05