Table 1 Univariate analysis for the association between potential risk factors and BTV infection among cattle in East Darfur State of Sudan using Chi-square test

Locality

4

18.77

0.01

Aldeain

60

31(51.6%)

Abugabra

44

25(56.8%)

Bahrelarab

94

70(74.4%)

Asalaya

10

10(100.0%)

Fardous

16

14(87.5%)

Age

1

18.69

0.01

Small

72

34 (47.2%)

Old

152

116(76.3%)

Sex

1

9.25

0.02

Female

170

123(72.3%)

Male

54

27(50%)

Breed

1

9.07

0.03

Endogenous

207

133(64.2%)

Cross

17

17(100.0%)

Body condition

1

0.30

0.58

Thin

206

139(67.5%)

Fat

18

11(61.1%)

Animal source

2

17.17

0.01

Raised on farm

166

110(66.3%)

Purchased from other farms

36

32(88.9%)

Purchased from local market

22

8(36.4%)

Grazing system

1

1.29

0.25

Stationary

94

59(62.7%)

Nomadic

130

91(70%)

Herd size

2

5.14

0.08

Small

40

26(65%)

Medium

83

63(75.9%)

Large

101

61(60.4%)

Insect presence

1

7.48

0.01

No

48

17(35.4%)

Yes

176

133(75.5%)