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Table 1 Univariate analysis for the association between BTV infection and the potential risk factors

From: Prevalence of bluetongue virus infection and associated risk factors among cattle in North Kordufan State, Western Sudan

Risk factors

Animals tested

Animals affected (%)

df

χ2

p-value

Locality

  

5

4.181

0.524

Abuzabad

57

14(24.6%)

   

Um Ruwaba

58

9(15.5%)

   

Bara

36

7(19.4%)

   

Shiekan

60

9(15%)

   

Ennuhud

40

11(27.5%)

   

Elkhuwaye

48

8(16.7%)

   

Age

  

1

13.03

0.001

Young

119

11(9.2%)

   

Old

180

47(26.1%)

   

Sex

  

1

1.99

0.159

female

262

54(20.6%)

   

male

54

4(10.8%)

   

Breed

  

1

0.399

0.368

Indigenous

272

54(19.9%)

   

Cross

27

4(14.8%)

   

Body condition

  

1

5.491

0.012

Bad

234

52(22.2%)

   

Good

65

6(9.2%)

   

Animal source

  

2

0.165

0.921

-Raised on farm

213

41(19.2%)

   

Purchased from other farm

8

2(2.5%)

   

purchased from local market

78

15(19.2%)

   

Grazing system

  

2

1.097

0.578

Stationary

73

15(20.5%)

   

Nomadic

50

12(24%)

   

Semi nomadic

176

31(17.6%)

   

Herd size

  

2

1.321

0.517

Small

66

16(24.2%)

   

Medium

98

17(17.3%)

   

Large

135

25(18.5%)

   

Vector control

  

1

18.506

0.001

No

167

47(28.1%)

   

Yes

132

11(8.3%)

   

Other animal

  

1

0.189

0.387

No

152

28(18.4%)

   

Yes

147

30(20.4%)

   

Farm yard

  

1

0.259

0.358

Outside

115

24(20.9%)

   

Indoor

184

34(18.5%)

   

Milk production

  

2

0.680

0.712

No

159

33(20.8%)

   

Low

131

24(18.3%)

   

High

9

1(11.1%)

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