Statistic

95% CI

% of positive

No. of negative

No. of positive

Total investigated buffaloes

Variables

Location

χ² = 1.404 df = 2 P = 0.496

3.92 - 12.65

7.1

130

10

140

Dhi Qar

5.64 - 15.05

9.3

136

14

150

Baghdad

2.92 - 10.86

5.7

132

8

140

Maysan

Sex

χ² = 1.086 df = 1 P = 0.297

0.52 - 14.91

2.9

33

1

34

Male

5.57 - 10.9

7.8

365

31

396

Female

Age

χ² = 10.519 df = 2 P = 0.005*

0.34 - 10.12

1.9

51

1

52

<2 years

3.32 - 9.07

5.5

239

14

253

2 - 4 years

8.67 - 20.7

13.6

108

17

125

>4 years

Herd size

χ² = 9.353 df = 2 P = 0.009*

7.5 - 15.4

10.8

214

26

240

Small (<20)

1.66 - 8.69

3.8

125

5

130

Median (20 - 50)

0.3 - 8.86

1.7

59

1

60

Large (>50)

Season

χ² = 9.979 df = 3 P = 0.011*

4.11 - 15

8.0

92

8

100

Spring

1.3 - 8.25

3.3

116

4

120

Summer

2.15 - 11.18

5.0

95

5

100

Autumn

8.44 - 21.29

13.6

95

15

110

Winter

Presence of cats

χ² = 7.842 df = 1 P = 0.005*

7.16 - 14.53

10.3

236

27

263

Yes

1.28 - 6.81

3.0

162

5

167

No

5.32 - 10.31

7.4

398

32

430

Total