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Table 2 Antibody titers of Chlamydia abortus infection in white yaks in Tianzhu Tibetan Autonomous County, China determined by indirect haemagglutination (IHA) test

From: Seroprevalence and risk factors of Chlamydia abortus infection in free-ranging white yaks in China

Biometric data

Category

Antibody titers

No. positive

No. tested

Prevalence (%)

1:16

1:32

1:64

1:128

1:256

Region

Zhuaxixiulong

10

7

2

1

1

21

73

28.77

Ā 

Xidatan

83

36

14

3

1

137

901

15.21

Sex

Male

24

18

7

1

0

50

289

17.30

Ā 

Female

69

25

9

3

2

108

685

15.78

Age (years)

ā‰¤ 1

11

1

2

0

0

14

115

12.17

Ā 

1ā€‰<ā€‰yrā€‰ā‰¤ā€‰2

22

2

3

0

0

27

180

15.00

Ā 

2ā€‰<ā€‰yrā€‰ā‰¤ā€‰3

15

15

5

1

0

36

175

20.57

Ā 

yrā€‰>ā€‰3

45

25

6

3

2

81

504

16.07

Season

Spring

18

3

3

0

0

24

220

10.91

Ā 

Autumn

17

8

1

0

0

26

231

11.26

Ā 

Winter

27

6

6

0

1

40

250

16.00

Ā 

Summer

31

26

6

4

1

68

273

24.91

Ā 

Total

93

43

16

4

2

158

974

16.22