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Table 4 The seroprevalence of Leptospira Hardjo in individual animals in a Leptospiral seroprevalence study: data presented by region, age, sex and breeding herd size

From: Seroprevalence of Leptospira Hardjo in the Irish suckler cattle population

Category

ELISA Negative

ELISA Positive

Total Tested

Apparent Prevalence (%)

True Prevalence (%)

95% Confidence Interval

Region

1

558

453

1011

44.81

36.32

34.67 - 37.96

2

518

500

1018

49.12

41.29

39.64 - 42.93

3

436

482

918

52.51

45.20

43.47 - 46.93

4

468

399

867

46.02

37.72

35.94 - 39.49

5

399

489

888

55.07

48.16

46.40 - 49.91

6

330

334

664

50.30

42.66

40.62 - 44.69

Age

Unknown

29

37

66

56.06

49.30

42.88 - 55.71

1–2 yrs

763

726

1489

48.76

40.88

39.51 - 42.23

2–3 yrs

207

180

387

46.51

38.28

35.62 - 40.94

3–5 yrs

776

777

1553

50.03

42.35

41.01 - 43.67

5–9 yrs

527

527

1054

50.00

42.31

40.69 - 43.92

>9 yrs

407

410

817

50.18

42.52

40.68 - 44.35

Sex

Unknown

29

37

66

56.06

49.30

42.88 - 55.71

Female

2570

2514

5084

49.45

41.67

40.93 - 42.41

Male

110

106

216

49.07

41.23

37.66 - 44.80

Breeding Herd Size

≤13

453

325

778

41.77

32.81

30.95 - 34.67

14–23

824

709

1533

46.25

37.98

36.64 - 39.32

24–32

624

572

1196

47.83

39.80

38.29 - 41.32

33–142

808

1051

1859

56.54

49.85

48.64 - 51.06

ALL

2709

2657

5366

49.52

41.75

41.03 - 42.47