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Table 2 Association of cyst positivity in mice after bioassay of chicken tissues with potential explanatory variables

From: Majority of T. gondii seropositive chickens (Gallus domesticus) in Central Ethiopia carries the infective parasite

Variable and category

No. examined

No. cyst positive (%)

95%confidence interval

District

   

Fentale

6

2 (33.3)

4.3 - 77.9

Adea

15

9 (60.0)

32.3 - 83.7

Ambo

20

13 (65.0)

40.8 - 84.6

Altitude

   

Low land

6

2 (33.3)

4.3 - 77.9

Mid land

25

16 (64.0)

42.5 - 82.0

High land

10

6 (60.0)

26.2 - 87.8

Breed

   

Local

40

23 (57.5)

40.9 - 73.0

Exotic

1

1 (100.0)

0.025 - 1**

Sex

   

Male

8

5 (62.5)

24.5 - 91.5

Female

33

19 (57.6)

39.2 - 74.5

Age

   

≤ 6 months

7

2 (28.6)

3.7 - 71.0

7- 12 months

10

5 (50.0)

18.7 - 81.3

≤ 13 months

24

17 (70.8)

48.9 - 87.4

Residence

   

Rural

22

10 (45.5)

24.4 - 67.8

Urban & periurban

19

14 (73.7)

48.8 - 90.9

DAT end titer

   

≤ 60

8

2 (25.0)

3.2 - 65.1

180

5

2 (40.0)

5.3 - 85.3

540

7

7 (100.0)

59.0 - 1**

1620

15

10 (66.7)

38.4 - 88.2

6000

2

0 (0.0)

0 - 84.2 **

18000

3

2 (66.7)

9.4 - 99.2

54000

1

1 (100.0)

0.025 - 1**

  1. *DAT end titer of chickens was significantly associated with isolation of brain tissue cysts in mice (P = 0.037). The likelihood of cyst positivity is higher from chicken with high antibody titer, **one-sided 97.5% confidence interval.