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Table 3 Prevalence of Wolbachia in dogs positive for Dirofilaria immitis divided according to the microfilaria load and the range of Ct value of qPCR

From: Interaction between Wolbachia pipientis and Leishmania infantum in heartworm infected dogs

Groups

Knott test

n dogs

qPCR Wolbachia

mfs load

Ct = 0

Prevalence (%); 95% CI

25 ≤ Ct ≤ 30

Prevalence (%); 95% CI

30 < Ct ≤ 34

Prevalence (%); 95% CI

Ct > 35

Prevalence (%); 95% CI

G1

Dim + /Leis + 

5 ≤ low ≤ 200

18

7

38.9; 0.173–0.643

2d

11.1; 0.014–0.347

4

22.2; 0.064–0.476

5

27; 0.097–0.535

200 < medium ≤ 300

10

3

30; 0.067–0.652

3

30; 0.067–0.652

1

10; 0.003–0.445

3

30; 0.067–0.652

High ≥ 600

19

0

12c,d

63.2; 0.384–0.837

5c

26.3; 0.091–0.51

2c

30; 0.067–0.652

Tot

 

47

10

21.3; 0.107–0.357

17

36.2; 0.227–0.515

10

21.3; 0.107–0.357

10

21.3; 0.107–0.357

G2

Dim + /Leis−

1 ≤ low ≤ 200

20

5

25%; 0.087–0.491

5

25; 0.087–0.491

6

30; 0.119–0.543

4

20; 0.057–0.437

200 < medium ≤ 300

11

0

5

54.5; 0.234–0.833

6

54.5; 0.234–0.833

0

0

High ≥ 400

15

0

8e

53.3; 0.266–0.787

6e

40; 0.163–0.677

1e

6.7; 0.002–0.319

Tot

 

46

5

10.9; 0.036–0.236

18

39.1; 0.251–0.546

18

39.1; 0.251–0.546

5

10.9; 0.036–0.236

Total

  

93

15

16.1; 0.093–0.252

35a

37.6; 0.278–0.483

28b

30.1; 0.210–0.405

15a,b

16.1; 0.093–0.252

  1. Ct = threshold value, 95% CI = 95% confidence level. Statistically significant differences in prevalence are marked with equal superscript letters. P-value < 0.05