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Table 2 Provincial temporal changes in canine vector-borne pathogen seroprevalence in Canada (2008, 2015) for Borrelia burgdorferi, Ehrlichia and Anaplasma spp., and the antigen of Dirofilaria immitis

From: Prevalence of Borrelia burgdorferi, Anaplasma spp., Ehrlichia spp. and Dirofilaria immitis in Canadian dogs, 2008 to 2015: a repeat cross-sectional study

Province

Year

B. burgdorferi

Ehrlichia spp.

Anaplasma spp.

D. immitis

Positive (%)a

P b

Percent changec

Positive (%)a

P b

Percent changec

Positive (%)a

P b

Percent changec

Positive (%)a

P b

Percent changec

Alberta

2008

1/253 (0.4)

0.08

25.0

4/253 (1.6)

<0.001

325.0

2/221 (0.9)

0.02

133.3

0/253 (0)

0.1

na

2015

7/1335 (0.5)

91/1335 (6.8)

28/1335 (2.1)

1/1335 (0.07)

British Columbia

2008

0/94 (0)

0.8

na

2/94 (2.1)

0.5

176.2

0/81 (0)

0.03

na

0/94 (0)

0.09

na

2015

4/1201 (0.3)

69/1201 (5.8)

26/1201 (2.2)

4/1201 (0.3)

Manitoba

2008

23/1713 (1.3)

<0.001

146.2

0/1713 (0)

<0.001

na

5/1619 (0.3)

0.001

233.3

1/1713 (0.06)

<0.001

733.3

2015

391/12,253 (3.2)

45/12,253 (0.4)

118/12,253 (1.0)

61/12,253 (0.5)

New Brunswick

2008

1/15 (6.7)

0.08

31.3

0/15 (0)

0.5

na

0/15 (0)

0.2

na

0/15 (0)

0.07

na

2015

53/604 (8.8)

3/604 (0.5)

8/604 (1.3)

3/604 (0.5)

Newfoundland

2008

np

0.5

na

np

0.2

na

np

0.2

na

np

0.2

na

2015

3/55 (5.5)

1/55 (1.8)

1/55 (1.8)

1/55 (1.8)

Nova Scotia

2008

7/290 (2.4)

<0.001

441.7

1/290 (0.3)

0.3

166.7

0/264 (0)

<0.001

na

0/290 (0)

0.5

na

2015

194/1490 (13.0)

13/1490 (0.8)

37/1490 (2.5)

0/1490 (0)

Ontario

2008

31/5018 (0.6)

<0.001

216.7

4/5018 (0.08)

<0.001

400.0

4/4949 (0.08)

0.8

275.0

16/5018 (0.3)

0.1

-33.3

2015

2799/146,056 (1.9)

627/146,056 (0.4)

424/146,055 (0.3)

213/146,056 (0.2)

Prince Edward Island

2008

np

0.2

na

np

na

na

np

na

na

np

na

na

2015

0/1 (0)

0/1 (0)

0/1 (0)

0/1 (0)

Quebec

2008

6/694 (0.9)

<0.001

233.3

1/694 (0.1)

<0.001

600.0

1/692 (0.14)

0.001

185.7

3/694 (0.4)

<0.001

-25.0

2015

539/18,068 (3.0)

128/18,068 (0.7)

68/18,068 (0.4)

54/18,068 (0.3)

Saskatchewan

2008

0/5 (0)

0.8

na

0/5 (0)

0.6

na

0/5 (0)

na

na

0/5 (0)

0.8

na

2015

1/140 (0.7)

0/140 (0)

0/140 (0)

0/140 (0)

Yukon

2008

np

na

na

np

0.9

na

np

na

na

np

na

na

2015

0/2 (0)

0/2 (0)

0/2 (0)

0/2 (0)

Canada

2008

69/8082 (0.9)

<0.001

144.4

12/8082 (0.2)

<0.001

150.0

12/7846 (0.2)

0.8

100.0

20/8082 (0.3)

0.3

-33.3

2015

3991/181,205 (2.2)

977/181,205 (0.5)

710/181,204 (0.4)

337/181,205 (0.2)

  1. aPercent Positive = (number positive/number tested) Ă— 100%
  2. bP-value for non-parametric Cuzick test of annual trend 2008 through 2015; 2009–2014 data not shown
  3. cPercent Change = (percent positive 2015 – percent positive 2008)/percent positive 2008 ×100%
  4. Abbreviations: na, unable to calculate due to low or zero counts; np, no testing reported