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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) × 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