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