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Volume 17, Number 5—May 2011

Dispatch

Multitarget Test for Emerging Lyme Disease and Anaplasmosis in a Serosurvey of Dogs, Maine, USA

Peter W. RandComments to Author , Eleanor H. Lacombe, Susan P. Elias, Bruce K. Cahill, Charles B. Lubelczyk, and Robert P. Smith
Author affiliations: Author affiliation: Maine Medical Center Research Institute, South Portland, Maine, USA

Main Article

Table 2

Risk factors vs. canine seroprevalence of Anaplasma phagocytophilum and Borrelia burgdorferi, Maine, USA, 2007*

Variable
No. dogs
Borrelia burgdorferi
Anaplasma phagocytophilum
No. (%) positive
OR (95% CI)
p value†
No. (%) positive
OR (95% CI)
p value†
Lyme vaccine
Yes 575 57 (9.9) 49 (8.5)
No
483
75 (15.3)
1.5 (1.1–2.1)
0.008

23 (4.8)
0.6 (0.3–0.9)
0.02
Travel‡
All dogs
None 357 49 (13.7) 27 (7.6)
>1
730
89 (12.2)
0.9 (0.6–1.3)
NS

50 (6.9)
0.9 (0.6–1.5)
NS
Unvaccinated dogs
None 163 21 (12.9) 8 (4.9)
>1
320
53 (16.6)
1.3 (0.8–2.3)
NS

15 (4.7)
0.9 (0.4–2.3)
NS
Tick control products
All dogs
No 182 20 (11.0) 7 (3.9)
Yes 899 115 (12.9) 1.2 (0.7–2.0) NS 66 (7.4) 2.0 (0.9–4.4) 0.08
Unvaccinated dogs
No 124 13 (10.5) 3 (2.4)
Yes
350
59 (16.9)
1.7 (0.9–3.3)
0.09

18 (5.1)
2.2 (0.6–7.6)
NS
History of unexplained lameness
No 877 97 (11.1) 42 (4.8)
Yes 191 40 (20.9) 2.1 (1.4–3.2) 0.0002 28 (15.2) 3.6 (2.1–5.9) <0.0001

*A total of 1,087 dogs were tested. OR, odds ratio; CI, confidence interval; NS, not significant.
†Significance based on Pearson χ2 statistic with 1 degree of freedom.
‡Trips away from town of residence.

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