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Table 2 Percent positive test results (canine seroprevalence) for states with increasing trend (P < 0.0001) in antibodies to Borrelia burgdorferi

From: Trends in canine seroprevalence to Borrelia burgdorferi and Anaplasma spp. in the eastern USA, 2010–2017

State (n)a

Percent positive tests

Change (%)

Gamma (95% CI)b

2010

2017

Midwest

 Iowa (n = 387,236)

3.0

4.0

33.3

0.0915 (0.0802–0.1028)

 Michigan (n =1,137,522)

1.0

1.5

50.0

0.0137 (0.0037–0.0237)

Northeast

 Maine (n = 666,337)

14.1

14.2

0.7

0.0205 (0.0159–0.0261)

 New York (n = 1,999,391)

10.3

11.1

7.8

0.0457 (0.0427–0.0487)

 Pennsylvania (n = 1,955,701)

13.3

14.0

5.3

0.0278 (0.0251–0.0306)

Southeast

 North Carolina (n = 1,309,117)

1.9

2.3

21.1

0.0309 (0.0232–0.0387)

 South Carolina (n = 344,547)

1.0

1.2

20.0

0.0510 (0.0300–0.0720)

 West Virginia (n = 211,169)

1.3

8.1

523.1

0.2224 (0.2105–0.2343)

  1. aTotal number of test results
  2. bGamma calculated for annual results for each state from 2010 through 2017, inclusive