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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