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Table 5 Percent positive test results (canine seroprevalence) for states with increasing trend (P < 0.0001) in antibodies to Anaplasma phagocytophilum

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
Northeast
 Massachusetts (n = 1,464,062) 9.1 14.3 57.1 0.0759 (0.0726–0.0792)
 Maine (n = 660,847) 8.5 13.2 55.3 0.1111 (0.1056–0.1167)
 New Hampshire (n = 485,522) 7.3 13.7 87.7 0.1614 (0.1550–0.1678)
 Pennsylvania (n = 1,911,290) 2.6 4.4 69.2 0.1377 (0.1320–0.1435)
 Vermont (n = 197,082) 4.1 9.6 134.2 0.2601 (0.2474–0.2729)
  1. aTotal number of test results
  2. bGamma calculated for annual results for each state from 2010 through 2017, inclusive