Fig. 4.

Evidence of antibody to Anaplasma spp. in dogs by county, grouped according to percent positive tests. Few results (< 30 per year) were received from counties shaded gray, precluding interpretation of the presence of antibody in dogs from these areas. Counties with at least 210 results available for the 7-year period were shaded according to the following code: no dogs reported as positive (0%, white), 0.1–0.5% (light green), 0.5–1.0% (green), 1.1–5.0% (dark green), and > 5.0% (very dark green)