Trends in canine seroprevalence of Borrelia burgdorferi and Anaplasma
Twenty million canine tests from 2010-2017 in 25 states and 905 counties in the eastern USA were evaluated. The results showed a decreasing trend in seroprevalence to B. burgdorferi in eight states along the mid-Atlantic coast from Virginia to New Hampshire, and in Wisconsin. The results also showed an increasing trend in five northeastern and Midwestern states where Lyme borreliosis is endemic or emerging, as well as in three southern states.
Anaplasma spp. also showed a significant decreasing trend in five states along the mid-Atlantic coast from Virginia to Connecticut and Rhode Island, as well as in Minnesota and Wisconsin in the Midwest and an increasing trend was evident in Massachusetts and three states in northern New England as well as in Pennsylvania.
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