U.S. Regional Map of Lyme disease, Canine Ehrlichiosis, Heartworm, Anaplasma

Where tick-borne diseases are found

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Home > Disease Maps

Where tick-borne diseases are found

The following maps highlight the number of reported positive cases of ehrlichiosis (E.canis), Lyme disease, heartworm disease and anaplasmosis in dogs across all regions of the United States. Because so many dogs go untested for tick-borne diseases, the actual number of dogs infected by ticks is likely many times higher than what is shown here.