The U.S. counties where we found ticks capable of carrying disease

Citizen-scientists collected and provided the ticks evaluated in the study as part of Bay Area Lyme Foundation’s Free Tick Testing program (2016-2019). This map shows the distribution by county of the tick species collected, including western blacklegged tick, blacklegged tick, American dog tick, lone star tick. White counties indicate areas without tick submissions. 

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Map #2: Where blacklegged ticks are carrying disease-causing bacteria 

Map #3: Where western blacklegged ticks are carrying disease-causing bacteria 

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