Distribution of Lyme disease vectors in the US.

Distribution of Lyme disease vectors in the US


The map shows the established and reported distribution of the Lyme disease vectors in the United States, by county, 1907-1996.


'Established' is defined as at least six ticks or two life stages (larvae, nymphs or adults) being identified; 'reported' is defined as at least one tick being identified.

From: What do Lyme disease and syphilis have in common?

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