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Blacklegged Tick Surveillance

Published by National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Vector-borne Diseases (DVBD) | U.S. Department of Health & Human Services | Catalog Last Checked: September 28, 2026 at 08:25 PM
Blacklegged Tick Surveillance: county-level surveillance data showing the geographic distribution of the blacklegged tick (Ixodes scapularis, a primary Lyme disease vector) in the US.

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