Invasive Tick Detected in 6 additional Tennessee counties – The Tennessee Department of Agriculture, United States Department of Agriculture – Animal and Plant Health Inspection Services, Tennessee Department of Health, and University of Tennessee Institute of Agriculture today announced the detection of the invasive Asian longhorned tick in an additional six Tennessee counties: Knox, Jefferson, Claiborne, Cocke, Putnam, and Sevier. The tick was detected in Union and Roane Counties in May.