I became ill after 9 days hiking the AT in Shenandoah: fever 103.5, headache, chills, lethargy. Doc started Doxy (antibiotic) immediately, then ordered lots of tests. Most likely a false positive for Lyme, but we agreed to not do more expensive testing since I had been treated for anaplasmosis, Lyme, etc. by taking the antibiotics. I had used permethrin spray, and while I had seen many ticks, did not think I had been bitten. Never had the Lyme rash either. Only thing I could think of was that a tick got into my hair (long). I plan to make a sleeping cap and spray it with the permethrin before my next hike!