I would agree that there are so many variables with Lymes that can give you false positives and also false negatives on your skin tests. I have a friend who was a med student and doing an internship with an allergist. I was her "test subject" for a paper she was writing and we first did the skin tests, I came back positive for mold, yeast, wheat, grass, potato, rice, orange and bananas.
We did a blood test and all that came back was wheat and mold. 60 days later we did another skin test and NONE of the tests showed positive. Now what was interesting was that 60 days later we did another skin tests while I was herxing and everything possible was positive.
After all was said and done, I am highly allergic to wheat (gluten). I avoid all gluten like the plague.