Just read this..hope it hasn't been posted yet:
"Recent research has found false-positive results in people without Lyme disease at 3 of 4 commercial US laboratories (ranging from 2.5% to 25%), with a rate of more than 50% of false positives at one lab."
www.sciencedaily.com/releases/2015/08/150831135838.htmI'd like to see more of the article but the .pdf looks to be on a pay site.