I received my results back from my western blot test and by CDC standards, I am negative. I had no bands present for IgM. I had bands 18 and 66 present for IgG. Band 66, apparently is not specific to lyme. As for band 18, there seems to be different opinions on whether it is Lyme specific or not. Is it possible that something, other than Lyme, can cause a positive for band 18?