Here is the site that I use to help interpret them:
www.reocities.com/HotSprings/Oasis/6455/western-blot.txt You can go there to find supportive Pubmed articles for each of these bands.
An IgM result means that you have an active infection. It once was thought to mean an 'early' infection, but has since been revised.
IgG means that the infection is at a later stage. The more +'s you have beside a number, the stronger the reaction.
IND means indeterminate - not negative, but not quite strong enough to be "fully positive". But it means that you reacted on those bands and should be considered, especially when they are Lyme specific bands.
A "Lyme specific band" means specific for Borrelia Burgdorferi, sensu stricto - Lyme disease in the strictest sense. There is only
one on the over 300 known strains of Lyme that is considered Bb, ss. Nothing else will turn a Lyme specific band positive other than Lyme disease.
Bands 18 & 41 (whether in IgM or IgG) are indicative of the tail of the bacteria, which can cross react with other Spirochetal bacteria such as Relapsing Fever, Pintas and Yaws, and Syphilis.
Band 31 indicates OspA (Outer Surface Protein "A") and is specific for Lyme.
Band 39 indicates BmpA (Bacterial Membrane Protein "A") and is specific for Lyme.
Band 83 indicates a high molecular mass protein and is specific for Lyme.
Band 93 indicates an immunodominant protoplasmic cylinder antigen and is specific for Lyme.