viral infections and band 31?

From what I can find, Band 31 is still considered to be highly specific for Lyme, not from some viral thing. Band 31 corresponds to Osp A (Outer Surface Protein "A").
www.ncbi.nlm.nih.gov/pubmed/10638032?dopt=Abstract

Interesting, I'm just relaying information someone from Igenex told me because my band 31 was indeterminate. He said that they can do additional testing to confirm if it is from Lyme or not. He said usually that band means Lyme but it could be set off on rare occasions by the viral infections I listed above. Perhaps they just want more or my money though.

Cant find a ton of info about it but this from a previous post on this site :
"According to the Igenex web site, Band 31 can be positive for other reasons like EBV and so they have a band 31 epitope test that does further testing to see if band 31 is positive specifically due to Lyme or not and so it can give you confirmation as to if it is due to Lyme or not.

This is from the Igenex website.

"The Lyme IgG or IgM 30-31kDA confirmation test is a qualitative immunoblot assay that determines whether 30 and/or 31kDA bands present on a Lyme IgG or IgM western blot are due to B. burgdorferi specific antibodies or not. B. burgdorferi specific epitope(s) - 30 and/or 31kDA, are denatured and separated by SDS polyacrylamide gel electrophoresis, blotted onto nitrocellulose membranes and cut into strips for the use of Lyme 30-31kDA Western Blot Confirmation Test. It is known that Western blots, especially IgM, can give false positive results with some viruses. This test would be very useful to rule out false positives when 30 and/or 31kDa bands are present on the Western blots."

And further down the page after some more technical stuff...

"...Based on this data, we recommend that further testing is not necessary if in addition to 30 and/or 31kDa bands, two of the following bands (23-25, 34, 39,41 and 83-93 kDa), are present on the Western blot. Otherwise, the 30-31kDA confirmation test should be used to confirm whether 30-31kDa bands present on the Lyme Western blots are due to B. burgdorferi specific antibodies or not. If the 30-31kDa confirmation test is negative, we recommend that patient’s sera be tested for viral antibodies."

So if you have 2 of those bands in brackets as positive, then they consider you positive and not to bother with extra testing. But if not, then testing band 31 can give confirmation that it is due to Lyme and not a false positive. And if that comes back negative, then they suggest testing for various viruses to see if that is why band 31 and maybe some others bands are due to EBV, CMV or other viruses."

and this from truthaboutlymedisease "31 outer surface protein A (OspA), specific for Bb - Has cross-reactivity with several different types of viruses"

and the fact that i spoke with a Dr. from Igenex about it. It appears to be quite specific to Lyme if positive but if theres false positives or INDs in 31 it can be due to viral infections. Guess there isnt much more info out there about this. Thanks.