Margaret,
This is taken from Dr. C.'s explanation of the Western Blot from lymenet.org
“39: Unknown what this antigen is, but based on research at the National Institute of Health (NIH), other Borrelia (such as Borrelia recurrentis that causes relapsing fever), do not even have the genetics to code for the 39 kDa antigen, much less produce it. It is the most specific antibody for borreliosis of all.
41: Flagella or tail. This is how Borrelia burgdorferi moves around, by moving the flagella. Many bacteria have flagella. This is the most common borreliosis antibody.
In my clinical experience, if a patient has symptoms suspicious for borreliosis, and has one or more of the following bands, there is a very high probability the patient has borreliosis.
These bands are 18, 22, 23-25, 28, 30, 31, 34, 37, 39, 41, 83, and 93.
You should read the whole explanation because there is a lot of insight into the testing.
kim