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Addendum Regarding Lyme Serology
There are nine known [Lyme] Borrelia burgdorferi Genus species specific KDA Western Blot antibodies (bands): 18, 23, 31, 34, 37, 39, 83 and 93.
Only one of these Borrelia burgdorferi genus specific bands is needed to confirm that there is serological evidence of exposure to the Borrelia burgdorferi spirochete and can confirm a clinical diagnosis of Lyme Disease.
CDC Western Blot IgM surveillance criteria includes only two burgdorferi genus species specific antibodies for IgM 23 and 39 and excludes the other seven Borrelia burgdorferi antibodies.
CDC Western Blot IgG surveillance criteria includes 18, 23, 30, 37, 39 and 93 and excludes bands 31, 34 and 83.
It does not make sense to exclude any Borrelia burgdorferi genus species-specific antibodies in a Lyme Western Blot, and to include only two of these antibodies in IgM because all the antibodies in IgG were once IgM.
IgM converts to IgG in about two months unless there is a persisting infection driving a persisting IgM reaction. This is the case with any infection including a Borrelia burgdorferi induced Lyme disease.
The CDC wrongfully includes five non-specific cross-reacting antibodies in its Western Blot surveillance criteria: 28, 41, 45, 58 and 66. This leads to the possibility of false positive Lyme Western Blots. There can be no false positives if only Borrelia burgdorferi genus species-specific antibodies are considered. One can have a CDC surveillance positive IgG Lyme Western Blot with the five non-specific antibodies without having any Borrelia burgdorferi genus species specific antibodies.
This does not make sense.
The CDC recommends that the Lyme Western Blot be performed only if there is a positive or equivocal Lyme ELISA. In my practice of over 6000 children with Lyme disease, 30% with a CDC positive Lyme Western Blot have negative ELISA's. The Lyme ELISA is a poor screening test. An adequate screening test should have false positives, not false negatives.
Rev. 2/25/04
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(you go Doc J )
With love,
Lishka