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Journal of Clinical Microbiology, Jun 1997, 1433-1444, Vol 35, No. 6
U Hauser, G Lehnert, R Lobentanzer and B Wilske
Western blots (WBs; immunoblots) are a widely used tool for the
serodiagnosis of Lyme borreliosis, but so far, no defined criteria for
performance, analysis, and interpretation have been established in Europe.
For the current study WBs were produced with strains PKa2 (Borrelia
burgdorferi sensu stricto), PKo (Borrelia afzelii), and PBi (Borrelia
garinii). To improve resolution we used gels of 17 cm in length. In a first
step, 13 immunodominant proteins were identified with monoclonal
antibodies. Then, the apparent molecular masses of all visually
distinguishable bands were determined densitometrically. Approximately 40
bands of between 14 and 100 kDa were differentiated for each strain. From a
study with 330 serum samples (from 189 patients with Lyme borreliosis and
141 controls), all observed bands were documented. To establish criteria
for a positive WB result, the discriminating ability of a series of band
combinations (interpretation rules) were evaluated separately for each
strain (for immunoglobulin G [IgG] WB, > 40 combinations; for IgM WB,
> 15 combinations). The following interpretation criteria resulting in
specificities of greater than 96% were recommended: for IgG WB, at least
one band of p83/100, p58, p56, OspC, p21, and p17a for PKa2; at least two
bands of p83/100, p58, p43, p39, p30, OspC, p21, p17, and p14 for PKo; and
at least one band of p83/100, p39, OspC, p21, and p17b for PBi; for IgM WB,
at least one band of p39, OspC, and p17a or a strong p41 band for PKa2; at
least one band of p39, OspC, and p17 or a strong p41 band for PKo; and at
least one band of p39 and OspC or a strong p41 band for PBi. The overall
sensitivity was the highest for PKo WB, followed by PBi and PKa2 WB, in
decreasing order. Standardization of WB assays is necessary for comparison
of results from different laboratories.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Interpretation criteria for standardized Western blots for three European species of Borrelia burgdorferi sensu lato
Max von Pettenkofer-Institut fur Hygiene und Medizinische Mikrobiologie der Ludwig-Maximilians-Universitat Munchen, Munich, Germany.
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