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COMPARATIVE STUDY
EVALUATION STUDIES
JOURNAL ARTICLE
Lyme Borreliosis Serology: Performance of Several Commonly Used Laboratory Diagnostic Tests and a Large Resource Panel of Well-Characterized Patient Samples.
Journal of Clinical Microbiology 2016 November
The current recommendation for the laboratory confirmation of Lyme disease is serology-based diagnostics. Specifically, a standardized two-tiered testing (STTT) algorithm is applied that utilizes a first-tier immunofluorescence assay or enzyme immunoassay (EIA) that, if the result is positive or equivocal, is followed by second-tier immunoblotting. Despite the standardization and performance achievements, STTT is considered technically complex and subjective, as well as insensitive for early acute infection. These issues have prompted development of novel algorithms and testing platforms. In this study, we evaluated the performance of several commonly used assays for STTT. Several modified two-tiered testing (MTTT) algorithms, including a 2-EIA algorithm and modified criteria for second-tier IgG immunoblots, were also evaluated. All tests were performed on sera from a recently available, well-defined archive of positive- and negative-control patients. Our study demonstrates differences in the results between individual first- and second-tier tests, although the overall agreement of the different STTT algorithms used was strong. In addition, the MTTT algorithm utilizing 2-EIAs was found to be equivalent to all STTT algorithms tested, with agreement ranging from 94 to 97%. The 2-EIA MTTT algorithm slightly enhanced sensitivity in early disease compared to the STTT algorithms evaluated. Furthermore, these data add to the mounting evidence that a 2-EIA-based MTTT algorithm, where immunoblotting is replaced by the C6 EIA, performs as well or better than STTT.
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