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Published on: February 4, 2018
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Multicenter Clinical Evaluation of Modified Two-Tiered Testing Algorithms for Lyme Disease Using Zeus Scientific
Maroun M Sfeir1, Jennifer K Meece2, Elitza S Theel3
1UConn Health, Farmington, Connecticut, USA.
Journal of Clinical Microbiology
|April 14, 2022
Summary
Modified two-tiered testing (MTTT) for Lyme disease (LD) offers improved sensitivity in early stages compared to standard testing. These enzyme immunoassay-based methods are effective alternatives for diagnosing LD.
Area of Science:
- Infectious Diseases
- Immunology
- Medical Diagnostics
Background:
- Standard two-tiered testing (STTT) for Lyme disease (LD) relies on enzyme immunoassays (EIAs) followed by immunoblots.
- Modified two-tiered testing (MTTT) algorithms utilize sequential EIAs without immunoblots, requiring FDA clearance for clinical use.
Purpose of the Study:
- To evaluate the performance of two distinct MTTT algorithms using Zeus Scientific EIAs as alternatives to STTT for Lyme disease diagnosis.
- To assess the sensitivity and specificity of MTTT algorithms in retrospective and prospective patient cohorts.
Main Methods:
- Two MTTT algorithms were evaluated: MTTT 1 (VlsE1/pepC10 EIA followed by WCS EIA) and MTTT 2 (VlsE1/pepC10 EIA followed by separate IgM/IgG WCS EIAs).
- Performance was compared against STTT using archived samples from LD patients and controls (retrospective phase).
- Prospective evaluation involved analyzing consecutive samples from three clinical laboratories.
Main Results:
- In the retrospective phase, MTTTs 1 and 2 showed higher sensitivity (56%, 74%) than STTT (41%) in acute erythema migrans (EM) patients.
- Sensitivity was comparable (96-100%) in patients with later-stage LD manifestations (neuroborreliosis, carditis, arthritis).
- Specificity was high and comparable across all algorithms (≥99%) in control subjects.
- Prospective analysis (n=2,932) showed high agreement between MTTT 1 and STTT (97.4%), while MTTT 2 had higher positive agreement (98%) but slightly lower negative agreement (96.1%).
Conclusions:
- MTTT algorithms provide increased sensitivity for early Lyme disease detection compared to STTT.
- These EIA-only approaches offer comparable sensitivity in later disease stages and maintain high specificity.
- MTTT algorithms are viable alternatives to STTT for Lyme disease serodiagnosis, pending FDA clearance of the EIAs.
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