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Antibody testing in Lyme disease. A comparison of results in four laboratories
B S Schwartz1, M D Goldstein, J M Ribeiro
1Section of General Internal Medicine, University of Pennsylvania, Philadelphia.
Insights
Lyme disease serological testing shows low agreement between laboratories. Standardizing these tests is crucial for reliable Lyme disease diagnosis and patient care.
Area of Science:
- Infectious Diseases
- Medical Diagnostics
- Public Health
Background:
- Lyme disease is a significant public health concern, particularly in outdoor worker populations.
- Accurate serological testing is essential for diagnosing Lyme disease.
- Variability in testing performance can impact diagnostic accuracy and patient management.
Purpose of the Study:
- To assess the interlaboratory and intralaboratory agreement of Lyme disease serological tests.
- To identify potential inconsistencies in Lyme disease diagnostic testing across different laboratory settings.
Main Methods:
- Serum specimens from 132 outdoor workers in New Jersey were distributed to four independent laboratories.
- Testing included a state health department, a commercial laboratory, and two research laboratories.
- The kappa statistic was used to measure agreement in test performance.
Main Results:
- Interlaboratory agreement, measured by the kappa statistic, ranged from 0.45 to 0.53.
- Intralaboratory agreement within the commercial laboratory ranged from 0.50 to 0.54.
- These kappa values indicate low levels of agreement in Lyme disease serological testing.
Conclusions:
- Current Lyme disease serological testing procedures exhibit low interlaboratory and intralaboratory agreement.
- Standardization of Lyme disease serological testing is recommended to improve comparability of results.
- Improved standardization is necessary for reliable diagnosis and management of Lyme disease.
Abstract:
To evaluate the interlaboratory and intralaboratory agreement in the performance of Lyme disease serological testing, we sent serum specimens from 132 outdoor workers in New Jersey to as many as four independent laboratories. These included one state department of health laboratory, one large commercial laboratory, and two research laboratories. The measurement of agreement employed, the kappa statistic, ranged from .45 to .53 among the four laboratories and from .50 to .54 within the commercial laboratory. These values represent low levels of agreement. The data suggest that Lyme disease serological testing procedures should be standardized so that Lyme disease test results are more comparable between laboratories.