Interlaboratory Reliability of Microimmunofluorescence Test for Measurement of Chlamydia pneumoniae -Specific Immunoglobulin A and G Antibody Titers

Author:

Littman Alyson J.12,Jackson Lisa A.13,White Emily12,Thornquist Mark D.2,Gaydos Charlotte A.4,Vaughan Thomas L.12

Affiliation:

1. Department of Epidemiology, University of Washington

2. Division of Public Health Sciences, Fred Hutchinson Cancer Research Center

3. Center for Health Studies, Group Health Cooperative, Seattle, Washington

4. Division of Infectious Diseases, Johns Hopkins University, Baltimore, Maryland

Abstract

ABSTRACT To evaluate the reliability of Chlamydia pneumoniae -specific immunoglobulin G (IgG) and IgA antibody titers as measured by the microimmunofluorescence (MIF) test, we compared results from 392 individuals using a standard MIF protocol at two academic laboratories. The kappas for dichotomous titers (≥16 versus <16) were 0.39 for IgA and 0.53 for IgG. Measurement error likely attenuates C. pneumoniae -disease associations; the magnitude of attenuation can be estimated from results of studies such as this one.

Publisher

American Society for Microbiology

Subject

Microbiology (medical),Clinical Biochemistry,Immunology,Immunology and Allergy

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