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Journal of Clinical Microbiology, 08 1997, 1931-1937, Vol 35, No. 8
AM Bergmans, MF Peeters, JF Schellekens, MC Vos, LJ Sabbe, JM Ossewaarde, H Verbakel, HJ Hooft and LM Schouls
The diagnostic value of the detection of immunoglobulin G (IgG) and IgM by
Bartonella henselae-based indirect fluorescence assay (IFA) and
enzyme-linked immunoassay (EIA) for the diagnosis of cat scratch disease
(CSD) was evaluated. The IFA was performed either with B. henselae that was
cocultivated for a few hours with Vero cells or with noncocultivated B.
henselae as the antigen. Additionally, the performance of a Bartonella PCR
hybridization assay based on the 16S rRNA gene was determined and compared
with those of the serologic assays. The study group consisted of 45
patients suspected of suffering from CSD by fulfilling one or more of the
classical criteria. The specificities of the immunoassays were set at >
or = 95% by analysis of sera from 60 healthy blood donors. It is shown that
the sensitivities of the IgG assays are very low (40.9% for the IFA with
noncocultivated B. henselae as antigen) and that those of the IgM assays
are higher (71.4% for the EIA) for patients who fulfilled two or more
criteria for CSD. The IgM EIA showed the highest sensitivity: 71.4% in
patients with two or more criteria for CSD and 80.6% for patients with a
positive Bartonella PCR result. The results indicate that the specificities
of both IFA and EIA IgG serologies and the sensitivity of the IFA IgM
serology need to be improved. The PCR hybridization assay showed a
sensitivity of 86.4% for patients who fulfilled two or more criteria for
CSD and 100% for seven patients who fulfilled three or more criteria. The
kinetics of IgG and IgM antibody production were studied in 18 patients
with CSD on the basis of a positive B. henselae IFA IgM serology. The
results indicate that there is no standard course of anti- B. henselae IgG
and IgM production in patients with CSD, because some patients produced
high levels of both IgG and IgM, others produced only high levels of IgM,
and a few patients produced only low levels of antibodies.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Pitfalls and fallacies of cat scratch disease serology: evaluation of Bartonella henselae-based indirect fluorescence assay and enzyme-linked immunoassay
Research Laboratory for Infectious Diseases, National Institute of Public Health and the Environment, Bilthoven, The Netherlands.
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