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Journal of Clinical Microbiology, 01 1997, 92-97, Vol 35, No. 1
GC Gussenhoven, MA van der Hoorn, MG Goris, WJ Terpstra, RA Hartskeerl, BW Mol, CW van Ingen and HL Smits
We studied a dipstick assay for the detection of Leptospira-specific
immunoglobulin M (IgM) antibodies in human serum samples. A high degree of
concordance was observed between the results of the dipstick assay and an
IgM enzyme-linked immunosorbent assay (ELISA). Application of the dipstick
assay for the detection of acute leptospirosis enabled the accurate
identification, early in the disease, of a high proportion of the cases of
leptospirosis. Analysis of a second serum sample is recommended, in order
to determine seroconversion or increased staining intensity. All serum
samples from the patients who were confirmed to be positive for
leptospirosis by either a positive microscopic agglutination test or a
positive culture but were found to be negative by the dipstick assay were
also judged to be negative by the IgM ELISA or revealed borderline titers
by the IgM ELISA. Some cross-reactivity was observed for sera from patients
with diseases other than leptospirosis, and this should be taken into
account in the interpretation of test results. The dipstick assay is easy
to perform, can be performed quickly, and requires no electricity or
special equipment, and the assay components, a dipstick and a staining
reagent, can be stored for a prolonged period without a loss of reactivity,
even at elevated temperatures.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
LEPTO dipstick, a dipstick assay for detection of Leptospira-specific immunoglobulin M antibodies in human sera
Department of Biomedical Research, Royal Tropical Institute, AZ Amsterdam, The Netherlands.
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