IgM antibody responses to the circumsporozoite protein in naturally acquired falciparum malaria
- 1 September 1988
- journal article
- conference paper
- Published by Springer Nature in Journal of Clinical Immunology
- Vol. 8 (5) , 342-348
- https://doi.org/10.1007/bf00917149
Abstract
The circumsporozoite (CS) protein on the surface of sporozoites is the major target for antibody response(s) to the infective stage of the malaria parasite. Sera from malaria endemic areas contain both IgM and IgG antibodies that react with a dominant epitope in the tetrapeptide repeat region of the CS protein. In order to characterize the IgM CS antibody response inPlasmodium falciparum (PF) malaria, a prospective study was conducted in Thai Rangers. Variable IgM responses against the CS protein were detected in 81% of 47 PF-infected subjects. Similar to IgG response kinetics, IgM levels rose to a peak 6–10 days after detection of parasitemia and showed an apparent serum half-life of less than 25 days. The classic difference in isotype ratio (IgG/IgM) between primary and secondary antibody responses was observed to bloodstage, but not CS, antigens.Keywords
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