title: Defined Plasmodium falciparum antigens in malaria serology.
abstract: The study evaluates three enzyme-linked immunosorbent assays (ELISA) of malaria antigens suitable for use in large-scale epidemiological studies. Results obtained using sera from 567 persons from the Gambia indicated that the micro-ELISA method using parasitized red blood cell extract did not reliably quantitate antimalarial antibodies, especially in young children. In contrast, two micro-ELISA methods that employed purified, defined antigens (a polypeptide of M(r) = 41 000 present in rhoptries, and a 31-1 fusion polypeptide corresponding to a merozoite surface antigen) permitted the precise determination of antimalarial antibodies in both adults and children. Problems and advantages associated with the use of the M(r) = 41 000 and 31-1 antigens for the determination of antimalarial antibodies are discussed.
mesh_terms: D000953:Antigens, Protozoan / Q000276:immunology*; D002352:Carrier Proteins / Q000276:immunology; D004797:Enzyme-Linked Immunosorbent Assay; D006801:Humans; D008288:Malaria / Q000276:immunology*; D010963:Plasmodium falciparum / Q000276:immunology*
chemical_list: D000953:Antigens, Protozoan; D002352:Carrier Proteins