Presence of IgM antibodies to Trypanosoma cruzi urinary antigen in sera from patients with acute Chagas' disease.


An 80-kilodalton Trypanosoma cruzi antigen is eliminated in the urine of infected hosts during the acute stage of Chagas' disease. We show that affinity-purified urinary antigen is recognised by IgM antibodies in the sera from acute chagasic patients. Comparing our urinary antigen assay with that using a whole T. cruzi lysate antigen for IgM antibody… (More)


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