title: An example of auto-anti-A1 agglutinins.
abstract: The serum of an elderly man, group A, Le(a+b-), contained an IgM antibody that agglutinated his own cells and the cells of random group A1 donors. Over a period of 5 months, the titre of these auto-anti-A1 agglutinins was 4 at 22 degrees C.
mesh_terms: D000017:ABO Blood-Group System / Q000276:immunology*; D000368:Aged; D001323:Autoantibodies / Q000276:immunology*; D001788:Blood Grouping and Crossmatching; D003080:Cold Temperature; D004909:Erythrocyte Indices; D006386:Hemagglutination Tests; D006801:Humans; D007075:Immunoglobulin M / Q000276:immunology; D008297:Male
chemical_list: D000017:ABO Blood-Group System; D001323:Autoantibodies; D007075:Immunoglobulin M