title: "Naturally-occurring" anti-K1: possible association with mycobacterium infection.
abstract: We report a case of "naturally-occurring" (nonred blood cell stimulated) anti-K1. The patient had never received a blood transfusion. Red blood cell antibody screening panels showed agglutination with K:1 red blood cells at room temperature and not in the anti-globulin test. Testing with 2-mercaptoethanol showed the antibody to be IgM. The antibody is "naturally-occurring" and may be associated with pulmonary tuberculosis.
mesh_terms: D001323:Autoantibodies / Q000032:analysis; D001789:Blood Group Antigens; D006801:Humans; D007075:Immunoglobulin M / Q000032:analysis; D007518:Isoantibodies / Q000032:analysis*; D007626:Kell Blood-Group System; D008297:Male; D008875:Middle Aged; D014397:Tuberculosis, Pulmonary / Q000276:immunology*
chemical_list: D001323:Autoantibodies; D001789:Blood Group Antigens; D007075:Immunoglobulin M; D007518:Isoantibodies; D007626:Kell Blood-Group System