title: Acquired B antigen: an ABO typing discrepancy successfully reversed by transfusion with type A red blood cells.
abstract: Two elderly type A patients were found to have acquired B antigen, one secondary to Escherichia coli and the other to Pseudomonas septicemia. One received a transfusion of type A red blood cells without any apparent sequelae. The mechanism and diagnosis of the acquired B antigen are discussed.
mesh_terms: D000017:ABO Blood-Group System; D000042:Absorption; D000368:Aged; D001788:Blood Grouping and Crossmatching; D001803:Blood Transfusion; D017707:Erythrocyte Transfusion; D004927:Escherichia coli Infections / Q000652:urine; D005260:Female; D006384:Hemagglutination; D006801:Humans; D008297:Male; D008875:Middle Aged; D011552:Pseudomonas Infections / Q000652:urine; D013290:Streptococcal Infections / Q000652:urine; D013997:Time Factors
chemical_list: D000017:ABO Blood-Group System