title: First two cases of immune hemolytic anemia associated with ceftizoxime.
abstract: BACKGROUND
  Second- and third-generation cephalosporins have been associated with immune-mediated hemolytic reactions. This report discusses two patients who developed clinically significant extravascular hemolysis while receiving the third-generation cephalosporin ceftizoxime (Ceftizox). This is believed to be the first time hemolysis has been described in patients receiving this drug.
  
  
  METHODS
  Immunologic workup of drug-dependent antibodies was performed on blood samples using drug-coated and immune complex methodologies. Antibody classes and titers were analyzed.
  
  
  RESULTS
  Both the patients' sera contained anti-ceftizoxime that reacted with red cells only when ceftizoxime was added to the sera ("immune complex" method). The patients recovered without complications following discontinuation of the drug. Each patient had IgM and IgG drug-dependent antibodies. The drug-induced antibodies from each patient cross-reacted with cefotaxime, which is structurally similar to ceftizoxime, but cross-reacted either weakly or not at all with ceftriaxone, which has a more complex side chain.
  
  
  CONCLUSIONS
  This report describes the first cases of immune hemolytic anemia associated with ceftizoxime. In drug-induced hemolytic reactions, prompt recognition and discontinuation of the drug may be important factors in reducing the chance of serious sequelae.
authors.affiliation: Department of Medicine (Hematology/Oncology), The University of Chicago, Illinois 60637, USA.
authors.forename: J M
authors.initials: JM
authors.lastname: Shammo
authors.forename: B
authors.initials: B
authors.lastname: Calhoun
authors.forename: A M
authors.initials: AM
authors.lastname: Mauer
authors.forename: P C
authors.initials: PC
authors.lastname: Hoffman
authors.forename: J M
authors.initials: JM
authors.lastname: Baron
authors.forename: B W
authors.initials: BW
authors.lastname: Baron
mesh_terms: D000328:Adult; D000368:Aged; D000744:Anemia, Hemolytic, Autoimmune / Q000139:chemically induced*; D000906:Antibodies / Q000097:blood; D000936:Antigen-Antibody Complex / Q000276:immunology; D015296:Ceftizoxime / Q000009:adverse effects* / Q000276:immunology; D002511:Cephalosporins / Q000009:adverse effects* / Q000276:immunology; D003298:Coombs Test; D005260:Female; D006461:Hemolysis / Q000276:immunology; D006801:Humans; D007518:Isoantibodies / Q000097:blood; D008297:Male
chemical_list: D000906:Antibodies; D000936:Antigen-Antibody Complex; D002511:Cephalosporins; D007518:Isoantibodies; D015296:Ceftizoxime