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We reviewed HLA antibody testing results using an enzyme-linked immunosorbent assay (ELISA) for all male blood donors at our institution during a 3.5-month period to look for HLA immunization. Confirmatory testing of 33 blood samples positive for HLA class I and/or II antibodies was performed using the fluorescent bead method. A retrospective review of recipients of packed RBCs and platelets processed from these 33 HLA-immunized male donors were conducted to identify transfusion-related acute lung injury and cognate antigens. The agreement rates between the methods for HLA class I and II antibodies were 21% (7/33) and 6% (2/33), respectively. We noted HLA antibodies in the male donors corresponding to cognate antigens in 2 recipients of packed RBCs and in 3 recipients of platelets. Of 8 donors positive for HLA antibodies, 5 did not have a history of blood transfusion. We conclude that ELISA was too sensitive and had a high false-positive rate for the detection of HLA class II antibodies.

american journal of clinical pathology

Results of HLA Antibody Testing Using ELISA vs the Fluorescent Bead Method and Retrospective Review of Data for Recipients of Packed RBCs and Platelets From Male HLA-Immunized Donors