Detection of a weaker subgroup of A in ABO blood group system

Abstract excerpt

Testing to detect ABO incompatibility between a donor and potential transfusion recipient is the foundation on which all other pretransfusion testing is based. Sometimes, weak agglutination reactions may be obtained with reagent antibodies due to weak expression of A and B antigens on red blood cell (RBC) surface which may cause a discrepancy in blood group typing. Here, we report a patient showing discrepancy...

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