ABO Antibodies

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The page below is a sample from the LabCE course Introduction to the ABO Blood Group System. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Introduction to the ABO Blood Group System (online CE course)
ABO Antibodies

In the ABO system, when the antigen is missing from the cells, the corresponding antibody will predictably be found in the serum and must be found before determining the ABO type. There are few exceptions to this rule, and any exception must be explained before the actual ABO blood type can be determined.