Evaluation Process of Subtypes of ‘A’ Blood Group Individual: A Case Report on Weak Subgroup of ‘A’
Karl Landsteiner, discovered the ABO blood group system. However, the ABO subgroups and other weaker variants create problems in blood grouping. The A1 and A2 phenotypes account for about 99% of all A or AB blood group individuals and the rest are the weaker subgroups. They are usually suspected in cases of blood group discrepancies. Meticulous serological testing with technical expertise will help to differentiate these subgroups. We describe a case of a healthy Blood donor with blood group discrepancy due to a weak subgroup of ‘A’ in the ‘A’ blood group.