ABO and A subgroups in Karachi population.

An individuals blood group today, is as important as the national identity card. The obvious reason being blood transfusion in cases of emergency. Blood group data of a population is also important from a laboratory viewpoint, since it guides blood banks on number and types of blood to be stored for transfusion services. ABO group data is well established in Pakistan, however A sub-group data is not available at least for Karachi population ,since antisera for A sub-groups have recently become available in Pakistan. We report ABO and A subgroups in Karachi population from tests done on 1500 individuals. The overall ABO and Rhesus frequency is given in Table 1.