DISTRIBUTION OF BLOOD GROUPS OF THE ABO SYSTEM IN THE MILITARY MEDICAL ACADEMY IMMUNOHEMATOLOGICAL DIAGNOSTICS

From a clinical perspective the ABO system is the most important blood group antigen system and the system Rh is one of the most complicated isoserological systems. The survey was performed in order to determine the distribution of blood groups of the ABO system and the prevalence of A1, A2 and Rh (D) antigens in patients and donors of whole blood at the Military Medical Academy (MMA). A total of 21,568 blood samples, of which 11,168 from patients and 10,400 whole blood samples from donors were studied. The distribution of blood groups according to the Rh (D) antigen and the prevalence of A1 and A2 subgroups were also determined. The prevalence of blood groups of the ABO system was as follows: – 43.2%, – 16.11%, – 32.6% and – 8.1%. The prevalence of Rh (D) antigen was 86.8%. The distribution of A1 and A2 subgroups was 90.2% and 9.8%, respectively. These results support and complement the pre-existing knowledge about the distribution of ABO blood system antigens among the Bulgarian population.