FREQUENCY OF ABO AND RHESUS (D) BLOOD GROUPS IN DAKSHINA KANNADA DISTRICT OF KARNATAKA - A STUDY FROM RURAL TERTIARY CARE TEACHING HOSPITAL IN SOUTH INDIA
Background: ABO and Rh blood groups are most important blood groups in human beings. The frequency of four main blood group systems varies in population throughout the world and even in different parts of country. Objective if this study was to identify distribution of ABO and Rh blood group system.
Materials and methods: The study was conducted in rural tertiary care hospital from January 2008 to December 2012. Data were collected from Blood Bank grouping records. All blood samples processed during period of observation were included in study.
Results: During the period of observation total 43,103 numbers of blood groups were performed. Patient's samples were 28,305 and donor's samples were 14,798. The frequency of blood group O in our population was 42.0% (40.1% O Rh positive and 1.8% O Rh negative). The frequency of blood group B in our population was 27.3% (25.6% B Rh positive and 1.62% B Rh negative) followed by blood group A was 25.8% (24.3% A Rh positive and 1.4% A Rh negative) and blood group AB was 4.8% (4.4% AB Rh positive and 1.4% AB Rh negative) and a two Bombay blood group donors (0.0046%). Rh positive were 94.64% and Rh negative were 5.35%.
Discussion: O positive blood group is significantly high in our population. Every transfusion centre should have a record of frequency of blood group system in their population. It helps in inventory management. Knowledge of blood group distribution is important for clinical studies, for reliable geographical information and for forensic studies in the population.
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