Although O + is the most common blood type in the United States, the percentage of people with this blood type varies by ethnicity. Each type is determined by the presence or absence of certain antigens on the surface of the blood cells. The group occurs more frequently in people of African origin and many experts say, it's a mutation to prevent people in malaria-endemic regions from the disease-the Fy receptor is needed for the malaria parasite to attack. Follow Us: Blood types from the most common to rare are O +, A +, B +, O -, A -, AB +, B - and AB. The Duffy negative blood group, for example, does not have the Duffy antigen, Fy. Such characteristics also bedevil other rare blood groups. For it has antibodies which act against the antigen found in all common groups the h antigen. But the universal donor is no good when it comes to the Bombay group. This characteristic has earned o group the distinction of the "universal group" it can be transfused onto people with any blood group. But in the Bombay blood group, the antigen is not produced at all because the gene responsible for making the protein is in a recessive state.ĭuring routine grouping, this blood group is categorised as o group because it displays an important property of the o group it doesn't have antibodies against the a or b antigen. The Bombay Blood group lacks the h antigen a protein molecule present in all blood groups-the most in O type blood and the least in the ab group. A group is deemed very rare if one person in 10,000 has an antigen or lacks a certain antigen. A blood group is considered rare if one in a 1,000 has a certain antigen, or lacks a certain antigen. The negative blood group however is not among the rare 200. Only 5 per cent people lack these proteins and they are of a negative blood group. The Rh system divides blood groups on the basis of presence or absence of Rhesus proteins. Landsteiner had received the 1931 Nobel Prize in medicine for his discovery. How do I know if I am Rh negative or Rh positive As part of your. The antigens are located on the surface of red blood cells and the antibodies are found in blood plasma. Most people who have the Rh factor are Rh-positive and those who do not are Rh-negative. The abo system is called the Landsteiner classification and draws from a discovery made by Karl Landsteiner.In 1901 this Austrian physician found out that people have slight differences in their blood because of the presence or absence of certain protein molecules called antigens and antibodies. There are around 200 rare blood groups like the Bombay Blood Group, which defy slotting into the two systems used for making routine blood transfusions the abo and Rh systems. In 2005, when a woman in Hyderabad required this blood type, physicians at the Nizam's Institute of Medical Sciences found that only 11 people of the Bombay Blood Group have donated blood since 1977. But there's a major hitch Arvind is of the Bombay blood group. Preparations for the operation have been underway at a hospital in Bilaspur, Chhattisgarh-where Arvind stays-for the last few months. FIVE-YEAR-OLD Arvind Baghel has a hole in his heart and requires urgent surgery.
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