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You may know your blood type, but do you know that on do people have 35 different blood types? They include as well-known systems like groups I, II, III, IV and the system Rh factor, and very unusual.
Advances in research technology over the last few years allowed to identify three new systems of blood groups: Langereis and Junior, identified in 2012, and andVel, found a year later. All three were named after patients which they were first discovered.
For example, in Japan there are about 2500 people with Langereis is a negative blood type. And although people with such a group found around the globe, their total number is unknown. also in Japan found about 50,000 people with Junior-negative blood type. This group is less common in the rest of the world, however people with her can be found in the European gypsy community. And about 400,000 people – mainly in Europe and the USA – are believed to have Vel-negative blood type.
An important step for transfusion medicine was to determine specific antigens and antibodies of each system, since all three recognized as “clinically significant.” The reason is that they are capable cause a dangerous reaction if they are transfused to the patient, developed antibodies against positive blood groups.
The most dangerous antibodies against Vel-groups, received designation “anti-Vel”. Blood transfusion specialists know about their existence since the 1950s, when the body of “Patient Vel”, The 66-year-old woman violently rejected the blood transfused.
There is still a possibility that in the human community other, even rarer, blood groups or antigens will be found. Professor Ballyf, who, along with his colleagues identified the molecular basis of the Langereis and Junior groups, and who participated in the development of the test for the Vel-group, believes that there may be about ten such groups not yet open.
Source translation for gearmix (Cowanchee)
Japan
