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Home Science & Tech

Bombay blood group

April 15, 2020
in Science & Tech
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Recently there has been a spike in demand for a rare blood type called Bombay blood group.

About the Bombay blood Group:

  • Blood types are divided into four common blood groups under ABO’s blood group scheme, i.e. A, B, O, AB.
  • Each red blood cell has a surface antigen that helps to determine which group it belongs to.
  • Depending upon a person’s ABO blood type, the H antigen is converted into either the A antigen, B antigen, or both.
  • If a person has group O blood, the H antigen remains unmodified.
  • Therefore, the H antigen is present more in blood type O and less in blood type AB.
  • In the Bombay blood group, individuals have inherited two recessive alleles of the H gene (i.e. their genotype is hh).
  • This means that there is no antigen H in the RBC of the hh blood group.
  • Dr Y M Bhendefirst discovered the rare Bombay blood group in 1952 in Mumbai (then in Bombay).
  • The occurrence of the hh blood type is one in four million worldwide.
  • Nevertheless, because of inbreeding and close marriage between groups, the blood type is more prevalent in South Asia than anywhere else.
  • In India, between 7,600 and 10,000 people are born of this kind.
  • Because of the rare hh blood type, patients experience blood transfusion problems, which often lead to death.
  • Individuals with the blood group of Bombay can only transfuse blood from people with a very unusual Bombay hh phenotype.
  • This is not usually stored in blood banks, particularly because it is rare and blood shelf-life is 35-42 days.
  • Hh blood group, on the other hand, can donate their blood on ABO blood types.

 

Tags: Prelims

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