Recently, the Laboratory Department of Changsha Fourth Hospital discovered a case of "dinosaur blood". This precious blood type, which is only one in ten thousand in the Chinese population, has been found less than 100 cases so far. It is ranked among the top ten rare blood types in the world - "Mumbai-like blood type" . This blood type was named after it was discovered in Mumbai- in 1952. What exactly is the Mumbai blood in
? Why is it so rare?
comparison, many people have heard of it, Rh negative blood , , which is known as " panda blood , and people with Mumbai-like blood type are rare. Unlike ordinary blood, Mumbai-type blood type does not have A, B, and H antigen in red blood cell . In addition to anti-A and anti-B antibodies, there are also anti-H antibodies in the serum, and A or B antigens can be found in saliva. tml3 antigen is the main basis for distinguishing blood types . We collectively call blood samples containing A antigen type A blood. Similarly, blood containing B antigen and having both A and B antigens are B blood and AB blood. H antigen is the prerequisite for the synthesis of the other two antigens in the human body, so O blood is also called universal blood .
For a long time, the medical community did not divide the blood type of Mumbai blood type , but regarded it as a type of O type . Even in Mumbai, India, only one in 10,000 people have this blood type.
Mumbai blood type people cannot accept other heterogeneous blood because they contain H antibodies. If there is an error in the distinction between blood types, it is very easy to have blood transfusion accidents. , It is precisely because the Mumbai-like blood type discovered this time has attracted so much attention.
Because the blood type is too rare, there was almost a misunderstanding. Blood type is one of many genetic characteristics, but this extremely regular genetic characteristic has been a special case in the obstetrics and gynecology department of a hospital in Hainan. The blood type of parents with both type O gave birth to offspring of B blood . As soon as the child's blood type came out, doubts were already spread throughout the ward. Facing the husband's slightly suspicious eyes, the wife felt aggrieved and had to ask the hospital for help. After the genetic sequencing results came out, the husband was obviously relieved, but the doubts about the matter could not be solved. Why did the children born by their biological parents do not meet the blood type rules? Later, after screening and antigen testing, it was found that the mother of the child of was actually Mumbai-like blood type . This is lower than the chance of winning the lottery. The population of China's 1.4 billion is less than 100 cases.
The secret of blood type was not scientifically explained until modern medicine. In ancient times, blood type has always been the most mysterious existence. We can often see the scene of drops of blood recognizing in costume dramas. When the identity of the characters in the drama is suspected, the camera will immediately turn to the bowl containing special liquids. The blood will not dissipate in the bowl, but will sink to the bottom of the bowl. When the blood of the two people merges, the expressions of the characters' expressions will immediately become vivid, or a long sigh or tears will be repeated , and a costume Ukiyo-e will begin.
This method that sounds mysterious but seems to be somewhat reasonable is in the eyes of modern medicine. The more mysterious one is "Dripping bones to recognize relatives" . This method is not only circulated among the people, but it is recorded in the first forensic book in my country's history in " Huawen Jilu " , but it still has not been scientifically verified.
What is the genetic code between blood types?
According to the current research results, our human blood types are generally two types, one is the common blood type and the other is the rare blood type. The four well-known common blood types are: A, B type , AB type and O type.
When the blood type genes of both parents bind in bisexual cells, they are paired in the nuclear chromosome, and the genetic characteristics of the blood type will be passed to offspring. Parents can easily infer the blood type of their children based on their own blood type.
- Both parties are parents of type A blood or a combination of type A and type O. The blood type of children born can only be A or type O.
- When the blood types of both parties are of type B, the children may be of type B or type O.
- When both blood types are type A and type B, the blood type of children may be randomly distributed among the four blood types.
- A combination of type A and type AB, the children they want may be the other three types of except type O.
In addition to these four common blood types, other blood types are collectively called rare blood type systems. Just like the type Mumbai blood type mentioned in this article, their distribution in the population is extremely rare, with the proportion in the Chinese population being less than one in a million. This is not the end. The most rare A3 sub-heath type , there is only one person in so far. Although the owner of rare blood type is special, it is very dangerous. It is because they are too unique that when their lives are endangered and a large amount of blood transfusion is needed, it is difficult to enjoy the medical resources of ordinary people. Scarcated blood type will become the biggest obstacle to rescue. Although many years ago, the International Health Organization has established the Rare Blood Type Committee to collect and study Rare Blood Type to establish a rare blood type blood bank for emergencies, but long-term blood turnover time is still a problem facing the rescue moment.
So every newly discovered rare blood type owner can say that has opened a door of rebirth for other companions, and is so vivid among the unique blood type people.
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