Posts Tagged ‘Antigens’
WHAT IS THE BLOOD GROUP?
Blood type is each of the various types has been classified in the blood of individuals with regard to the compatibility of the red cells and serum of another individual donating blood with red cells and serum of another individual who receives it. The determination of these groups, which initially limited to the section of donors and recipients for blood transfusion been extended to include the determination of paternity and identification in criminology.
These groups are four, according to the classification made by Landsteiner, universal classification and are known today: O, A, B, AB. They are characterized by different combinations of two existing agglutinates in red blood cells and two agglutinins contained in the serum. Read the rest of this entry »
Antigens A and B are the best known, but not the only ones that exist in human blood is another, called Rh factor, which is found in red blood cells more than 85% of the population worldwide. This component is important when a woman with Rh negative (no Rh antigen) conceives a child of a man who is Rh positive (Rh antigen in their blood), because this fact may pose a hazard to the fetus or the newborn. How the mother may have acquired these antibodies destructive? It may have been by a Rh-positive blood transfusion or a previous pregnancy if the fetus’s blood mixed with it at the time of delivery or abortion. The first pregnancy of this kind involves little risk because the formation of antibodies takes time, but once the mother’s blood has been sensitized, Rh incompatibility can be a serious problem in subsequent pregnancies. To avoid this danger, physicians administered to Rh negative mothers after each pregnancy, a desensitizing recently discovered, so that your blood will not form antibodies that destroy the Rh positive red blood cells. Another modern technique is to fully replace the newborns blood through a transfusion. Read the rest of this entry »