Blood typing

Blood typing – how do you find out to which blood group someone belongs?




A person with A+ blood receives B+ blood. The B antibodies (yellow) in the A+ blood attack the foreign red blood cells by binding to them. The B antibodies in the A+ blood bind the antigens in the B+ blood and agglutination occurs. This is dangerous because the agglutinated red blood cells break after a while and their contents leak out and become toxic.


1.You mix the blood with three different reagents including either of the three different antibodies, A, B or Rh antibodies.
2.Then you take a look at what has happened. In which mixtures has agglutination occurred? The agglutination indicates that the blood has reacted with a certain antibody and therefore is not compatible with blood containing that kind of antibody. If the blood does not agglutinate, it indicates that the blood does not have the antigens binding the special antibody in the reagent.3.If you know which antigens are in the person's blood, it's easy to figure out which blood group he or she belongs to!