You mix a few drops of a patient's blood with ABO and Rh typing serums (antibodies against A, B, & Rh erythrocyte antigens), with these results: Anti-A no agglutination; Anti-B no agglutination; Anti-Rh agglutination. What is the patient's ABO blood group and Rh type? O positive AB negative A negative O negative AB positive
ABO blood group and Rh-factor
The ABO blood group is determined by the presence or absence of two antigens (A and B) on the surface of red blood cells. These antigens are determined by the genetic makeup of an individual and are inherited from their parents.
There are four main ABO blood groups: A, B, AB, and O.
Blood group A has A antigens on the surface of red blood cells, blood group B has B antigens, blood group AB has both A and B antigens, and blood group O has neither A nor B antigens.
The Rh factor is another blood group system, which is determined by the presence or absence of a specific antigen, called the Rh antigen or D antigen, on the surface of red blood cells. Individuals who have the Rh antigen are said to be Rh positive (Rh+), while those who do not have the Rh antigen are Rh negative (Rh-).
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