What Does Blood Type ABO Mean?
Blood type ABO is the named used for human blood type testing. The body's red blood cells carry antigens that are used for classification of blood type. The blood type ABO test identifies which if any of these antigens is present in a person's blood. If a person has the A antigen, he or she is classified as having type A blood. Individuals with the B antigen are identified as type B, while having both antigens results in a classification of type AB. Individuals with type O blood do not have either the A or B antigen. A separate test, blood type Rh is used to identify the presence or absence of a separate antibody not used for classification.
The four blood types are not all compatible. The antibodies of one blood type will attack antigens of another type. For example, type A antibodies will attack type B antigens and type O antibodies will attack both A and B if these antigens are introduced into the blood stream. But, because type O doesn't have either A or B antigens, type A, type B, and type AB individuals can accept type O transfusions. Thus, before an individual may receive a blood transfusion, his or her blood type must be identified through blood type ABO testing.
The blood type ABO test may also be called an ABO test.