Interpretation of result is that patient has D-antigen.
Anti-D antigen is present on the surface of Red Blood Cells. It is known as Rhesus factor and is seen as positive or negative form for different blood types. The negative form indicates absence of D antigens. The positive form indicates presence of D antigens on surface of Red Blood Cells.
The agglutination reaction indicates reaction between antigen and antibody. The anti-D reagent is antibody. The interaction between antigen and antibody results in insoluble complex seen as small lumps. This is called agglutination reaction.
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