Image Based Question – 73143

Identify the blood grouping process done here.

Slide given with:  AB no clumps, Clumping in O & No clumps in control.  Which group does this signify?

A. A-ve

B. B+ve

C. O+ve

D. Rh group

Correct Answer » D Explanation

Ans:D. Rh group.

• D antigen –

  • Most important blood group antigen in routine blood banking.

  • Antibodies of Rh system do not occur naturally in serum.

  • Mostly as a result of antigen exposure during pregnancy or through transfusion.

• Presence or absence of D antigen determined by testing RBC’s with Anti-D.

  • Agglutination indicates D positive test cells.

  • No agglutination indicates D negative test cells.

• “Weak D” – Used to describe D antigen forms that are un-agglutinated directly by anti-D reagents