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Tareq Abadl: Kell System and Anti-K Alloimmunization
Tareq Abadl/LinkedIn
Aug 9, 2026, 15:33

Tareq Abadl: Kell System and Anti-K Alloimmunization

Tareq Abadl, Medical Lab Specialist, shared a post on LinkedIn:

”Kell System and Anti-K Aloimunization

Why Is Anti-K So Important in Pregnancy?

What is anti-K

Anti-K is an IgG alloantibody directed against the Kell (K) antigen.

It can cross the placenta and cause HDFN.

How does alloimminization occur?

A K-negative mother may develop Anti-K after exposure to K-positive RBCs through:

  • Previous pregnancy
  • Blood transfusion

Why is anti-K dangerous?

Anti-K can cause fetal anemia through TWO mechanisms:

RBC Destruction

Destruction of K-positive fetal RBCs.

Erythropoiesis suppression

Anti-K can target erythroid precursor cells, reducing fetal RBC production.

Severe fetal anemia can occur.

Laboratory takeaway

When Anti-K is detected during pregnancy:

  • Perform antibody identification
  • Consider it clinically significant
  • Provide K-negative compatible RBCs when transfusion is required
  • Antibody titer alone should not be used to predict severity

Remember

Anti-K causes red blood cell destruction and suppression of red blood cell production.

A clinically significant antibody you should never overlook.”

Tareq Abadl: Kell System and Anti-K Alloimmunization

Other posts featuring Tareq Abadl on Hemostasis Today.

Anti-K Alloimmunization Health Hematology Hemostasis Hemostasis News Hemostasis Today Kell System Medicine Pregnancy Tareq Abadl
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