Adding further evidence for clinically significant anti-Le^b antibody in a voluntary blood donor

Area of Science:

• Immunohematology
• Blood group serology
• Transfusion medicine

Background:

• Routine immunohematology screening is crucial for identifying unexpected antibodies in blood donors.
• The Lewis antigen system (Le^a and Le^b) plays a role in red blood cell compatibility.
• Naturally occurring antibodies can pose transfusion risks.

Observation:

• A first-time voluntary blood donor was found to have an alloantibody in their plasma.
• The donor's blood group was confirmed as B RhD positive.
• Immunohematology workup identified the alloantibody as anti-Le^b.

Findings:

• The anti-Le^b alloantibody was characterized as both IgM and IgG.
• This dual nature of the antibody indicates clinical significance.
• The presence of anti-Le^b was confirmed using conventional tube technique and ID-Micro Column System Glass Beads card.

Implications:

• The identified anti-Le^b alloantibody can cause hemolytic transfusion reactions.
• Transfusion of fresh frozen plasma from this donor to Le^b negative patients poses a significant risk.
• This case highlights the importance of thorough antibody screening in blood donation programs.