Search

ABO Blood Group System

This Medical Laboratory Science lesson in Blood Bank supports laboratory science learning and laboratory interpretation for medical laboratory students and professionals.

ABO antigens A, B, and H; naturally occurring anti-A and anti-B; Landsteiner’s law; and why ABO mismatch is the highest-risk routine compatibility failure.

Foundational32 min read15 sectionsBlood Bank
Section 1 of 150%

Learning Objectives

Getting started

Section 1 of 15

Learning Objectives

Learning Objectives

Section: Learning Objectives

Each objective below describes a competency you will apply at the immunohematology bench, interpretation first, memorization second.

  • Map ABO phenotypes (A, B, AB, O) to expected red-cell antigens and plasma antibodies using Landsteiner’s law
  • Explain the roles of A, B, and H antigens in forward typing logic and why reverse typing must correlate before a group is released
  • State why ABO-incompatible RBC transfusion is clinically catastrophic and how the laboratory prevents issue through forward/reverse concordance and SOP-guided discrepancy workup

Section 1 of 15