Who discovered the AB blood group?

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Detailed Solution

The AB blood group was discovered in 1902 by two of Karl Landsteiner’s students, Adriano Decastello and Alfred Sturli, following Landsteiner’s earlier identification of the A, B, and O blood groups in 1900. This finding completed the ABO blood group system by revealing a type that carries both A and B antigens on red blood cells.

1900: Karl Landsteiner identified the A, B, and O blood groups.
1902: Landsteiner’s students, Adriano Decastello and Alfred Sturli, discovered the AB blood group, finalizing the ABO classification.

Significance

The discovery of the AB blood group demonstrated that an individual could have both A and B antigens on their red blood cells and therefore lack A and B antibodies in their plasma, making this group crucial for understanding blood compatibility.

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