Antiserum A and Type O Blood: Agglutination Explained

Answer: Yes

Type O red cells carry both A and B antigens? Actually, type O cells have no A or B antigens, but the plasma contains anti‑A and anti‑B antibodies. Antiserum A contains anti‑A antibodies. When mixed with type O cells, no agglutination occurs because there are no A antigens on the cells to bind the antibodies.

Correction to Original Statement

The original answer incorrectly stated agglutination would occur. The correct reaction: No clumping with antiserum A on type O cells. Agglutination happens when antiserum A meets type A or AB cells.