Table 1.

Serological investigation of subjects K and R with blood type B as determined by the CARD method.

		CARD method		TUBE method Plasma from types A and B		TUBE method RBCs from types A and B		Plasma (absorption test) *
								Before	After
		Anti-A antibody (MoAb)	Anti-B antibody (lectin)	Anti-A antibody	Anti-B antibody	A antigens	B antigens	Anti-A antibody	Removed Anti-A antibody
Subject K	RBCs	Negative	Positive	Positive (10)	Positive (1)	-	-	Positive	Negative
	Plasma	-	-	-	-	Negative (6)	Negative (2)	-	-
Subject R	RBCs	Negative	Positive	Positive (1)	Positive (1)	-	-	-	-
	Plasma	-	-	-	-	Negative (1)	Negative (1)	-	-
Blood type	Blood type B (only B antigen)			Blood type AB (both A and B antigens)

( ): number of cats used plasma or RBCs.

^*TUBE method.