Table 1.

Comparison of hemagglutination inhibition using different concentrations of cells displaying Gp.Mur.

	RBC Agglutination (Preadsorption)		RBC Agglutination: Conventional Tube Method							RBC Agglutination: Densitometric Method
			(Postadsorption)							(Postadsorption)
Adsorbing Cells			WT-td	Gp.Mur-6C						WT-td	Gp.Mur-6C
Cell Conc.			1.0 × 105	1.0 × 105		5.0 × 104		2.5 × 104		1.0 × 105	1.0 × 105		5.0 × 104		2.5 × 104
Sample	IS a	AHG b	Grade	Grade	% inh c	Grade	% inh	Grade	% inh	Int d	Int	% inh	Int	% inh	Int	% inh
A	3+	1+	3+	0	100	1+	67	2+	33	735	0	100	19	97	486	34
B	4+	3+	4+	1+	75	2+	50	2+	50	1858	0	100	163	91	678	64
C	4+	2+	3+	0	100	0	100	1+	67	442	1	99	82	81	359	19
D	3+	1+	4+	1+	75	2+	50	4+	0	1584	124	92	796	50	1444	9
E	4+	3+	4+	1+	75	3+	25	4+	0	1628	583	64	844	48	1312	19
F	4+	1+	3+	1+	67	2+	33	3+	0	1919	460	76	1245	35	1788	7
G	3+	3+	4+	1+	75	2+	50	3+	25	1232	79	94	660	46	1155	6
H	4+	1+	4+	0	100	1+	75	2+	50	2953	0	100	264	91	747	75
I	4+	1+	4+	1+	75	2+	50	3+	25	1538	361	77	730	53	1434	7
J	2+	3+	4+	1+	75	2+	50	3+	25	1228	198	84	687	44	812	34
Average					82		55		28			89		64		27

^a Immediate spin phase; ^b antihuman globulin phase; ^c % inhibition; ^d signal intensity.