TABLE 3.

Serological characteristics of initial and passaged C. neoformans strains

Isolate	IF patterna				Endpoint (μg/ml)
	MAb 12A1		MAb 13F1		IF		Agglutination
	PBS	2H1	PBS	2H1	PBS	2H1	PBS	2H1
62066
P0	A	A	A	A	0.1	0.1	6.25	6.25
P1	A	A	A	A	0.1	<0.01	12.5	12.5
P2	A	A	A	A	0.1	0.1	12.5	12.5
P3	NDb	A	ND	A	ND	0.1	ND	0.1
24067
P0	A	A	P	P	<0.01	<0.01	1	1
P1	A	A	P	P	<0.01	<0.01	0.5	1.9
P2	A	A	P	P	<0.01	<0.01	1.9	1.9
P3	A	A	P	P	<0.01	<0.01	1.9	1
P4	A	A	P	P	<0.01	<0.01	1.9	1
P5	A	A	P	P	<0.01	<0.01	1	1
C3D
P0	A	A	A	A	<0.01	<0.01	0.5	0.5
P1	A	A	A	A	0.1	<0.01	0.25	0.25
P2	A	ND	A	ND	<0.01	ND	0.5	ND
62066c
P0	A	A	A	A	0.1	0.1	6.25	6.25
P1	A	A	A	A	1	1	3.9	7.8
C3Dc
P0	A	A	A	A	<0.01	<0.01	0.5	0.5
P1	A	A	A	A	1	0.1	0.5	1.9

^aA, annular; P, punctate. Results are for isolated passaged in mice given PBS or 2H1, as indicated. 

^bND, not done. 

^cPassaged in mice by the organ homogenate method.