TABLE 1.

Comparison of the percent PMNs phagocytosing C. neoformans in the presence of 2E9 and human myeloma IgM^a

Serum	% PMNs fluorescing with:		Pb
	2E9	Myeloma IgM
Unheated rabbit serum	34.26 ± 3.43	10.52 ± 2.78	0.00032
Heated rabbit serum	6.89 ± 3.43	7.04 ± 1.76	0.85
Pc	0.0004	0.1151

^aThe E/T ratio for these experiments was 1:10 (PMNs to yeast cells). Each of the experiments for which results are reported was performed five times. P values were determined by the Mann-Whitney U test. 

^bFor 2E9 versus the myeloma antibody. 

^cFor heated versus unheated rabbit serum.