FIG. 7.

Bactericidal activities of four LOS-specific IgG preparations (35E, 1291, 6940, and 8532V; 100 μg/ml) against group B N. meningitidis strains 7946 (L3,7), 7993 (L2,4), and 7994 (L1,8). Survival was expressed as the percentage of the organisms present at time zero that survived for 60 min. C, complement alone; In C, heat-inactivated complement alone. The amount of NHS used as a complement source was 25% for strain 7946, 15% for strain 7993, and 20% for strain 7994. The error bars indicate standard deviations.