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Deposition of C3b, iC3b, and MAC on cells of strain H44/76 PorA(+) opsonized in nonbactericidal serum B supplemented with an anti-PorA chimeric antibody (means of two experiments). The concentrations of antibody used were 0.5 to 10 μg/ml. When supplemented with 1 μg of antibody/ml, the serum was able to kill more than 50% of the initial bacterial inoculum.
