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Deposition of C3b and MAC on cells of strain H44/76, its PorA(+) and PorA(−) variants, and the the PorA(+) and PorA(−) variants of the unencapsulated strain v24. Bacteria were incubated in a serum with high bactericidal activity (serum A) and a serum with no bactericidal activity (serum B).
