Properties of a new complement-dependent bactericidal factor specific for Ra chemotype salmonella in sera of conventional and germ-free mice.


A complement-dependent bactericidal factor, Ra-reactive factor, that acts specifically on Ra chemotype strains of Salmonella was found in sera of eighteen strains of nonimmune mice, including a thymusless strain. The specificity of binding of this factor to the cells of Ra chemotype bacteria was evidenced by absorption studies. The factor was inactivated by… (More)


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