On the antigenicity of diphtheria toxoid. IV. The usefulness of the quantitative Schick test as the response in the assay of immunizing potency.
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Biological Assay↗
Biomedical subjects
Publications and source records attributed to H KONDO.
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Three diphtheria toxoid preparations, fractionated at various concentrations of ammonium sulfate, having various grades of purity, and showing striking differences in immunizing potency when compared at the same Lf dose, were examined for similarity of the effective constituents in the fractions. No evidence of deviations from parallelism of the dose-response regression lines was observed; thus the statistical criteria for qualitative similarity were satisfactory met.
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