QUANTITATIVE DETERMINATION, IN TYPE-SPECIFIC ANTISERA TO HEMOPHILUS INFLUENZAE, OF THE ANTIBODY THAT CROSS-REACTS WITH ENCAPSULATED PNEUMOCOCCI

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Abstract
Different relative amts. of antibodies that cross-react with Diplococcus pneumoniae were found in type-specific antisera produced with different strains of types b and c Hemophilus influenzae. Approx. 50% of the antibody in some antisera to type b H. influenzae could be removed by absorption with types XXIX and XVA pneumococci. Antisera were found to one strain of type a, one strain of type b and one strain of type c H. influenzae that contained 1% or less of cross-reacting antibodies.