Abstract
Summary
1. The immune responses that occur naturally in the course of an untreated pneumonia, studied by determining type-specific and species-specific agglutinins and by the dermal reactivity to type-specific polysaccharides, are apparently unaltered by treatment with sulfapyridine. 2. There seems to be no relation of the heterophile-antibody titer to the clinical course of pneumococcal pneumonia or its immune responses following sulfapyridine-therapy.
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