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Updated: Jun 19, 2026

Determining the Reactivity and Titre of Serum using a Haemagglutination Assay
Published on: January 29, 2010
STUDIES ON THE PRECIPITIN REACTION : PRECIPITATING HAPTENS; SPECIES DIFFERENCES IN ANTIBODIES
1Department of Medicine, College of Physicians and Surgeons of Columbia University and the Presbyterian Hospital, New York.
Abstract:
1. Partial hydrolysis products of the specific polysaccharide of Type III pneumococcus ranging from 550 to 1,800 in formula weight can be quantitatively freed from unhydrolyzed polysaccharide. 2. The fractions yield specific precipitates with Type III antipneumococcus horse serum but fail to precipitate homologous rabbit antisera, giving rise only to specific inhibition. The aldobionic acid, the structural unit of S III, does not precipitate antisera. 3. A possible explanation and a possible application of the findings are pointed out.
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