The Journal of Experimental Medicine
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The Journal of Experimental Medicine, Vol 129, 1349-1365, Copyright © 1969 by The Rockefeller University Press


ARTICLE

HUMAN IMMUNITY TO THE MENINGOCOCCUS : III. PREPARATION AND IMMUNOCHEMICAL PROPERTIES OF THE GROUP A, GROUP B, AND GROUP C MENINGOCOCCAL POLYSACCHARIDES



Emil C. Gotschlich M.D.1, Teh Yung Liu Ph. D.1, and Malcolm S. Artenstein M.D.1

1 From The Department of Bacteriology, Walter Reed Army Institute of Research, Washington, D. C. 20012, and The Department of Biology, Brookhaven National Laboratories, Brookhaven, New York 11719

The group-specific polysaccharides of group A and group C meningococci have been isolated by a new procedure which employs the cationic detergent Cetavlon to precipitate these polysaccharides from the whole culture. The A and C polysaccharide prepared by this method are noteworthy because they are of high molecular weight. The main constituent of the A polysaccharide is N-acetyl, O-acetyl mannosamine phosphate; of the C polysaccharide N-acetyl, O-acetyl neuraminic acid. This purification procedure, when applied to cultures of group B organisms, yields a polysaccharide consisting primarily of N-acetyl neuraminic acid.

A passive hemagglutination test developed to measure antibodies to the polysaccharides demonstrated the specificity of these antigens. Using a hemagglutination inhibition test, these antigens were again found to be group-specific, and this test could be used for serogrouping meningococcal isolates.

Submitted on February 19, 1969


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