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The Journal of Medical Microbiology, Vol 22, Issue 2 101-105, Copyright © 1986 by Society for General Microbiology

JOURNAL ARTICLE

A search for new group-B streptococcal serotypes

J. Motlova, M. Wagner and J. Jelinkova

New serotypes were sought among 165 clinical isolates of group-B streptococci that were untypable by antisera for the conventional types Ia, Ib, II and III. The strains were tested for sialic acid, an integral component of the group-B streptococcal type-polysaccharides; trypsin-treated bacteria were tested by slide-agglutination with the sialic-acid-specific lectin from the snail Cepaea hortensis. Sialic acid was detected in 96 of the strains; in 95 of these, new type antigens were identified serologically (type IV, 52; provisional type V, 34; candidate type NT6, seven; provisional type V and candidate type NT6, one; candidate type 7271, one); the remaining strain was found to possess a small amount of Ia antigen. Sialic acid was not detected in 69 strains, and none of these possessed a polysaccharide type-antigen. Chemical measurement of the sialic-acid content of cultures by Aminoff's method gave results in conformity with the lectin-agglutination test and the presence of polysaccharide type-antigens.


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I. H. Ekin and K. Gurturk
Characterization of bovine and human group B streptococci isolated in Turkey.
J. Med. Microbiol., May 1, 2006; 55(Pt 5): 517 - 521.
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