Description of 14 new capsular types of Streptococcus suis

M. Gottschalk, Robert Higgins, M. Jacques, K. R. Mittal, J. Henrichsen

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163 Scopus citations


Fourteen new capsular types of Streptococcus suis (types 9 to 22) are described. All reference strains are morphologically and biochemically similar to types previously described. Reference strain types 9 to 13, 15, 16, and 22 were isolated from disease pigs, whereas types 17 to 19 and 21 came from clinically healthy pigs; type 14 was isolated from a human case of meningitis, and type 20 was isolated from a diseased calf. The group T streptococcus of de Moor has been included in the typing system as type 15. Two-way cross-reactions between types 6 and 16 and a one-way cross-reaction between types 2 and 22 have been demonstrated. In addition, several cross-reactions probably not due to capsular material were detected among different types by using the coagglutination test. This test should not be used alone; weak or multiple positive reactions must be confirmed by the capsular reaction test or the capillary precipitation test.

Original languageEnglish (US)
Pages (from-to)2633-2636
Number of pages4
JournalJournal of Clinical Microbiology
Issue number12
StatePublished - Dec 9 1989
Externally publishedYes

ASJC Scopus subject areas

  • Microbiology
  • Microbiology (medical)


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