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. 1998 Jan;62(1):75-9.

Production of virulence-related proteins by Canadian strains of Streptococcus suis capsular type 2

M Gottschalk  1 , A Lebrun, H Wisselink, J D Dubreuil, H Smith, U Vecht
Affiliations

Production of virulence-related proteins by Canadian strains of Streptococcus suis capsular type 2

M Gottschalk et al. Can J Vet Res. 1998 Jan.

Abstract

The production of muramidase-released protein (MRP), extracellular protein factor (EF) and hemolysin (suilysin) by 101 Canadian field strains of Streptococcus suis capsular type 2 is described. Most strains (72%) isolated from diseased pigs were MRP-EF- and only 1 strain was MRP+EF+. This strain was also the only 1 to produce the hemolysin. Thirteen strains (15%) were MRP+ EF- and only 3 strains were MRP* EF-. All the strains isolated from clinically healthy pigs as well as a bovine and 2 human isolates had a MRP-EF- phenotype. In addition, 7 strains (8%) had a MRPS phenotype, which had so far been described for S. suis capsular type 1. In conclusion, most Canadian field isolates of S. suis capsular type 2 tested in this study do not produce the virulence-related proteins described so far for this bacterial pathogen.

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