Production of virulence-related proteins by Canadian strains of Streptococcus suis capsular type 2.
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.
Gottschalk
M
M
Département de pathologie et microbiologie, Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec.
Lebrun
A
A
Wisselink
H
H
Dubreuil
J D
JD
Smith
H
H
Vecht
U
U
D000818:Animals; D001426:Bacterial Proteins / Q000096:biosynthesis*; D002170:Canada; D002417:Cattle / Q000382:microbiology*; D006460:Hemolysin Proteins / Q000096:biosynthesis*; D006801:Humans; D009930:Organic Chemicals; D010641:Phenotype; D012703:Serotyping; D017011:Streptococcus suis / Q000145:classification* / Q000302:isolation & purification / Q000472:pathogenicity*; D013552:Swine / Q000382:microbiology*; D014774:Virulence
D001426:Bacterial Proteins; C082316:Epf protein, Streptococcus suis; D006460:Hemolysin Proteins; D009930:Organic Chemicals; C104760:suilysin