Serotyping and evaluation of the virulence in mice of Streptococcus suis strains isolated from diseased pigs

• Published in: Revista do Instituto de Medicina Tropical de São Paulo Vol. 47; no. 2; pp. 113 - 115
• Main Authors: Costa, Adrienny T R, Lobato, Francisco C F, Abreu, Vera L V, Assis, Ronnie A, Reis, Ronaldo, Uzal, Francisco A
• Format: Journal Article
• Language: English
• Published: Brazil Instituto de Medicina Tropical de Sao Paulo 01-03-2005; Instituto de Medicina Tropical
• Subjects: Animals; Brazil; Cross Reactions; Mice; Serotyping; Streptococcal Infections - microbiology; Streptococcal Infections - veterinary; Streptococcus suis - classification; Streptococcus suis - isolation & purification; Streptococcus suis - pathogenicity; Swine; Swine Diseases - microbiology; TROPICAL MEDICINE; Brazil; Diseased pigs; Virulence in mice; Serotyping; Streptococcus suis
• ISSN: 0036-4665; 1678-9946; 0036-4665; 1678-9946
• DOI: 10.1590/S0036-46652005000200012

A total of 110 strains of Streptococcus suis, isolated from diseased pigs in Brazil were serotyped and analyzed for virulence. Serotyping of the strains resulted in the following classification: 42 strains of serotype 2 (38.2%), 10 strains of serotype 14 (9.1%), seven strains of serotype 9 (6.4%), three strains each of serotype 7 and 11 (2.7%), two strains each of serotype 1 and 8 (1.8%) and one strain each of serotypes 1/2, 3, 5, 6 and 10 (0.9%). Cross reactions among serotypes 1, 14 and 7 were observed in 21 strains (19.1%). Only 41.9% of the strains were lethal for mice using the pathogenicity test.