Characterization of Group C and G Streptococcal Strains That Cause Streptococcal Toxic Shock Syndrome

• Shinnosuke Hashikawa

  Departments of Bacteriology

• Yoshitsugu Iinuma

  Department of Central Clinical Laboratory, Kyoto University Hospital, Konoe-cho, Yoshida, Sakyo-ku, Kyoto 606-8501

• Manabu Furushita

  Departments of Bacteriology

• Teruko Ohkura

  Departments of Bacteriology

• Toshi Nada

  Clinical Laboratory Medicine, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya 466-8550

• Keizo Torii

  Departments of Bacteriology

• Tadao Hasegawa

  Departments of Bacteriology

• Michio Ohta

  Departments of Bacteriology

抄録

Twelve strains (the largest number ever reported) of group C and G 1 streptococci (GCS and GGS, respectively) that caused streptococcal toxic shock syndrome (STSS) were collected and characterized. Eleven strains were identified as Streptococcus dysgalactiae subsp. equisimilis , and one strain was identified as Streptococcus equi subsp. zooepidemicus . We found that it was the first reported case of STSS caused by S. equi subsp. zooepidemicus . Cluster analysis according to the 16S rRNA gene (rDNA) sequences revealed that the S. dysgalactiae strains belonged to clusters I and II, both of which were closely related. The emm types and the restriction patterns of chromosomal DNA measured by pulsed-field gel electrophoresis were highly variable in these strains except BL2719 and N1434. The 16S rDNA sequences and other characteristics of these two strains were indistinguishable, suggesting the clonal dissemination of this particular S. dysgalactiae strain in Japan. As the involvement of superantigens in the pathogenesis of group A streptococcus-related STSS has been suggested, we tried to detect known streptococcal superantigens in GCS and GGS strains. However, only the spegg gene was detected in seven S. dysgalactiae strains, with none of the other superantigen genes being detected in any of the strains. However, the sagA gene was detected in all of the strains except Tokyo1291. In the present study no apparent factor(s) responsible for the pathogenesis of STSS was identified, although close genetic relationships of GCS and GGS strains involved in this disease were suggested.

収録刊行物

• Journal of Clinical Microbiology

  Journal of Clinical Microbiology 42 (1), 186-192, 2004-01

  American Society for Microbiology

キーワード

• Microbiology (medical)

詳細情報

• CRID: 1363951794374143488
• NII論文ID: 30021104904
• DOI: 10.1128/jcm.42.1.186-192.2004
• ISSN: 1098660X
• ISSN: 00951137
• Web Site: https://journals.asm.org/doi/pdf/10.1128/JCM.42.1.186-192.2004
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