Molecular Features of β-Hemolytic Streptococci Isolated from Blood in Adult Invasive Infection and the Clinical Background Factors

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  • ASAMI Ryoko
    Divisions of Clinical Laboratory, Tama-Hokubu Medical Center, Tokyo Metropolitan Health and Medical Treatment Corporation
  • OKADA Keisuke
    Laboratories of Molecular Epidemiology for Infectious Agents, Graduate School of Infection Control Sciences, Kitasato University
  • CHIBA Naoko
    Laboratories of Molecular Epidemiology for Infectious Agents, Graduate School of Infection Control Sciences, Kitasato University
  • UBUKATA Kimiko
    Laboratories of Molecular Epidemiology for Infectious Agents, Graduate School of Infection Control Sciences, Kitasato University
  • TAKAHASHI Takashi
    Internal Medicine, Tama-Hokubu Medical Center, Tokyo Metropolitan Health and Medi cal Treatment Corporation Infectious Diseases, Graduate School of Infection Control Sciences, Kitasato University

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Other Title
  • 成人の血液培養由来β 溶血性レンサ球菌の疫学的性状と発症例における背景因子の特徴
  • セイジン ノ ケツエキ バイヨウ ユライ ベータ ヨウケツセイ レンサ キュウキン ノ エキガクテキ セイジョウ ト ハッショウレイ ニ オケル ハイケイ インシ ノ トクチョウ

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Abstract

We studied the relationship between features of β-hemolytic streptococci (n＝45) isolated from blood in adult invasive infection and the clinical background factors observed from January 2001 through August at a hospital for the elderly. The meanage of subjects having invasive streptococcal infection with 22 invasive Streptococcus dysgalactiae subspecies equisimilis (SDSE) strains, 2 S. pyogenes isolates, and 21 S. agalactiae (GBS) was 80 years, and 85.7％ and 86.4％ had underly diseases in the GBS and SDSE infections. SDSE-infected were mainly emergency woman outpatients and GBS infected were mainly man inpatients. The clinical syndrome involved pneumonia, urosepsis, and cellulitis. GBS mortality was 14.3％and SDSE mortality 27.3％. Compared to survivors, nonsurvivors had more thrombocytopenia and marked serum C-reactive protein elevation when blood culture were performed. No difference was seen in white blood cell count between bath groups. Our observations suggest that blood culture should be obtained before antimicrobials administration in elderly individuals with underlying illness who are seen at the emergency department and have laboratory blood data suggestive of infectious disease.

Journal

  • Kansenshogaku Zasshi

    Kansenshogaku Zasshi 84 (3), 285-291, 2010

    The Japanese Association for Infectious Diseases

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