Microbiological Characterization of Clinical Isolates of <I>Staphylococcus epidermidis</I>

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  • TOBITA Masako
    Central Clinical Laboratory, Akita University Hospital
  • NAKAGOMI Osamu
    Department of Laboratory Medicine, Akita University School of Medicine
  • UESUGI Shiro
    Department of Laboratory Medicine, Akita University School of Medicine

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Other Title
  • 臨床材料から分離される<I>Staphylococcus epidermidis</I>の細菌学的研究
  • 臨床材料から分離されるStaphylococcus epidermidisの細菌学的研究
  • リンショウ ザイリョウ カラ ブンリサレル Staphylococcus ep
  • Microbiological Characterization of Clinical Isolates of Staphylococcus epidermidis

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Abstract

As a result of recent development in medical practice including use of new antimicrobial agents, coagulase-negative Staphylococci (CNS) that were once considered nonpathogenic contaminants have captured attention as causes of disease. The 43 clinical isolates of Staphylococcus epidermidis sensu stricto and 7 isolates of S. epidermidis from the medical staffs were characterized with regard to (1) their biochemical profiles, (2) slime productivity, (3)β-lactamase productivity and (4) plasmid patterns. Most of the isolates have an identical biochemical profile code. The slime production was observed in the 9 strains isolated from pleural effusions or the tubes used for pleural drainage. These strains had a similar antimicrobial susceptibility profile that are commonly seen in multi-resistant strains of methicillin-resistant Staphylococcus aureus (MRSA). In addition, most of these strains produced β-lactamase. For the plasmid profiling, we selected 12 isolates that possessed 5 distinct antimicrobial susceptibility profiles. Upon agarose gel electrophoresis, 8 isolates were shown to possess a 1.9 kb plasmid. These 8 isolates had resistance against tobramycin (TOB) and erythromcin (EM). Emergence of S. epidermidis as causes of disease will increasingly necessitate the detailed microbiological characterization of the clinical isolates.

Journal

  • Kansenshogaku Zasshi

    Kansenshogaku Zasshi 65 (5), 540-545, 1991

    The Japanese Association for Infectious Diseases

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