Environmental Investigation and Genetic Analysis of Nosocomial Transmission of Methicillin-Resistant Staphylococcus aureus

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  • NOGUCHI Keiko
    Department of Pharmacy, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital Infection Control Team, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital
  • MITSUDA Masaki
    Department of Pharmacy, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital Infection Control Team, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital
  • YAMASAKI Katsutoshi
    Department of Clinical Laboratory, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital Infection Control Team, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital
  • OHTA Takeshi
    Department of Nursing, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital Infection Control Team, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital
  • OHTA Kaori
    Department of Nursing, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital Infection Control Team, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital
  • YAMAMOTO Motoki
    Department of Surgery, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital Infection Control Team, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital
  • TATSUTA Hitomi
    Department of Respiratory Medicine, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital Infection Control Team, Independent Administrative Institution Japan Labour Health and Welfare Organization Wakayama Rousai Hospital

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  • MRSAの院内伝播制御における環境調査と遺伝子学的解析の有用性
  • MRSA ノ インナイ デンパ セイギョ ニ オケル カンキョウ チョウサ ト イデンシガクテキ カイセキ ノ ユウヨウセイ

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Abstract

  Three methicillin-resistant Staphylococcus aureus (MRSA) clinical isolates were identified in one ward of our hospital from February to March 2014. These 3 MRSA strains were isolated 48 hours or more after hospital admission. Antibiogram and PCR-based open-reading frames typing methods revealed that 4 MRSA strains which contained 1 strain isolated from a long-term inpatient originated from one clone. We carried out an environmental investigation of the ward to reveal the source and route of the nosocomial transmission of MRSA. Four MRSA strains isolated from the environment of this ward and were from the same clone, indicating that dissemination within the environment of this ward was responsible for the spread of MRSA. This nosocomial transmission was terminated by the intervention of the infection control team including environment improvement. This study shows that identification of the source and route of the spread is important to prevent nosocomial transmission.<br>

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