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Methicillin resistant Staphylococcus aureus.

W H Swanston1

  • 1Faculty of Medical Sciences, Eric Williams Medical Sciences Complex, Mount Hope, Trinidad.

The West Indian Medical Journal
|June 22, 1999
PubMed
Summary
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Methicillin-resistant Staphylococcus aureus (MRSA) prevalence was 4.6% at Port-of-Spain General Hospital. Most MRSA cases were hospital-acquired, emphasizing the need for antibiotic stewardship and infection control.

Area of Science:

  • Medical Microbiology
  • Infectious Diseases
  • Hospital Epidemiology

Background:

  • Methicillin-resistant Staphylococcus aureus (MRSA) poses a significant threat in healthcare settings.
  • Understanding local prevalence and risk factors is crucial for effective control strategies.

Purpose of the Study:

  • To determine the prevalence of MRSA at the General Hospital, Port-of-Spain.
  • To identify associated risk factors and clinical characteristics of MRSA infections and colonization.

Main Methods:

  • Prospective surveillance of Staphylococcus aureus isolates between June 1995 and May 1996.
  • Analysis of MRSA isolate prevalence, patient demographics, infection sites, and antibiotic exposure.
  • Antimicrobial susceptibility testing.

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Main Results:

  • MRSA prevalence was 4.6% of all S. aureus isolates; nearly all were nosocomially acquired.
  • Skin and soft tissue infections/colonization were most common (12 cases).
  • 17 of 18 MRSA patients had prior antibiotic exposure; all isolates were vancomycin-sensitive but mostly gentamicin-resistant.

Conclusions:

  • MRSA was present sporadically across wards, with temporal clusters in the ICU and surgical wards.
  • Reinforcing appropriate antibiotic use, hand hygiene, and patient isolation is essential for MRSA control.
  • Effective MRSA management requires a multi-faceted approach including strict adherence to infection prevention protocols.