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Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within...
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Related Experiment Video

Updated: May 4, 2026

Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
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Screening for methicillin-resistant Staphylococcus aureus: a comparative effectiveness review.

Susan B Glick1, David J Samson2, Elbert S Huang1

  • 1Section of General Internal Medicine, Department of Medicine, University of Chicago, Chicago, IL.

American Journal of Infection Control
|December 24, 2013
PubMed
Summary

Universal screening for methicillin-resistant Staphylococcus aureus (MRSA) in hospitals shows low evidence of reducing infections. More research is needed to determine the effectiveness and consequences of various MRSA screening strategies.

Keywords:
MRSASurveillance

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Area of Science:

  • Infectious Diseases
  • Public Health
  • Health Care Policy

Background:

  • Methicillin-resistant Staphylococcus aureus (MRSA) is a significant pathogen causing health care-associated infections.
  • Active surveillance for MRSA has shown promise, but its overall effectiveness requires further investigation.

Purpose of the Study:

  • To evaluate the comparative effectiveness of MRSA screening strategies versus no screening or targeted screening.
  • To assess MRSA acquisition, infection, morbidity, mortality, screening harms, and resource utilization.

Main Methods:

  • Literature search for studies comparing MRSA screening strategies.
  • Included one randomized controlled trial and 47 quasi-experimental studies.
  • Strength of Evidence (SOE) assessed using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) system.

Main Results:

  • Two quasi-experimental studies indicated reduced health care-associated MRSA infections with universal MRSA carriage screening compared to no screening (low SOE).
  • Insufficient evidence was found for other screening strategies regarding comparative effectiveness.
  • Limited evidence exists on the harms and resource utilization of MRSA screening.

Conclusions:

  • Universal MRSA screening in hospitals has low SOE for decreasing MRSA infections.
  • Insufficient evidence currently exists to determine the consequences of universal screening or the effectiveness of alternative screening strategies.