Methicillin-resistant Staphylococcus aureus: source control and surveillance organization | JoVE Visualize

Area of Science:

Infectious Diseases
Hospital Epidemiology
Clinical Microbiology

Background:

Methicillin-resistant Staphylococcus aureus (MRSA) is a persistent nosocomial pathogen globally impacting patient care quality perception.
Current MRSA control strategies include education, antibiotic stewardship, active surveillance cultures (ASCs), and isolation protocols.
Despite interventions, MRSA remains endemic, with the utility of ASCs, particularly outside intensive care units (ICUs), under ongoing discussion.

Purpose of the Study:

To evaluate the current evidence regarding the effectiveness and appropriate application of active surveillance cultures (ASCs) for MRSA.
To assess the role of rapid molecular detection methods in MRSA screening within various hospital settings.
To inform guidelines on MRSA screening practices, considering laboratory preparedness and intervention monitoring.

Main Methods:

Review of published studies on MRSA screening interventions, including active surveillance cultures (ASCs) and rapid molecular detection methods.
Analysis of studies considering diverse settings (ICU, medical/surgical wards), patient populations, and infection control measures.
Consideration of laboratory workload, turnaround times, and effectiveness monitoring for screening interventions.

Main Results:

The role and extent of ASCs for MRSA detection remain a subject of debate, with international guidelines recommending their use primarily in ICUs.
Routine screening of all hospital admissions is generally not advocated, with local decisions based on non-ICU patient risk factors.
Existing evidence does not support the broad implementation of rapid molecular screening for MRSA across all hospital settings.

Conclusions:

Widespread application of rapid molecular screening for MRSA is not currently supported by available evidence.
ASC strategies should be carefully considered, potentially limited to high-risk areas like ICUs, with local risk factor assessments for other patients.
Effective MRSA control requires robust laboratory capacity, reduced screening test turnaround times, and continuous monitoring of intervention effectiveness.