A nurse is caring for a patient with a confirmed MRSA wound infection. Which nursing intervention demonstrates the most appropriate evidence-based practice for managing this patient?

Understanding MRSA and Transmission-Based Precautions
Methicillin-resistant Staphylococcus aureus (MRSA) is a multidrug-resistant pathogen that poses significant challenges in healthcare settings due to its ability to cause severe wound infections and its capacity for biofilm formation, as highlighted in recent antimicrobial research ^[2]. The primary mode of transmission for MRSA is through direct contact with an infected wound or contaminated surfaces and equipment, not through airborne or droplet routes. This distinction is critical for selecting the correct isolation precautions.

Why Contact Precautions Are the Gold Standard
For a patient with a confirmed MRSA wound infection, the Centers for Disease Control and Prevention (CDC) and the World Health Organization (WHO) Infection Prevention and Control Assessment Framework (IPCAF) recommend contact precautions as the evidence-based standard . This involves placing the patient in a private room, performing rigorous hand hygiene before and after all patient contact using an alcohol-based hand rub or soap and water, and donning a gown and gloves for any interaction that might involve contact with the patient or their immediate environment. The use of dedicated or disposable equipment (such as stethoscopes, blood pressure cuffs, and thermometers) that remains in the patient's room is another essential component, preventing the organism from being carried to other patients on shared devices.

Analyzing the Incorrect Options
Option 1 is incorrect because applying topical antibiotics alone is insufficient for treating an established MRSA infection, and a clean technique for dressing changes is not appropriate. A wound infected with a multidrug-resistant organism requires sterile technique to prevent introducing additional pathogens and to contain the existing infection. Option 2, while a necessary part of the treatment plan (administering systemic antibiotics), does not address the crucial nursing responsibility of preventing transmission to other patients and healthcare workers. Option 3 incorrectly specifies droplet precautions. Droplet precautions are reserved for pathogens transmitted via large respiratory droplets (e.g., influenza, pertussis). MRSA does not spread via this route, making this choice a fundamental misunderstanding of transmission-based precautions.

Connecting Evidence to Clinical Practice
The rationale for strict contact precautions is directly supported by infection prevention research. A cluster-randomized clinical trial investigating extended barrier precautions in intensive care settings demonstrated that interventions like gown and glove use are actively studied and refined to reduce the risk of nosocomial sepsis from drug-resistant organisms . Furthermore, a review of hospital-acquired infection prevention in ICUs emphasizes that consistent application of staff-level strategies, including adherence to hand hygiene and appropriate barrier precautions, is a cornerstone of patient safety, though implementation remains inconsistent . The WHO IPCAF framework reinforces that a facility's capacity to implement these core components—hand hygiene, personal protective equipment, and environmental cleaning—is what defines a robust infection prevention and control program . For a nurse, integrating these practices means that before entering the patient's room, you perform hand hygiene, don a gown and gloves, and ensure any equipment you carry in either stays in the room or is thoroughly disinfected with an EPA-registered hospital-grade disinfectant upon removal. This bundle of interventions directly breaks the chain of infection at its most critical link: the contaminated hands and equipment of the healthcare worker.