What is the most effective method to prevent hospital-acquired infection?

• A. Hand hygiene.
• B. Screening all patients for MRSA.
• C. Hand hygiene, but also environmental cleaning.
• D. Isolating every patient with infections.

Answer: (A)

Hand hygiene is the most effective way to prevent hospital-acquired infections because hands are the primary route by which microbes are transferred between patients, healthcare workers, and surfaces. When clinicians clean their hands before and after patient contact, after touching potentially contaminated surfaces, and after removing gloves, they disrupt the main transmission pathway and dramatically reduce the spread of pathogens.

Alcohol-based hand rubs are typically the quickest and most effective method for routine decontamination, provided hands aren’t visibly soiled. Soap and water are necessary when hands are dirty or after exposure to certain organisms like organisms that form spores, such as C. difficile, where mechanical washing is more thorough.

Screening all patients for MRSA can help identify carriers and guide precautions, but it doesn’t prevent transmission on its own; it works best as part of a broader infection-control program that still relies on rigorous hand hygiene. Environmental cleaning reduces contamination on surfaces but cannot fully prevent transmission if hand hygiene isn’t consistently practiced. Isolating every patient with infections is not practical and resources are better allocated to a consistent hand hygiene program as the foundational measure.

So, the most impactful approach is maintaining strict, consistent hand hygiene to interrupt transmission at its source.