A New Study Says Daily Room Cleaning Does Not Stop Superbugs. Here Is What Actually Works.

Irvine, California — Nursing homes have long relied on enhanced environmental cleaning to combat dangerous drug-resistant bacteria. But new research from two Southern California facilities suggests that strategy may not deliver the results operators expect.

A quality improvement study published yesterday in JAMA Network Open found that universal decolonization of residents — not enhanced room cleaning — was the key driver in reducing multidrug-resistant organism (MDRO) carriage and bedroom contamination.

The four-phase study, conducted by researchers at the University of California Irvine School of Medicine, compared different infection control approaches across sequential periods: universal decolonization only, routine care as a control, once-daily enhanced cleaning only, and a combination of both strategies.

Decolonization Delivered Results

The findings were striking. Decolonization alone was associated with a 59% reduction in MDRO carriage compared with the control phase and a 64% reduction compared with enhanced cleaning alone. Enhanced cleaning by itself did not reduce MDRO carriage at all, and adding it to decolonization provided no additional benefit.

Bedroom contamination followed the same pattern. Decolonization alone cut bedroom contamination by 84% versus the control phase and by 74% compared with enhanced cleaning. Again, enhanced cleaning alone showed no effect.

Only in common areas did the combined intervention outperform either strategy alone, suggesting that post-activity disinfection in shared spaces still has value.

Why This Matters for Operators

MDROs are endemic in nursing homes, with studies showing more than half of residents carry these dangerous bacteria on their skin. Using chlorhexidine wipes and nasal products to decolonize residents has been proven to reduce MDRO carriage, subsequent infections, hospitalizations, and deaths.

But implementing multiple infection control strategies is expensive and resource-intensive. The researchers concluded that resource-constrained facilities should prioritize decolonization strategies alongside targeted disinfection in shared spaces for effective MDRO prevention.

The message for operators is clear: when budgets are tight, resident decolonization delivers more bang for the buck than room cleaning alone.