Recently, several published studies have highlighted the role of biofilm on dry environmental surfaces in harboring and protecting multidrug-resistant bacteria in healthcare establishments. Vickery et al. demonstrated that biofilms on dry hospital surfaces are far more widespread than previously recognized. A following study by Hu et al. found bacteria dwelling in biofilm on over 90% of surfaces tested from an Intensive Care Unit (ICU), after two terminal cleanings. Furthermore, over 50% of these contained multidrug-resistant (MDR) bacteria. This work suggests that many commonly used disinfectants are not effective against bacteria within biofilms and that unless we consider the potential impact of these biofilms we are unlikely to attain the goal of reduced infection rates.
Medentech have recently registered an EPA claim for efficacy against bacteria in biofilm for their broad spectrum disinfectants.
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