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Evidence has shown that environmental surfaces play an important role in the transmission of nosocomial pathogens. Deploying antimicrobial surfaces in hospital wards could reduce the role environmental surfaces play as reservoirs for pathogens. Herein we show a significant reduction in viable counts of  Staphylococcus epidermidis ,  Saccharomyces cerevisiae , and MS2 Bacteriophage after light treatment of a medical grade silicone incorporating crystal violet, methylene blue and 2 nm gold nanoparticles. Furthermore, a migration assay demonstrated that in the presence of light, growth of the fungus-like organism  Pythium ultimum  and the filamentous fungus  Botrytis cinerea  was inhibited. Atomic Force Microscopy showed significant alterations to the surface of  S .  epidermidis , and electron microscopy showed cellular aggregates connected by discrete surface linkages. We have therefore demonstrated that the embedded surface has a broad antimicrobial activity under white light and that the surface treatment causes bacterial envelope damage and cell aggregation.

A Light-Activated Antimicrobial Surface Is Active Against Bacterial, Viral and Fungal Organisms