SEM Study of the Photocatalytic Activity of SnO2 Films Exposed to UV Radiation Against the Human Pathogen C. albicans

Biofilm integrity and cytomorphology of Candida albicans after exposure to UV-light on ZnO thin films: SEM Analysis

“…As reported in previous publications , UV radiation decreases the number of yeast on the surface of photocatalytic thin films [1] and, as it can be observed in 500X micrographs (Figure 1), the number of cells is lower after 60 minutes of exposure. It can also be noted that the morphology of yeast tends to change to pseudohyphae after the treatment with UV light, this result was expected since genetic stress is known to promote the appearance of pseudohyphae, and ionizing radiation is a direct cause of genotoxicity [2].…”

“…Because of the impact of hospital adapted pathogens in the health care systems, the development of new strategies of disinfection to prevent the spread of infections should be considered top priority. A suggested strategy is the use of photocatalytic coatings consisting in metal oxides, which are being tested as potential antimicrobial technology [1] with promising results. The present work is focused in the analysis of the effect of UV-light to disinfect Zinc Oxide (ZnO) thin films inoculated with C. albicans from the SEM analysis perspective.…”

Electron microscopy analysis of biofilms produced by Staphylococcus aureus exposed to UV-light on the surface of SnO2 thin films

“…Synthesis of SnO 2 thin films were performed by the spray pyrolysis method by addition of Tin chloride to an80ºC heated glass surface (slides). Thin films characterization was performed by X-Ray diffraction, SEM (JSM-5800LV) microscopy and EDS (results reported in previous publication) [2]. Staphylococcus aureus ATCC 29213 was stored in Brain-Heart infusion until use in antimicrobial assays.…”