Light-activated antibacterial screen protectors for mobile telephones and tablet computers

Page, Kristopher; Correia, Annapaula; Wilson, Michael; Allan, Elaine; Parkin, Ivan P.

doi:10.1016/j.jphotochem.2014.08.011

Cited by 21 publications

(13 citation statements)

References 36 publications

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“…The mechanical properties of the photoactive material (e.g., elasticity) were not affected, confirming the possibility to be incorporated in catheters in order to reduce catheter acquired infections [ 58 , 59 ]. Since then, and following the same approach, this group prepared other photoactive materials based on polymers (polyurethane, silicone) and other materials used in catheters and in hospital touch surfaces (screen protectors for telephones and tablets, covers, keyboards, and hand dryers) embedded with PSs [MB, toluidine blue O (TBO), crystal violet] and AuNP against methicillin-resistant S. aureus (MRSA), S. epidermidis , Saccharomyces cerevisiae , E. coli , Bacteriophage MS2, the fungus-like organism Pythium ultimum , and the filamentous fungus Botrytis cinereal , and the results showed an effective inactivation of all microorganisms [ 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 ].…”

Section: Metal Nanoparticlesmentioning

confidence: 99%

Revisiting Current Photoactive Materials for Antimicrobial Photodynamic Therapy

et al. 2018

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Microbial infection is a severe concern, requiring the use of significant amounts of antimicrobials/biocides, not only in the hospital setting, but also in other environments. The increasing use of antimicrobial drugs and the rapid adaptability of microorganisms to these agents, have contributed to a sharp increase of antimicrobial resistance. It is obvious that the development of new strategies to combat planktonic and biofilm-embedded microorganisms is required. Photodynamic inactivation (PDI) is being recognized as an effective method to inactivate a broad spectrum of microorganisms, including those resistant to conventional antimicrobials. In the last few years, the development and biological assessment of new photosensitizers for PDI were accompanied by their immobilization in different supports having in mind the extension of the photodynamic principle to new applications, such as the disinfection of blood, water, and surfaces. In this review, we intended to cover a significant amount of recent work considering a diversity of photosensitizers and supports to achieve an effective photoinactivation. Special attention is devoted to the chemistry behind the preparation of the photomaterials by recurring to extensive examples, illustrating the design strategies. Additionally, we highlighted the biological challenges of each formulation expecting that the compiled information could motivate the development of other effective photoactive materials.

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Section: Metal Nanoparticlesmentioning

confidence: 99%

Revisiting Current Photoactive Materials for Antimicrobial Photodynamic Therapy

et al. 2018

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“…epidermidis , Saccharomyces cerevisiae , E . coli , bacteriophage MS2 , the fungus-like organism Pythium ultimum , and the filamentous fungus Botrytis cinerea [94,95,96,97,98,99,100,101].…”

Section: Photodynamic Therapy As An Alternative Approach In the Comentioning

confidence: 99%

Blue Light Disinfection in Hospital Infection Control: Advantages, Drawbacks, and Pitfalls

Morais-Cabral

2019

Antibiotics

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Hospital acquired infections (HAIs) are a serious problem that potentially affects millions of patients whenever in contact with hospital settings. Worsening the panorama is the emergence of antimicrobial resistance by most microorganisms implicated in HAIs. Therefore, the improvement of the actual surveillance methods and the discovery of alternative approaches with novel modes of action is vital to overcome the threats created by the emergence of such resistances. Light therapy modalities represent a viable and effective alternative to the conventional antimicrobial treatment and can be preponderant in the control of HAIs, even against multidrug resistant organisms (MDROs). This review will initially focus on the actual state of HAIs and MDROs and which methods are currently available to fight them, which is followed by the exploration of antimicrobial photodynamic therapy (aPDT) and antimicrobial blue light therapy (aBLT) as alternative approaches to control microorganisms involved in HAIs. The advantages and drawbacks of BLT relatively to aPDT and conventional antimicrobial drugs as well as its potential applications to destroy microorganisms in the healthcare setting will also be discussed.

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“…A promising and attractive solution is the emerging technology of self-cleaning antimicrobial surface coatings, many of which are commercially available, e.g. for tablets/smartphones [ 55 – 57 ]. With respect to the model presented in this paper, these coatings would have significant impact on the pathogen half-life parameter, t 1/2 , ( figure 3 b ).…”

Section: Discussionmentioning

confidence: 99%

Modelling disease transmission from touchscreen user interfaces

2021

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The extensive use of touchscreens for all manner of human–computer interactions has made them plausible instruments of touch-mediated disease transmission. To that end, we employ stochastic simulations to model human–fomite interaction with a distinct focus on touchscreen interfaces. The timings and frequency of interactions from within a closed population of infectious and susceptible individuals was modelled using a queuing network. A pseudo-reproductive number R was used to compare outcomes under various parameter conditions. We then apply the simulation to a specific real-world scenario; namely that of airport self-check-in and baggage drop. A counterintuitive result was that R decreased with increased touch rates required for touchscreen interaction. Additionally, as one of few parameters to be controlled, the rate of cleaning/disinfecting screens plays an essential role in mitigating R , though alternative technological strategies could prove more effective. The simulation model developed provides a foundation for future advances in more sophisticated fomite disease-transmission modelling.

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Light-activated antibacterial screen protectors for mobile telephones and tablet computers

Cited by 21 publications

References 36 publications

Revisiting Current Photoactive Materials for Antimicrobial Photodynamic Therapy

Revisiting Current Photoactive Materials for Antimicrobial Photodynamic Therapy

Blue Light Disinfection in Hospital Infection Control: Advantages, Drawbacks, and Pitfalls

Modelling disease transmission from touchscreen user interfaces

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