Efficacy of pulsed xenon ultraviolet disinfection of multidrug-resistant bacteria and Clostridioides difficile spores

UV Irradiation as a Disinfection Method to Reduce Covid-19 Cross-Contamination in Dentistry: A Scoping Review

“…Currently, new technologies are being used without the presence of mercury, such as xenon pulsed light (200 to 300nm) that is emitted in a short duration, high pulse intensity, requiring a shorter exposure time [1,36,39], and the technology based on LED (light emitting diode), which proposes the use of smaller equipment, with fast start up time and equal efficiency, however, with low energy load [40]. Regardless of the source of ultraviolet light, the most effective wavelength is 254nm [36,[39][40][41][42][43][44][45]. After UV irradiation, the DNA sequence of microorganisms can form pyrimidine dimers, which can interfere with DNA duplication, as well as lead to the destruction of nucleic acids and make viruses non-infectious [44].…”

“…The use of touchless disinfection reduces the risk of human errors arising from traditional manual cleaning. UV disinfection is less effective in shaded areas because it receives a lower dose of UV compared to directly exposed areas [26,43]. Kitagawa et al [43] (2020) carried out a study that visually showed that areas that were protected against PX-UV light remained with the growth of microorganisms.…”

“…UV disinfection is less effective in shaded areas because it receives a lower dose of UV compared to directly exposed areas [26,43]. Kitagawa et al [43] (2020) carried out a study that visually showed that areas that were protected against PX-UV light remained with the growth of microorganisms. Therefore, if not handled well, UV light is also prone to human error.…”

“…Therefore, if not handled well, UV light is also prone to human error. They concluded that in order to obtain adequate disinfection of a hospital environment it is necessary that it is tidy, the use of an ideal device for the environment to be disinfected and its correct handling must be used [43]. Dexter et al [26] (2020) clarify that the best form of disinfection is the manual one followed by UV-C light, and as the whole process takes around 1 hour, depending on the number of employees engaged to do so, and if the UV-C light machine needs circulate or not, it is advisable, if possible, to interchange service rooms [26].…”

Rapid and Efficient Inactivation of SARS-CoV-2 from Surfaces using UVC Light Emitting Diode Device

“…Germicidal ultraviolet C (UVC) irradiation has proven to be effective to inactivate pathogens from air and surfaces in public areas. [18][19][20][21][22][23] Here we describe a next generation NuvaWave device that generate UVC germicidal irradiation. NuvaWave is a powerful, lightweight, intelligent, UVC handheld device operating at 270 nm, near the peak of germicidal efficacy.…”