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Prompt Inactivation of Coronavirus Using a 280 nm Light-Emitting Diode Cluster Device.
Mancini, Marilia Wellichan; Almeida-Lopes, Luciana; Jacinto, Gislaine Santos; Tsukamoto, Junko; Arns, Clarice Weis.
  • Mancini MW; Biophotonics Department, Institute of Research and Education in the Health Area (NUPEN), São Carlos, Brazil.
  • Almeida-Lopes L; Biophotonics Department, Institute of Research and Education in the Health Area (NUPEN), São Carlos, Brazil.
  • Jacinto GS; Animal Virology Laboratory, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil.
  • Tsukamoto J; Animal Virology Laboratory, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil.
  • Arns CW; Animal Virology Laboratory, Department of Genetics, Evolution, Microbiology and Immunology, Institute of Biology, University of Campinas, Campinas, Brazil.
Photobiomodul Photomed Laser Surg ; 40(4): 273-279, 2022 Apr.
Article in English | MEDLINE | ID: covidwho-1830952
ABSTRACT

Objective:

We report on the development and characterization of a UV-C light-emitting diode (LED) 280 nm cluster prototype device designed for the rapid disinfection of SARS-CoV-2 coronaviruses. The device was evaluated against the Betacoronavirus mouse hepatitis virus-3 strain, and its virucidal capacity was probed as a function of different applied UV-C doses versus different situations concerning irradiation distances.

Background:

UV-C LEDs are light emitters that offer advantages over low-pressure mercury lamps, such as quasimonochromaticity, lower electrical power consumption, instant on/off with the instant full-power operation, unlimited on/off cycles for disinfection schemes, and a much longer lifetime operation, in addition to portability aspects, as well as UV-C LEDs do not contain heavy metal in its composition such as mercury, found in ultraviolet germicidal irradiation (UVGI) lamps.

Results:

This novel device reached a 99.999% elimination rate at a distance of 9 cm at all the tested irradiation times (dose dependence), demonstrating that it took only 30 sec to achieve this inactivation rate. Its virucidal effectivity in rapid virus inactivation was demonstrated.

Conclusions:

We conclude that the HHUVCS cluster device (λp = 280 nm) provides a rapid virucidal effect against the SARS-CoV-2 coronavirus. The current research should encourage further advances in UV-C LED-based devices designed for the inactivation of SARS-CoV-2 virus on surfaces, in air, and in liquids.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: COVID-19 / Mercury Type of study: Experimental Studies Limits: Animals Language: English Journal: Photobiomodul Photomed Laser Surg Year: 2022 Document Type: Article Affiliation country: Photob.2021.0128

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Full text: Available Collection: International databases Database: MEDLINE Main subject: COVID-19 / Mercury Type of study: Experimental Studies Limits: Animals Language: English Journal: Photobiomodul Photomed Laser Surg Year: 2022 Document Type: Article Affiliation country: Photob.2021.0128