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Handheld Multispectral Fluorescence Imaging System to Detect and Disinfect Surface Contamination.
Sueker, Mitchell; Stromsodt, Kristen; Gorji, Hamed Taheri; Vasefi, Fartash; Khan, Nadeem; Schmit, Taylor; Varma, Rangati; Mackinnon, Nicholas; Sokolov, Stanislav; Akhbardeh, Alireza; Liang, Bo; Qin, Jianwei; Chan, Diane E; Baek, Insuck; Kim, Moon S; Tavakolian, Kouhyar.
  • Sueker M; Biomedical Engineering Program, University of North Dakota, Grand Forks, ND 58202, USA.
  • Stromsodt K; Biomedical Engineering Program, University of North Dakota, Grand Forks, ND 58202, USA.
  • Gorji HT; Biomedical Engineering Program, University of North Dakota, Grand Forks, ND 58202, USA.
  • Vasefi F; SafetySpect Inc., 4200 James Ray Dr., Grand Forks, ND 58202, USA.
  • Khan N; School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USA.
  • Schmit T; School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USA.
  • Varma R; School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202, USA.
  • Mackinnon N; SafetySpect Inc., 4200 James Ray Dr., Grand Forks, ND 58202, USA.
  • Sokolov S; SafetySpect Inc., 4200 James Ray Dr., Grand Forks, ND 58202, USA.
  • Akhbardeh A; SafetySpect Inc., 4200 James Ray Dr., Grand Forks, ND 58202, USA.
  • Liang B; Biomedical Engineering Program, University of North Dakota, Grand Forks, ND 58202, USA.
  • Qin J; USDA/ARS Environmental Microbial and Food Safety Laboratory, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA.
  • Chan DE; USDA/ARS Environmental Microbial and Food Safety Laboratory, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA.
  • Baek I; USDA/ARS Environmental Microbial and Food Safety Laboratory, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA.
  • Kim MS; USDA/ARS Environmental Microbial and Food Safety Laboratory, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA.
  • Tavakolian K; Biomedical Engineering Program, University of North Dakota, Grand Forks, ND 58202, USA.
Sensors (Basel) ; 21(21)2021 Oct 30.
Article in English | MEDLINE | ID: covidwho-1512564
ABSTRACT
Contamination inspection is an ongoing concern for food distributors, restaurant owners, caterers, and others who handle food. Food contamination must be prevented, and zero tolerance legal requirements and damage to the reputation of institutions or restaurants can be very costly. This paper introduces a new handheld fluorescence-based imaging system that can rapidly detect, disinfect, and document invisible organic residues and biofilms which may host pathogens. The contamination, sanitization inspection, and disinfection (CSI-D) system uses light at two fluorescence excitation wavelengths, ultraviolet C (UVC) at 275 nm and violet at 405 nm, for the detection of organic residues, including saliva and respiratory droplets. The 275 nm light is also utilized to disinfect pathogens commonly found within the contaminated residues. Efficacy testing of the neutralizing effects of the ultraviolet light was conducted for Aspergillus fumigatus, Streptococcus pneumoniae, and the influenza A virus (a fungus, a bacterium, and a virus, respectively, each commonly found in saliva and respiratory droplets). After the exposure to UVC light from the CSI-D, all three pathogens experienced deactivation (> 99.99%) in under ten seconds. Up to five-log reductions have also been shown within 10 s of UVC irradiation from the CSI-D system.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Ultraviolet Rays / Disinfection Language: English Year: 2021 Document Type: Article Affiliation country: S21217222

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Ultraviolet Rays / Disinfection Language: English Year: 2021 Document Type: Article Affiliation country: S21217222