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Bello-Perez M, Esparza I, De la Encina A, Bartolome T, Molina T, Sanjuan E, Falco A, Enjuanes L, Sola I, Usera F. Pulsed-Xenon Ultraviolet Light Highly Inactivates Human Coronaviruses on Solid Surfaces, Particularly SARS-CoV-2. Int J Environ Res Public Health 2022; 19:ijerph192113780. [PMID: 36360660 PMCID: PMC9653743 DOI: 10.3390/ijerph192113780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 05/27/2023]
Abstract
In the context of ongoing and future pandemics, non-pharmaceutical interventions are critical in reducing viral infections and the emergence of new antigenic variants while the population reaches immunity to limit viral transmission. This study provides information on efficient and fast methods of disinfecting surfaces contaminated with different human coronaviruses (CoVs) in healthcare settings. The ability to disinfect three different human coronaviruses (HCoV-229E, MERS-CoV, and SARS-CoV-2) on dried surfaces with light was determined for a fully characterized pulsed-xenon ultraviolet (PX-UV) source. Thereafter, the effectiveness of this treatment to inactivate SARS-CoV-2 was compared to that of conventional low-pressure mercury UVC lamps by using equivalent irradiances of UVC wavelengths. Under the experimental conditions of this research, PX-UV light completely inactivated the CoVs tested on solid surfaces since the infectivity of the three CoVs was reduced up to 4 orders of magnitude by PX-UV irradiation, with a cumulated dose of as much as 21.162 mJ/cm2 when considering all UV wavelengths (5.402 mJ/cm2 of just UVC light). Furthermore, continuous irradiation with UVC light was less efficient in inactivating SARS-CoV-2 than treatment with PX-UV light. Therefore, PX-UV light postulates as a promising decontamination measure to tackle the propagation of future outbreaks of CoVs.
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Affiliation(s)
- Melissa Bello-Perez
- Department of Molecular and Cell Biology, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Iris Esparza
- Biosafety Service, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Arancha De la Encina
- Biosafety Service, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Teresa Bartolome
- Biosafety Service, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Teresa Molina
- CandelTEC S.L. Pol. Industrial L’Horta Vella, 8, 6, 46117 Betera, Spain
| | - Elena Sanjuan
- CandelTEC S.L. Pol. Industrial L’Horta Vella, 8, 6, 46117 Betera, Spain
| | - Alberto Falco
- Institute of Research, Development and Innovation in Healthcare Biotechnology in Elche (IDiBE), Miguel Hernández University (UMH), 03202 Elche, Spain
| | - Luis Enjuanes
- Department of Molecular and Cell Biology, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Isabel Sola
- Department of Molecular and Cell Biology, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
| | - Fernando Usera
- Biosafety Service, National Center of Biotechnology (CNB-CSIC), Campus Universidad Autónoma de Madrid, Darwin 3, 28049 Madrid, Spain
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Huber TW, Brackens E, Chatterjee P, Villamaria FC, Sisco LE, Williams MD, Coppin JD, Choi H, Jinadatha C. Efficacy of pulsed-xenon ultraviolet light on reduction of Mycobacterium fortuitum. SAGE Open Med 2020; 8:2050312120962372. [PMID: 33101679 PMCID: PMC7550950 DOI: 10.1177/2050312120962372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 09/07/2020] [Indexed: 11/17/2022] Open
Abstract
Objectives Hospitals and healthcare facilities rely largely on isolation and environmental disinfection to prevent transmission of pathogens. The use of no-touch technology is an accepted practice for environmental decontamination in medical care facilities, but little has been published about the effect of ultraviolet light generated by a portable pulsed-xenon device use on Mycobacteria. We used Mycobacterium fortuitum which is more resistant to ultraviolet radiation and less virulent than Mycobacterium tuberculosis, to determine the effectiveness of portable pulsed-xenon devices on Mycobacterium in a laboratory environment. Methods To determine the effectiveness of pulsed-xenon devices, we measured the bactericidal effect of pulsed-xenon devices on Mycobacterium fortuitum. Results In five separate experiments irradiating an average of 106 organisms, the mean (standard deviation) log-kill at 5 min was 3.98 (0.60), at 10 min was 4.96 (0.42), and at 15 min was 5.64 (0.52). Conclusions Our results demonstrate that using pulsed-xenon devices is a highly effective modality to reduce microbial counts with this relatively ultraviolet germicidal irradiation-resistant mycobacterium in a time-dependent manner.
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Affiliation(s)
- Thomas W Huber
- Research Service, Central Texas Veterans Health Care System, Temple, TX, USA
| | - Emma Brackens
- Research Service, Central Texas Veterans Health Care System, Temple, TX, USA
| | - Piyali Chatterjee
- Research Service, Central Texas Veterans Health Care System, Temple, TX, USA
| | - Frank C Villamaria
- Research Service, Central Texas Veterans Health Care System, Temple, TX, USA
| | - Lauren E Sisco
- Department of Internal Medicine, Baylor Scott & White Memorial Hospital, Temple, TX
| | - Marjory D Williams
- Research Service, Central Texas Veterans Health Care System, Temple, TX, USA
| | - John David Coppin
- Research Service, Central Texas Veterans Health Care System, Temple, TX, USA
| | - Hosoon Choi
- Research Service, Central Texas Veterans Health Care System, Temple, TX, USA
| | - Chetan Jinadatha
- Department of Internal Medicine, Baylor Scott & White Memorial Hospital, Temple, TX.,Medical Service, Central Texas Veterans Health Care System, Temple, TX, USA.,Department of Medicine, College of Medicine Texas A&M University, Bryan, TX, USA
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