Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/117854
Title: Ozone Eliminates SARS-CoV-2 from Difficult-to-Clean Office Supplies and Clinical Equipment
Authors: Torres Mata, Laura Beatriz 
García Pérez, Omar
Rodríguez Esparragón, Francisco Javier 
Blanco, Angeles
Villar, Jesús
Ruiz Apodaca, Fernando
Martín Barrasa, José Luis 
González Martín, Jesús M.
Serrano Aguilar, Pedro
Piñero, José E.
Córdoba Lanús, Elizabeth
Lorenzo Morales, Jacob
Clavo Varas, Bernardino 
UNESCO Clasification: 2414 Microbiología
Keywords: Clinical Equipment
Covid-19
Office Supplies
Ozone
Sars-Cov-2, et al
Issue Date: 2022
Journal: International Journal Of Environmental Research And Public Health
Abstract: (1) Background: Severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) continues to cause profound health, economic, and social problems worldwide. The management and disinfection of materials used daily in health centers and common working environments have prompted concerns about the control of coronavirus disease 2019 (COVID-19) infection risk. Ozone is a powerful oxidizing agent that has been widely used in disinfection processes for decades. The aim of this study was to assess the optimal conditions of ozone treatment for the elimination of heat-inactivated SARS-CoV-2 from office supplies (personal computer monitors, keyboards, and computer mice) and clinical equipment (continuous positive airway pressure tubes and personal protective equipment) that are difficult to clean. (2) Methods: The office supplies and clinical equipment were contaminated in an area of 1 cm2 with 1 × 104 viral units of a heat-inactivated SARS-CoV-2 strain, then treated with ozone using two different ozone devices: a specifically designed ozonation chamber (for low-medium ozone concentrations over large volumes) and a clinical ozone generator (for high ozone concentrations over small volumes). SARS-CoV-2 gene detection was carried out using quantitative real-time polymerase chain reaction (RT-qPCR). (3) Results: At high ozone concentrations over small surfaces, the ozone eliminated SARS-CoV-2 RNA in short time periods-i.e., 10 min (at 4000 ppm) or less. The optimum ozone concentration over large volumes was 90 ppm for 120 min in ambient conditions (24 °C and 60-75% relative humidity). (4) Conclusions: This study showed that the appropriate ozone concentration and exposure time eliminated heat-inactivated SARS-CoV-2 RNA from the surfaces of different widely used clinical and office supplies, decreasing their risk of transmission, and improving their reutilization. Ozone may provide an additional tool to control the spread of the COVID-19 pandemic.
URI: http://hdl.handle.net/10553/117854
ISSN: E1660-4601
DOI: 10.3390/ijerph19148672
Source: International journal of environmental research and public health[EISSN 1660-4601],v. 19 (14), (Julio 2022)
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