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Little P, Vennik J, Rumsby K, Stuart B, Becque T, Moore M, Francis N, Hay AD, Verheij T, Bradbury K, Greenwell K, Dennison L, Holt S, Denison-Day J, Ainsworth B, Raftery J, Thomas T, Butler CC, Richards-Hall S, Smith D, Patel H, Williams S, Barnett J, Middleton K, Miller S, Johnson S, Nuttall J, Webley F, Sach T, Yardley L, Geraghty AWA. Nasal sprays and behavioural interventions compared with usual care for acute respiratory illness in primary care: a randomised, controlled, open-label, parallel-group trial. THE LANCET. RESPIRATORY MEDICINE 2024; 12:619-632. [PMID: 39004091 DOI: 10.1016/s2213-2600(24)00140-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 04/10/2024] [Accepted: 04/22/2024] [Indexed: 07/16/2024]
Abstract
BACKGROUND A small amount of evidence suggests that nasal sprays, or physical activity and stress management, could shorten the duration of respiratory infections. This study aimed to assess the effect of nasal sprays or a behavioural intervention promoting physical activity and stress management on respiratory illnesses, compared with usual care. METHODS This randomised, controlled, open-label, parallel-group trial was done at 332 general practitioner practices in the UK. Eligible adults (aged ≥18 years) had at least one comorbidity or risk factor increasing their risk of adverse outcomes due to respiratory illness (eg, immune compromise due to serious illness or medication; heart disease; asthma or lung disease; diabetes; mild hepatic impairment; stroke or severe neurological problem; obesity [BMI ≥30 kg/m2]; or age ≥65 years) or at least three self-reported respiratory tract infections in a normal year (ie, any year before the COVID-19 pandemic). Participants were randomly assigned (1:1:1:1) using a computerised system to: usual care (brief advice about managing illness); gel-based spray (two sprays per nostril at the first sign of an infection or after potential exposure to infection, up to 6 times per day); saline spray (two sprays per nostril at the first sign of an infection or after potential exposure to infection, up to 6 times per day); or a brief behavioural intervention in which participants were given access to a website promoting physical activity and stress management. The study was partially masked: neither investigators nor medical staff were aware of treatment allocation, and investigators who did the statistical analysis were unaware of treatment allocation. The sprays were relabelled to maintain participant masking. Outcomes were assessed using data from participants' completed monthly surveys and a survey at 6 months. The primary outcome was total number of days of illness due to self-reported respiratory tract illnesses (coughs, colds, sore throat, sinus or ear infections, influenza, or COVID-19) in the previous 6 months, assessed in the modified intention-to-treat population, which included all randomly assigned participants who had primary outcome data available. Key secondary outcomes were possible harms, including headache or facial pain, and antibiotic use, assessed in all randomly assigned participants. This trial was registered with ISRCTN, 17936080, and is closed to recruitment. FINDINGS Between Dec 12, 2020, and April 7, 2023, of 19 475 individuals screened for eligibility, 13 799 participants were randomly assigned to usual care (n=3451), gel-based nasal spray (n=3448), saline nasal spray (n=3450), or the digital intervention promoting physical activity and stress management (n=3450). 11 612 participants had complete data for the primary outcome and were included in the primary outcome analysis (usual care group, n=2983; gel-based spray group, n=2935; saline spray group, n=2967; behavioural website group, n=2727). Compared with participants in the usual care group, who had a mean of 8·2 (SD 16·1) days of illness, the number of days of illness was significantly lower in the gel-based spray group (mean 6·5 days [SD 12·8]; adjusted incidence rate ratio [IRR] 0·82 [99% CI 0·76-0·90]; p<0·0001) and the saline spray group (6·4 days [12·4]; 0·81 [0·74-0·88]; p<0·0001), but not in the group allocated to the behavioural website (7·4 days [14·7]; 0·97 [0·89-1·06]; p=0·46). The most common adverse event was headache or sinus pain in the gel-based group: 123 (4·8%) of 2556 participants in the usual care group; 199 (7·8%) of 2498 participants in the gel-based group (risk ratio 1·61 [95% CI 1·30-1·99]; p<0·0001); 101 (4·5%) of 2377 participants in the saline group (0·81 [0·63-1·05]; p=0·11); and 101 (4·5%) of 2091 participants in the behavioural intervention group (0·95 [0·74-1·22]; p=0·69). Compared with usual care, antibiotic use was lower for all interventions: IRR 0·65 (95% CI 0·50-0·84; p=0·001) for the gel-based spray group; 0·69 (0·45-0·88; p=0·003) for the saline spray group; and 0·74 (0·57-0·94; p=0·02) for the behavioural website group. INTERPRETATION Advice to use either nasal spray reduced illness duration and both sprays and the behavioural website reduced antibiotic use. Future research should aim to address the impact of the widespread implementation of these simple interventions. FUNDING National Institute for Health and Care Research.
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Affiliation(s)
- Paul Little
- Primary Care Research Centre, University of Southampton, Southampton, UK.
| | - Jane Vennik
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Kate Rumsby
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Beth Stuart
- Wolfson Institute of Population Health, Faculty of Medicine and Dentistry, Queen Mary University, London, UK
| | - Taeko Becque
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Michael Moore
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Nick Francis
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Alastair D Hay
- Centre for Academic Primary Care, Bristol Medical School, University of Bristol, Bristol, UK; Population Health Sciences, University of Bristol, Bristol, UK
| | - Theo Verheij
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, Netherlands
| | | | - Kate Greenwell
- School of Psychology, University of Southampton, Southampton, UK
| | - Laura Dennison
- School of Psychology, University of Southampton, Southampton, UK
| | - Sian Holt
- School of Psychology, University of Southampton, Southampton, UK
| | | | - Ben Ainsworth
- School of Psychology, University of Southampton, Southampton, UK
| | - James Raftery
- Health Economics Analysis Team, University of Southampton, Southampton, UK
| | - Tammy Thomas
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Christopher C Butler
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, UK
| | | | - Deb Smith
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Hazel Patel
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Samantha Williams
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Jane Barnett
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Karen Middleton
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Sascha Miller
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Sophie Johnson
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Jacqui Nuttall
- Southampton Clinical Trials Unit, University of Southampton, Southampton, UK
| | - Fran Webley
- Southampton Clinical Trials Unit, University of Southampton, Southampton, UK
| | - Tracey Sach
- Primary Care Research Centre, University of Southampton, Southampton, UK
| | - Lucy Yardley
- School of Psychology, University of Southampton, Southampton, UK; School of Psychological Science, University of Bristol, Bristol, UK
| | - Adam W A Geraghty
- Primary Care Research Centre, University of Southampton, Southampton, UK
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Mahmudiono T, Ramaiah P, Maleki H, Doewes RI, Shalaby MN, Alsaikhan F, Mohammadi MJ. Evaluation of the impact of different disinfectants on new coronavirus and human health. REVIEWS ON ENVIRONMENTAL HEALTH 2023; 38:451-460. [PMID: 35508445 DOI: 10.1515/reveh-2022-0051] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 04/17/2022] [Indexed: 02/07/2023]
Abstract
A new health threat was appeared in 2019 known as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) or coronavirus disease 2019 (COVID-19). The new coronavirus distributed all over the world and caused millions of deaths. One way to incomplete the process of COVID-19 transfer from one person to another is using disinfectants. A narrative review study was done on manuscript published documents about the stability of the virus, different types of disinfectants and the effects of disinfectants on SARS-CoV2 and environment from 2005 to 2022 based on Searched databases included Google Scholar, Springer, PubMed, Web of Science and Science Direct (Scopus). All relevant studies published 2005 until 2022 gathered. According to the databases, 670 articles were retrieved. Thirty studies were screened after review and 30 full-text articles entered into the analysis process. Finally, 14 articles were selected in this study. New coronavirus could survive until 9 days in room temperature; the surviving time decreases if temperature increases. The virus can survive in various plastic, glass, and metal surfaces for hours to days. Disinfectants, such as alcohol, isopropanol, formaldehyde, glutaraldehyde, and ethanol, can kill 70-90% viruses in up to 30 s but should be noted that these disinfectants are recognized by Occupational Safety and Health Administration (OSHA) as a potential carcinogen. According to the different reports, increased duration and level of disinfectant exposure can have negative impacts on human and animal health including upper and lower respiratory tract irritation, inflammation, edema, ulceration, and allergic reactions.
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Affiliation(s)
- Trias Mahmudiono
- Department of Nutrition, Faculty of Public Health, Universitas Airlangga, Surabaya, Indonesia
| | | | - Heydar Maleki
- Department of Environmental Health Engineering, School of Public Health, Student Research Committee, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | | | - Mohammed Nader Shalaby
- Biological Sciences and Sports Health Department, Faculty of Physical Education, Suez Canal University, Ismailia, Egypt
| | - Fahad Alsaikhan
- Department of Clinical Pharmacy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Alkharj, Kingdom of Saudi Arabia
| | - Mohammad Javad Mohammadi
- Department of Environmental Health Engineering, School of Public Health and Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Moon Y. Gut distress and intervention via communications of SARS-CoV-2 with mucosal exposome. Front Public Health 2023; 11:1098774. [PMID: 37139365 PMCID: PMC10150023 DOI: 10.3389/fpubh.2023.1098774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 03/27/2023] [Indexed: 05/05/2023] Open
Abstract
Acute coronavirus disease 2019 (COVID-19) has been associated with prevalent gastrointestinal distress, characterized by fecal shedding of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA or persistent antigen presence in the gut. Using a meta-analysis, the present review addressed gastrointestinal symptoms, such as nausea, vomiting, abdominal pain, and diarrhea. Despite limited data on the gut-lung axis, viral transmission to the gut and its influence on gut mucosa and microbial community were found to be associated by means of various biochemical mechanisms. Notably, the prolonged presence of viral antigens and disrupted mucosal immunity may increase gut microbial and inflammatory risks, leading to acute pathological outcomes or post-acute COVID-19 symptoms. Patients with COVID-19 exhibit lower bacterial diversity and a higher relative abundance of opportunistic pathogens in their gut microbiota than healthy controls. Considering the dysbiotic changes during infection, remodeling or supplementation with beneficial microbial communities may counteract adverse outcomes in the gut and other organs in patients with COVID-19. Moreover, nutritional status, such as vitamin D deficiency, has been associated with disease severity in patients with COVID-19 via the regulation of the gut microbial community and host immunity. The nutritional and microbiological interventions improve the gut exposome including the host immunity, gut microbiota, and nutritional status, contributing to defense against acute or post-acute COVID-19 in the gut-lung axis.
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Affiliation(s)
- Yuseok Moon
- Laboratory of Mucosal Exposome and Biomodulation, Department of Integrative Biomedical Sciences, Pusan National University, Yangsan-si, Republic of Korea
- Biomedical Research Institute, Pusan National University, Busan, Republic of Korea
- Graduate Program of Genomic Data Sciences, Pusan National University, Yangsan-si, Republic of Korea
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de Oliveira SV, Neves FDD, dos Santos DC, Monteiro MBB, Schaufelberger MS, Motta BN, de Oliveira IP, Setúbal Destro Rodrigues MF, Franco ALDS, Cecatto RB. The effectiveness of phototherapy for surface decontamination against SARS-Cov-2. A systematic review. JOURNAL OF BIOPHOTONICS 2023; 16:e202200306. [PMID: 36560919 PMCID: PMC9880673 DOI: 10.1002/jbio.202200306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 12/19/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
COVID-19 appeared in December 2019, needing efforts of science. Besides, a range of light therapies (photodynamic therapy, ultraviolet [UV], laser) has shown scientific alternatives to conventional decontamination therapies. Investigating the efficacy of light-based therapies for environment decontamination against SARS-CoV2, a PRISMA systematic review of Phototherapies against SARS-CoV or MERS-CoV species discussing changes in viral RT-PCR was done. After searching MEDLINE/PubMed, EMBASE, and Literatura Latino-Americana e do Caribe em Ciências da Saúde we have found studies about cell cultures irradiation (18), blood components irradiation (10), N95 masks decontamination (03), inanimate surface decontamination (03), aerosols decontamination (03), hospital rooms irradiation (01) with PDT, LED, and UV therapy. The best quality results showed an effective low time and dose UV irradiation for environments and inanimate surfaces without human persons as long as the devices have safety elements dependent on the surfaces, viral charge, humidity, radiant exposure. To interpersonal contamination in humans, PDT or LED therapy seems very promising and are encouraged.
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Affiliation(s)
- Susyane Vieira de Oliveira
- Post Graduate Program Biophotonics Applied to Health Sciences, Universidade Nove de Julho/UNINOVESao PauloBrazil
| | | | | | | | | | | | | | | | | | - Rebeca Boltes Cecatto
- Post Graduate Program Biophotonics Applied to Health Sciences, Universidade Nove de Julho/UNINOVESao PauloBrazil
- Instituto do Cancer do Estado de Sao Paulo, School of Medicine of the University of Sao PauloSao PauloBrazil
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Dong B, Zhang X, Bai J, Zhang G, Li C, Lin W. Epidemiological investigation of canine coronavirus infection in Chinese domestic dogs: A systematic review and data synthesis. Prev Vet Med 2022; 209:105792. [DOI: 10.1016/j.prevetmed.2022.105792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 10/19/2022] [Accepted: 10/23/2022] [Indexed: 11/17/2022]
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Mousazadeh M, Kabdaşlı I, Khademi S, Sandoval MA, Moussavi SP, Malekdar F, Gilhotra V, Hashemi M, Dehghani MH. A critical review on the existing wastewater treatment methods in the COVID-19 era: What is the potential of advanced oxidation processes in combatting viral especially SARS-CoV-2? JOURNAL OF WATER PROCESS ENGINEERING 2022; 49:103077. [PMID: 35990175 PMCID: PMC9381433 DOI: 10.1016/j.jwpe.2022.103077] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/19/2022] [Accepted: 08/15/2022] [Indexed: 06/01/2023]
Abstract
The COVID-19 epidemic has put the risk of virus contamination in water bodies on the horizon of health authorities. Hence, finding effective ways to remove the virus, especially SARS-CoV-2, from wastewater treatment plants (WWTPs) has emerged as a hot issue in the last few years. Herein, this study first deals with the fate of SARS-CoV-2 genetic material in WWTPs, then critically reviews and compares different wastewater treatment methods for combatting COVID-19 as well as to increase the water quality. This critical review sheds light the efficiency of advanced oxidation processes (AOPs) to inactivate virus, specially SARS-CoV-2 RNA. Although several physicochemical treatment processes (e.g. activated sludge) are commonly used to eliminate pathogens, AOPs are the most versatile and effective virus inactivation methods. For instance, TiO2 is the most known and widely studied photo-catalyst innocuously utilized to degrade pollutants as well as to photo-induce bacterial and virus disinfection due to its high chemical resistance and efficient photo-activity. When ozone is dissolved in water and wastewater, it generates a wide spectrum of the reactive oxygen species (ROS), which are responsible to degrade materials in virus membranes resulting in destroying the cell wall. Furthermore, electrochemical advanced oxidation processes act through direct oxidation when pathogens react at the anode surface or by indirect oxidation through oxidizing species produced in the bulk solution. Consequently, they represent a feasible choice for the inactivation of a wide range of pathogens. Nonetheless, there are some challenges with AOPs which should be addressed for application at industrial-scale.
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Affiliation(s)
- Milad Mousazadeh
- Social Determinants of Health Research Center, Research Institute for Prevention of Non-Communicable Diseases, Qazvin University of Medical Sciences, Qazvin, Iran
- Department of Environmental Health Engineering, School of Health, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Işık Kabdaşlı
- İstanbul Technical University, Civil Engineering Faculty, Environmental Engineering Department, Ayazağa Campus, 34469 Maslak, İstanbul, Turkey
| | - Sara Khademi
- Health, Safety, and Environment Specialist, North Drilling Company, Ahvaz, Iran
| | - Miguel Angel Sandoval
- Universidad de Santiago de Chile USACH, Facultad de Química y Biología, Departamento de Química de los Materiales, Laboratorio de Electroquímica Medio Ambiental, LEQMA, Casilla 40, Correo 33, Santiago, Chile
- Universidad de Guanajuato, División de Ciencias Naturales y Exactas, Departamento de Ingeniería Química, Noria Alta S/N, 36050, Guanajuato, Guanajuato, Mexico
| | | | - Fatemeh Malekdar
- Department of Foot and Mouth Disease Vaccine Production, Razi Vaccine and Serum Research Institute, Karaj, Iran
| | - Vishakha Gilhotra
- Department of Botanical and Environmental Sciences, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Marjan Hashemi
- Environmental and Occupational Hazards Control Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Hadi Dehghani
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
- Institute for Environmental Research, Center for Solid Waste Research, Tehran University of Medical Sciences, Tehran, Iran
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Xiao S, Yuan Z, Huang Y. Disinfectants against SARS-CoV-2: A Review. Viruses 2022; 14:v14081721. [PMID: 36016342 PMCID: PMC9413547 DOI: 10.3390/v14081721] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/22/2022] [Accepted: 08/01/2022] [Indexed: 11/16/2022] Open
Abstract
The pandemic due to Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) has emerged as a serious global public health issue. Besides the high transmission rate from individual to individual, indirect transmission from inanimate objects or surfaces poses a more significant threat. Since the start of the outbreak, the importance of respiratory protection, social distancing, and chemical disinfection to prevent the spread of the virus has been the prime focus for infection control. Health regulatory organizations have produced guidelines for the formulation and application of chemical disinfectants to manufacturing industries and the public. On the other hand, extensive literature on the virucidal efficacy testing of microbicides for SARS-CoV-2 has been published over the past year and a half. This review summarizes the studies on the most common chemical disinfectants and their virucidal efficacy against SARS-CoV-2, including the type and concentration of the chemical disinfectant, the formulation, the presence of excipients, the exposure time, and other critical factors that determine the effectiveness of chemical disinfectants. In this review, we also critically appraise these disinfectants and conduct a discussion on the role they can play in the COVID-19 pandemic.
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Affiliation(s)
- Shuqi Xiao
- Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan 430020, China
| | - Zhiming Yuan
- National Biosafety Laboratory, Chinese Academy of Sciences, Wuhan 430020, China
| | - Yi Huang
- National Biosafety Laboratory, Chinese Academy of Sciences, Wuhan 430020, China
- Correspondence:
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Confirmatory Virucidal Activity of Ionised Active Water S-100® on the SARS-CoV-2 Virus. Adv Virol 2022; 2022:5995775. [PMID: 35756712 PMCID: PMC9232342 DOI: 10.1155/2022/5995775] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 06/01/2022] [Indexed: 11/17/2022] Open
Abstract
Ionised active water S-100® has been proposed as an original solution for use in dermocosmetics and for the treatment of wounds such as burns and atopic dermatitis. Among the mechanisms of action that are not completely understood, an antimicrobial activity would appear to be important. In the context of the COVID-19 pandemic, we assessed the inactivating efficacy of this solution on SARS-CoV-2 based on the recommendations of the NF-EN-14476+A2 standard. The tests carried out demonstrated that ionised active water S-100® 40% has a virucidal activity on SARS-CoV-2 which is at least 3.1 log after a contact time of 30 seconds and 3.5 log after two minutes at 20°C under clean conditions. Assays were also performed at 4°C and 37°C, and the results obtained are identical to those obtained at 20°C. This demonstration of the virucidal effect of ionised water against SARS-CoV-2 paves the way for the development of usage as an alternative disinfectant in SARS-CoV-2 control.
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Abstract
Microbiota in the gastrointestinal system is a major determinant in health and disease status with its influence on immunity. Bidirectional relationship between gut microbiota and host immune system is well balanced in healthy individuals and a disruption (dysbiosis) can lead to gastrointestinal inflammations and metabolic disorders. Growing evidence support the cross-talk between gastrointestinal microbiota and lung that maintains host homeostasis and reduces the risk of disease development. The Gut-lung axis is possibly involved in the severity of COVID-19 with the association of dysbiosis. Targeted alterations in the gut microbiota could be considered to alleviate the disease severity.
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Hossain MK, Hassanzadeganroudsari M, Feehan J, Apostolopoulos V. The race for a COVID-19 vaccine: where are we up to? Expert Rev Vaccines 2021; 21:355-376. [PMID: 34937492 DOI: 10.1080/14760584.2022.2021074] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
INTRODUCTION A novel strain of coronavirus, SARS-CoV-2, has triggered a global pandemic of coronavirus disease (COVID-19) in late 2019. In January 2020, the WHO declared this pandemic a public health emergency. This pandemic has already caused over 5.3 million deaths from more than 272 million infections. The development of a successful vaccine is an urgent global priority to halt the spread of SARS-CoV-2 and prevent further fatalities. Researchers are fast-tracking this process, and there have already been significant developments in preclinical and clinical phases in a relatively short period of time. Some vaccines have been approved either for emergency use or mass application in recent months. AREAS COVERED Herein, we provide a general understanding of the fast-tracked clinical trial procedures and highlight recent successes in preclinical and clinical trials to generate a clearer picture of the progress of COVID-19 vaccine development. EXPERT OPINION A good number of vaccines have been rolled out within a short period a feat unprecedented in medical history. However, the emergence of new variants over time has appeared as a new threat, and the number of infections and casualties is still on the rise and this is going to be an ongoing battle.
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Affiliation(s)
- Md Kamal Hossain
- Institute for Health and Sport, Victoria University, Melbourne, Australia
| | | | - Jack Feehan
- Institute for Health and Sport, Victoria University, Melbourne, Australia.,Department of Medicine The University of Melbourne, Melbourne, Australia
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Viral Inactivation with Emphasis on SARS-CoV-2 Using Physical and Chemical Disinfectants. ScientificWorldJournal 2021; 2021:9342748. [PMID: 34712107 PMCID: PMC8548178 DOI: 10.1155/2021/9342748] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2021] [Accepted: 10/02/2021] [Indexed: 11/17/2022] Open
Abstract
Background Recently, an outbreak of a novel human coronavirus SARS-CoV-2 has become a world health concern leading to severe respiratory tract infections in humans. Virus transmission occurs through person-to-person contact, respiratory droplets, and contaminated hands or surfaces. Accordingly, we aim at reviewing the literature on all information available about the persistence of coronaviruses, including human and animal coronaviruses, on inanimate surfaces and inactivation strategies with biocides employed for chemical and physical disinfection. Method A comprehensive search was systematically conducted in main databases from 1998 to 2020 to identify various viral disinfectants associated with HCoV and methods for control and prevention of this newly emerged virus. Results The analysis of 62 studies shows that human coronaviruses such as severe acute respiratory syndrome (SARS) coronavirus, Middle East respiratory syndrome (MERS) coronavirus or endemic human coronaviruses (HCoV), canine coronavirus (CCV), transmissible gastroenteritis virus (TGEV), and mouse hepatitis virus (MHV) can be efficiently inactivated by physical and chemical disinfectants at different concentrations (70, 80, 85, and 95%) of 2-propanol (70 and 80%) in less than or equal to 60 s and 0.5% hydrogen peroxide or 0.1% sodium hypochlorite within 1 minute. Additionally, glutaraldehyde (0.5–2%), formaldehyde (0.7–1%), and povidone-iodine (0.1–0.75%) could readily inactivate coronaviruses. Moreover, dry heat at 56°C, ultraviolet light dose of 0.2 to 140 J/cm2, and gamma irradiation could effectively inactivate coronavirus. The WHO recommends the use of 0.1% sodium hypochlorite solution or an ethanol-based disinfectant with an ethanol concentration between 62% and 71%. Conclusion The results of the present study can help researchers, policymakers, health decision makers, and people perceive and take the correct measures to control and prevent further transmission of COVID-19. Prevention and decontamination will be the main ways to stop the ongoing outbreak of COVID-19.
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Nichols GL, Gillingham EL, Macintyre HL, Vardoulakis S, Hajat S, Sarran CE, Amankwaah D, Phalkey R. Coronavirus seasonality, respiratory infections and weather. BMC Infect Dis 2021; 21:1101. [PMID: 34702177 PMCID: PMC8547307 DOI: 10.1186/s12879-021-06785-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Accepted: 10/12/2021] [Indexed: 12/23/2022] Open
Abstract
Background The survival of coronaviruses are influenced by weather conditions and seasonal coronaviruses are more common in winter months. We examine the seasonality of respiratory infections in England and Wales and the associations between weather parameters and seasonal coronavirus cases. Methods Respiratory virus disease data for England and Wales between 1989 and 2019 was extracted from the Second-Generation Surveillance System (SGSS) database used for routine surveillance. Seasonal coronaviruses from 2012 to 2019 were compared to daily average weather parameters for the period before the patient’s specimen date with a range of lag periods. Results The seasonal distribution of 985,524 viral infections in England and Wales (1989–2019) showed coronavirus infections had a similar seasonal distribution to influenza A and bocavirus, with a winter peak between weeks 2 to 8. Ninety percent of infections occurred where the daily mean ambient temperatures were below 10 °C; where daily average global radiation exceeded 500 kJ/m2/h; where sunshine was less than 5 h per day; or where relative humidity was above 80%. Coronavirus infections were significantly more common where daily average global radiation was under 300 kJ/m2/h (OR 4.3; CI 3.9–4.6; p < 0.001); where average relative humidity was over 84% (OR 1.9; CI 3.9–4.6; p < 0.001); where average air temperature was below 10 °C (OR 6.7; CI 6.1–7.3; p < 0.001) or where sunshine was below 4 h (OR 2.4; CI 2.2–2.6; p < 0.001) when compared to the distribution of weather values for the same time period. Seasonal coronavirus infections in children under 3 years old were more frequent at the start of an annual epidemic than at the end, suggesting that the size of the susceptible child population may be important in the annual cycle. Conclusions The dynamics of seasonal coronaviruses reflect immunological, weather, social and travel drivers of infection. Evidence from studies on different coronaviruses suggest that low temperature and low radiation/sunlight favour survival. This implies a seasonal increase in SARS-CoV-2 may occur in the UK and countries with a similar climate as a result of an increase in the R0 associated with reduced temperatures and solar radiation. Increased measures to reduce transmission will need to be introduced in winter months for COVID-19. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-021-06785-2.
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Affiliation(s)
- G L Nichols
- Climate Change and Health Group, Centre for Radiation Chemicals and Environmental Hazards, UK Health Security Agency (Formerly Public Health England), Chilton, Oxon, OX11 0RQ, UK. .,European Centre for Environment and Human Health, University of Exeter Medical School, C/O Knowledge Spa RCHT, Truro, Cornwall, TR1 3HD, UK. .,School of Environmental Sciences, UEA, Norwich, NR4 7TJ, UK.
| | - E L Gillingham
- Climate Change and Health Group, Centre for Radiation Chemicals and Environmental Hazards, UK Health Security Agency (Formerly Public Health England), Chilton, Oxon, OX11 0RQ, UK
| | - H L Macintyre
- Climate Change and Health Group, Centre for Radiation Chemicals and Environmental Hazards, UK Health Security Agency (Formerly Public Health England), Chilton, Oxon, OX11 0RQ, UK.,School of Geography Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, UK
| | - S Vardoulakis
- European Centre for Environment and Human Health, University of Exeter Medical School, C/O Knowledge Spa RCHT, Truro, Cornwall, TR1 3HD, UK.,National Centre for Epidemiology and Population Health, Research School of Population Health, Australian National University, Canberra, ACT, 2601, Australia
| | - S Hajat
- Centre on Climate Change and Planetary Health, London School of Hygiene and Tropical Medicine, London, UK
| | - C E Sarran
- Met Office, Fitzroy Road, Exeter, EX1 3PB, UK.,Institute of Health Research, University of Exeter, Saint Luke's Campus, Heavitree Road, Exeter, EX1 2LU, UK
| | - D Amankwaah
- Climate Change and Health Group, Centre for Radiation Chemicals and Environmental Hazards, UK Health Security Agency (Formerly Public Health England), Chilton, Oxon, OX11 0RQ, UK
| | - R Phalkey
- Climate Change and Health Group, Centre for Radiation Chemicals and Environmental Hazards, UK Health Security Agency (Formerly Public Health England), Chilton, Oxon, OX11 0RQ, UK.,Heidelberg Institute of Global Health, University of Heidelberg, Heidelberg, Germany.,Division of Epidemiology and Public Health, University of Nottingham, Nottingham, UK
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13
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Ruetalo N, Businger R, Schindler M. Rapid, dose-dependent and efficient inactivation of surface dried SARS-CoV-2 by 254 nm UV-C irradiation. ACTA ACUST UNITED AC 2021; 26. [PMID: 34676820 PMCID: PMC8532508 DOI: 10.2807/1560-7917.es.2021.26.42.2001718] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Background: The COVID-19 pandemic urges for cheap, reliable, and rapid technologies for disinfection and decontamination. One frequently proposed method is ultraviolet (UV)-C irradiation. UV-C doses necessary to achieve inactivation of high-titre SARS-CoV-2 are poorly defined. Aim: We investigated whether short exposure of SARS-CoV-2 to UV-C irradiation sufficiently reduces viral infectivity and doses necessary to achieve an at least 6-log reduction in viral titres. Methods: Using a box and two handheld systems designed to decontaminate objects and surfaces, we evaluated the efficacy of 254 nm UV-C treatment to inactivate surface dried high-titre SARS-CoV-2. Results: Drying for 2 hours did not have a major impact on the infectivity of SARS-CoV-2, indicating that exhaled virus in droplets or aerosols stays infectious on surfaces for at least a certain amount of time. Short exposure of high titre surface dried virus (3–5*10^6 IU/ml) with UV-C light (16 mJ/cm2) resulted in a total inactivation of SARS-CoV-2. Dose-dependency experiments revealed that 3.5 mJ/cm2 were still effective to achieve a > 6-log reduction in viral titres, whereas 1.75 mJ/cm2 lowered infectivity only by one order of magnitude. Conclusions: SARS-CoV-2 is rapidly inactivated by relatively low doses of UV-C irradiation and the relationship between UV-C dose and log-viral titre reduction of surface residing SARS-CoV-2 is nonlinear. Our findings emphasize that it is necessary to assure sufficient and complete exposure of all relevant areas by integrated UV-C doses of at least 3.5 mJ/cm2 at 254 nm. Altogether, UV-C treatment is an effective non-chemical option to decontaminate surfaces from high-titre infectious SARS-CoV-2.
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Affiliation(s)
- Natalia Ruetalo
- Institute for Medical Virology and Epidemiology of Viral Diseases, University Hospital Tübingen, Tübingen, Germany
| | - Ramona Businger
- Institute for Medical Virology and Epidemiology of Viral Diseases, University Hospital Tübingen, Tübingen, Germany
| | - Michael Schindler
- Institute for Medical Virology and Epidemiology of Viral Diseases, University Hospital Tübingen, Tübingen, Germany
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14
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Bhardwaj SK, Singh H, Deep A, Khatri M, Bhaumik J, Kim KH, Bhardwaj N. UVC-based photoinactivation as an efficient tool to control the transmission of coronaviruses. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 792:148548. [PMID: 34465056 PMCID: PMC8238411 DOI: 10.1016/j.scitotenv.2021.148548] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/28/2021] [Accepted: 06/15/2021] [Indexed: 05/04/2023]
Abstract
The ongoing COVID-19 pandemic made us re-realize the importance of environmental disinfection and sanitation in indoor areas, hospitals, and clinical rooms. UVC irradiation of high energy and short wavelengths, especially in the 200-290-nm range possesses the great potential for germicidal disinfection. These properties of UVC allow to damage or destruct the nucleic acids (DNA/RNA) in diverse microbes (e.g., bacteria, fungi, and viruses). UVC light can hence be used as a promising tool for prevention and control of their infection or transmission. The present review offers insights into the historical perspective, mode of action, and recent advancements in the application of UVC-based antiviral therapy against coronaviruses (including SARS CoV-2). Moreover, the application of UVC lights in the sanitization of healthcare units, public places, medical instruments, respirators, and personal protective equipment (PPE) is also discussed. This article, therefore, is expected to deliver a new path for the developments of UVC-based viricidal approach.
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Affiliation(s)
- Sanjeev K Bhardwaj
- Department of Nanomaterials and Application Technology, Center of Innovative and Applied Bioprocessing, Sector 81 (Knowledge City), S.A.S. Nagar 140306, Punjab, India
| | - Harpreet Singh
- Department of Biotechnology, University Institute of Engineering Technology (UIET), Panjab University, Chandigarh, India
| | - Akash Deep
- Central Scientific Instruments Organisation, Sector 30-C, Chandigarh 160030, India
| | - Madhu Khatri
- Department of Biotechnology, University Institute of Engineering Technology (UIET), Panjab University, Chandigarh, India
| | - Jayeeta Bhaumik
- Department of Nanomaterials and Application Technology, Center of Innovative and Applied Bioprocessing, Sector 81 (Knowledge City), S.A.S. Nagar 140306, Punjab, India
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, Republic of Korea.
| | - Neha Bhardwaj
- Department of Biotechnology, University Institute of Engineering Technology (UIET), Panjab University, Chandigarh, India.
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15
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Standard hospital blanket warming cabinets can be utilized for complete moist heat SARS-CoV2 inactivation of contaminated N95 masks for re-use. Sci Rep 2021; 11:18316. [PMID: 34526550 PMCID: PMC8443586 DOI: 10.1038/s41598-021-97345-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 08/24/2021] [Indexed: 12/23/2022] Open
Abstract
Shortages of personal protective equipment for use during the SARS-CoV-2 pandemic continue to be an issue among health-care workers globally. Extended and repeated use of N95 filtering facepiece respirators without adequate decontamination is of particular concern. Although several methods to decontaminate and re-use these masks have been proposed, logistic or practical issues limit adoption of these techniques. In this study, we propose and validate the use of the application of moist heat (70 °C with humidity augmented by an open pan of water) applied by commonly available hospital (blanket) warming cabinets to decontaminate N95 masks. This report shows that a variety of N95 masks can be repeatedly decontaminated of SARS-CoV-2 over 6 h moist heat exposure without compromise of their filtering function as assessed by standard fit and sodium chloride aerosol filtration efficiency testing. This approached can easily adapted to provide point-of-care N95 mask decontamination allowing for increased practical utility of mask recycling in the health care setting.
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16
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Gamble A, Fischer RJ, Morris DH, Yinda CK, Munster VJ, Lloyd-Smith JO. Heat-Treated Virus Inactivation Rate Depends Strongly on Treatment Procedure: Illustration with SARS-CoV-2. Appl Environ Microbiol 2021; 87:e0031421. [PMID: 34288702 PMCID: PMC8432576 DOI: 10.1128/aem.00314-21] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 07/12/2021] [Indexed: 12/05/2022] Open
Abstract
Decontamination helps limit environmental transmission of infectious agents. It is required for the safe reuse of contaminated medical, laboratory, and personal protective equipment, and for the safe handling of biological samples. Heat treatment is a common decontamination method, notably used for viruses. We show that for liquid specimens (here, solution of SARS-CoV-2 in cell culture medium), the virus inactivation rate under heat treatment at 70°C can vary by almost two orders of magnitude depending on the treatment procedure, from a half-life of 0.86 min (95% credible interval [CI] 0.09, 1.77) in closed vials in a heat block to 37.04 min (95% CI 12.64, 869.82) in uncovered plates in a dry oven. These findings suggest a critical role of evaporation in virus inactivation via dry heat. Placing samples in open or uncovered containers may dramatically reduce the speed and efficacy of heat treatment for virus inactivation. Given these findings, we reviewed the literature on temperature-dependent coronavirus stability and found that specimen container types, along with whether they are closed, covered, or uncovered, are rarely reported in the scientific literature. Heat-treatment procedures must be fully specified when reporting experimental studies to facilitate result interpretation and reproducibility, and must be carefully considered when developing decontamination guidelines. IMPORTANCE Heat is a powerful weapon against most infectious agents. It is widely used for decontamination of medical, laboratory, and personal protective equipment, and for biological samples. There are many methods of heat treatment, and methodological details can affect speed and efficacy of decontamination. We applied four different heat-treatment procedures to liquid specimens containing SARS-CoV-2. Our results show that the container used to store specimens during decontamination can substantially affect inactivation rate; for a given initial level of contamination, decontamination time can vary from a few minutes in closed vials to several hours in uncovered plates. Reviewing the literature, we found that container choices and heat treatment methods are only rarely reported explicitly in methods sections. Our study shows that careful consideration of heat-treatment procedure-in particular the choice of specimen container and whether it is covered-can make results more consistent across studies, improve decontamination practice, and provide insight into the mechanisms of virus inactivation.
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Affiliation(s)
- Amandine Gamble
- Department of Ecology & Evolutionary Biology, University of California, Los Angeles, California, USA
| | - Robert J. Fischer
- Laboratory of Virology, National Institute of Allergy and Infectious Diseases, Hamilton, Montana, USA
| | - Dylan H. Morris
- Department of Ecology & Evolutionary Biology, Princeton University, New Jersey, USA
| | - Claude Kwe Yinda
- Laboratory of Virology, National Institute of Allergy and Infectious Diseases, Hamilton, Montana, USA
| | - Vincent J. Munster
- Laboratory of Virology, National Institute of Allergy and Infectious Diseases, Hamilton, Montana, USA
| | - James O. Lloyd-Smith
- Department of Ecology & Evolutionary Biology, University of California, Los Angeles, California, USA
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17
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Buonerba A, Corpuz MVA, Ballesteros F, Choo KH, Hasan SW, Korshin GV, Belgiorno V, Barceló D, Naddeo V. Coronavirus in water media: Analysis, fate, disinfection and epidemiological applications. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125580. [PMID: 33735767 PMCID: PMC7932854 DOI: 10.1016/j.jhazmat.2021.125580] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 03/02/2021] [Accepted: 03/02/2021] [Indexed: 05/03/2023]
Abstract
Considerable attention has been recently given to possible transmission of SARS-CoV-2 via water media. This review addresses this issue and examines the fate of coronaviruses (CoVs) in water systems, with particular attention to the recently available information on the novel SARS-CoV-2. The methods for the determination of viable virus particles and quantification of CoVs and, in particular, of SARS-CoV-2 in water and wastewater are discussed with particular regard to the methods of concentration and to the emerging methods of detection. The analysis of the environmental stability of CoVs, with particular regard of SARS-CoV-2, and the efficacy of the disinfection methods are extensively reviewed as well. This information provides a broad view of the state-of-the-art for researchers involved in the investigation of CoVs in aquatic systems, and poses the basis for further analyses and discussions on the risk associated to the presence of SARS-CoV-2 in water media. The examined data indicates that detection of the virus in wastewater and natural water bodies provides a potentially powerful tool for quantitative microbiological risk assessment (QMRA) and for wastewater-based epidemiology (WBE) for the evaluation of the level of circulation of the virus in a population. Assays of the viable virions in water media provide information on the integrity, capability of replication (in suitable host species) and on the potential infectivity. Challenges and critical issues relevant to the detection of coronaviruses in different water matrixes with both direct and surrogate methods as well as in the implementation of epidemiological tools are presented and critically discussed.
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Affiliation(s)
- Antonio Buonerba
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II, Fisciano, SA, Italy; Inter-University Centre for Prediction and Prevention of Relevant Hazards (Centro Universitario per la Previsione e Prevenzione Grandi Rischi, C.U.G.RI.), Via Giovanni Paolo II, Fisciano, SA, Italy
| | - Mary Vermi Aizza Corpuz
- Environmental Engineering Program, National Graduate School of Engineering, University of the Philippines, 1101 Diliman, Quezon City, Philippines
| | - Florencio Ballesteros
- Environmental Engineering Program, National Graduate School of Engineering, University of the Philippines, 1101 Diliman, Quezon City, Philippines
| | - Kwang-Ho Choo
- Department of Environmental Engineering, Kyungpook National University (KNU), 80 Daehak-ro, Bukgu, Daegu 41566, Republic of Korea
| | - Shadi W Hasan
- Center for Membranes and Advanced Water Technology (CMAT), Department of Chemical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Gregory V Korshin
- Department of Civil and Environmental Engineering, University of Washington, Box 352700, Seattle, WA 98105-2700, United States
| | - Vincenzo Belgiorno
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II, Fisciano, SA, Italy
| | - Damià Barceló
- Catalan Institute for Water Research (ICR-CERCA), H2O Building, Scientific and Technological Park of the University of Girona, Emili Grahit 101, 17003 Girona, Spain
| | - Vincenzo Naddeo
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II, Fisciano, SA, Italy.
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18
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Chiappa F, Frascella B, Vigezzi GP, Moro M, Diamanti L, Gentile L, Lago P, Clementi N, Signorelli C, Mancini N, Odone A. The efficacy of ultraviolet light-emitting technology against coronaviruses: a systematic review. J Hosp Infect 2021; 114:63-78. [PMID: 34029626 PMCID: PMC8139389 DOI: 10.1016/j.jhin.2021.05.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/11/2021] [Accepted: 05/13/2021] [Indexed: 12/13/2022]
Abstract
The ongoing pandemic of COVID-19 has underlined the importance of adopting effective infection prevention and control (IPC) measures in hospital and community settings. Ultraviolet (UV)-based technologies represent promising IPC tools: their effective application for sanitation has been extensively evaluated in the past but scant, heterogeneous and inconclusive evidence is available on their effect on SARS-CoV-2 transmission. With the aim of pooling the available evidence on the efficacy of UV technologies against coronaviruses, we conducted a systematic review following PRISMA guidelines, searching Medline, Embase and the Cochrane Library, and the main clinical trials' registries (WHO ICTRP, ClinicalTrials.gov, Cochrane and EU Clinical Trial Register). Quantitative data on studies' interventions were summarized in tables, pooled by different coronavirus species and strain, UV source, characteristics of UV light exposure and outcomes. Eighteen papers met our inclusion criteria, published between 1972 and 2020. Six focused on SARS-CoV-2, four on SARS-CoV-1, one on MERS-CoV, three on seasonal coronaviruses, and four on animal coronaviruses. All were experimental studies. Overall, despite wide heterogenicity within included studies, complete inactivation of coronaviruses on surfaces or aerosolized, including SARS-CoV-2, was reported to take a maximum exposure time of 15 min and to need a maximum distance from the UV emitter of up to 1 m. Advances in UV-based technologies in the field of sanitation and their proved high virucidal potential against SARS-CoV-2 support their use for IPC in hospital and community settings and their contribution towards ending the COVID-19 pandemic. National and international guidelines are to be updated and parameters and conditions of use need to be identified to ensure both efficacy and safety of UV technology application for effective infection prevention and control in both healthcare and non-healthcare settings.
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Affiliation(s)
- F Chiappa
- School of Public Health, University Vita-Salute San Raffaele, Milan, Italy
| | - B Frascella
- School of Public Health, University Vita-Salute San Raffaele, Milan, Italy
| | - G P Vigezzi
- School of Public Health, University Vita-Salute San Raffaele, Milan, Italy
| | - M Moro
- Infection Control Committee, IRCCS San Raffaele Hospital, Milan, Italy
| | - L Diamanti
- Clinical Engineering Unit, IRCCS San Raffaele Hospital, Milan, Italy; HTA Committee, IRCCS San Raffaele Hospital, Milan, Italy
| | - L Gentile
- Clinical Engineering Unit, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - P Lago
- Clinical Engineering Unit, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - N Clementi
- Laboratory of Microbiology and Virology, University Vita-Salute San Raffaele, Milan, Italy
| | - C Signorelli
- School of Medicine, University Vita-Salute San Raffaele, Milan, Italy
| | - N Mancini
- Laboratory of Microbiology and Virology, University Vita-Salute San Raffaele, Milan, Italy
| | - A Odone
- HTA Committee, IRCCS San Raffaele Hospital, Milan, Italy; Department of Public Health, Experimental and Forensic Medicine, University of Pavia, Pavia, Italy.
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19
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Wiktorczyk-Kapischke N, Grudlewska-Buda K, Wałecka-Zacharska E, Kwiecińska-Piróg J, Radtke L, Gospodarek-Komkowska E, Skowron K. SARS-CoV-2 in the environment-Non-droplet spreading routes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 770:145260. [PMID: 33513500 PMCID: PMC7825822 DOI: 10.1016/j.scitotenv.2021.145260] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 04/15/2023]
Abstract
The new coronavirus SARS-CoV-2, first identified in Wuhan (China) in December 2019, represents the same family as the Serve Acute Respiratory Syndrome Coronavirus-1 (SARS-CoV-1). These viruses spread mainly via the droplet route. However, during the pandemic of COVID-19 other reservoirs, i.e., water (surface and ground), sewage, garbage, or soil, should be considered. As the infectious SARS-CoV-2 particles are also present in human excretions, such a non-droplet transmission is also possible. A significant problem is the presence of SARS-CoV-2 in the hospital environment, including patients' rooms, medical equipment, everyday objects and the air. Relevant is selecting the type of equipment in the COVID-19 hospital wards on which the virus particles persist the shortest or do not remain infectious. Elimination of plastic objects/equipment from the environment of the infected person seems to be of great importance. It is particularly relevant in water reservoirs contaminated with raw discharges. Wastewater may contain coronaviruses and therefore there is a need for expanding Water-Based Epidemiology (WBE) studies to use obtained values as tool in determination of the actual percentage of the SARS-CoV-2 infected population in an area. It is of great importance to evaluate the available disinfection methods to control the spread of SARS-CoV-2 in the environment. Exposure of SARS-CoV-2 to 65-70% ethanol, 0.5% hydrogen peroxide, or 0.1% sodium hypochlorite has effectively eliminated the virus from the surfaces. Since there are many unanswered questions about the transmission of SARS-CoV-2, the research on this topic is still ongoing. This review aims to summarize current knowledge on the SARS-CoV-2 transmission and elucidate the viral survival in the environment, with particular emphasis on the possibility of non-droplet transmission.
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Affiliation(s)
- Natalia Wiktorczyk-Kapischke
- Department of Microbiology, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz, Poland
| | - Katarzyna Grudlewska-Buda
- Department of Microbiology, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz, Poland
| | - Ewa Wałecka-Zacharska
- Department of Food Hygiene and Consumer Health, Wrocław University of Environmental and Life Sciences, 31 C.K. Norwida St., 50-375 Wrocław, Poland
| | - Joanna Kwiecińska-Piróg
- Department of Microbiology, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz, Poland
| | - Laura Radtke
- Faculty of Civil and Environmental Engineering and Architecture, UTP University of Science and Technology in Bydgoszcz, Al. prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland
| | - Eugenia Gospodarek-Komkowska
- Department of Microbiology, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz, Poland
| | - Krzysztof Skowron
- Department of Microbiology, Nicolaus Copernicus University in Toruń, Collegium Medicum of L. Rydygier in Bydgoszcz, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz, Poland.
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20
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Bedrosian N, Mitchell E, Rohm E, Rothe M, Kelly C, String G, Lantagne D. A Systematic Review of Surface Contamination, Stability, and Disinfection Data on SARS-CoV-2 (Through July 10, 2020). ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:4162-4173. [PMID: 33227206 DOI: 10.1021/acs.est.0c05651] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We conducted a systematic review of hygiene intervention effectiveness against SARS-CoV-2, including developing inclusion criteria, conducting the search, selecting articles for inclusion, and summarizing included articles. Overall, 96 268 articles were screened and 78 articles met inclusion criteria with outcomes in surface contamination, stability, and disinfection. Surface contamination was assessed on 3343 surfaces using presence/absence methods. Laboratories had the highest percent positive surfaces (21%, n = 83), followed by patient-room healthcare facility surfaces (17%, n = 1170), non-COVID-patient-room healthcare facility surfaces (12%, n = 1429), and household surfaces (3%, n = 161). Surface stability was assessed using infectivity, SARS-CoV-2 survived on stainless steel, plastic, and nitrile for half-life 2.3-17.9 h. Half-life decreased with temperature and humidity increases, and was unvaried by surface type. Ten surface disinfection tests with SARS-CoV-2, and 15 tests with surrogates, indicated sunlight, ultraviolet light, ethanol, hydrogen peroxide, and hypochlorite attain 99.9% reduction. Overall there was (1) an inability to align SARS-CoV-2 contaminated surfaces with survivability data and effective surface disinfection methods for these surfaces; (2) a knowledge gap on fomite contribution to SARS-COV-2 transmission; (3) a need for testing method standardization to ensure data comparability; and (4) a need for research on hygiene interventions besides surfaces, particularly handwashing, to continue developing recommendations for interrupting SARS-CoV-2 transmission.
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Affiliation(s)
- Noah Bedrosian
- Tufts University School of Engineering, Medford, Massachusetts, 02155, United States
| | - Elizabeth Mitchell
- Tufts University School of Engineering, Medford, Massachusetts, 02155, United States
| | - Elsa Rohm
- Tufts University School of Engineering, Medford, Massachusetts, 02155, United States
| | - Miguel Rothe
- Tufts University School of Engineering, Medford, Massachusetts, 02155, United States
| | - Christine Kelly
- Tufts University School of Engineering, Medford, Massachusetts, 02155, United States
| | - Gabrielle String
- Tufts University School of Engineering, Medford, Massachusetts, 02155, United States
| | - Daniele Lantagne
- Tufts University School of Engineering, Medford, Massachusetts, 02155, United States
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21
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Achak M, Alaoui Bakri S, Chhiti Y, M'hamdi Alaoui FE, Barka N, Boumya W. SARS-CoV-2 in hospital wastewater during outbreak of COVID-19: A review on detection, survival and disinfection technologies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 761:143192. [PMID: 33153744 PMCID: PMC7585361 DOI: 10.1016/j.scitotenv.2020.143192] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 10/18/2020] [Indexed: 05/17/2023]
Abstract
Currently, the apparition of new SARS-CoV, known as SARS-CoV-2, affected more than 34 million people and causing high death rates worldwide. Recently, several studies reported SARS-CoV-2 ribonucleic acid (RNA) in hospital wastewater. SARS-CoV-2 can be transmitted between humans via respiratory droplets, close contact and fomites. Fecal-oral transmission is considered also as a potential route of transmission since several scientists confirmed the presence of SARS-CoV-2 RNA in feces of infected patients, therefore its transmission via feces in aquatic environment, particularly hospital wastewater. Hospitals are one of the important classes of polluting sectors around the world. It was identified that hospital wastewater contains hazardous elements and a wide variety of microbial pathogens and viruses. Therefore, this may potentially pose a significant risk of public health and environment infection. This study reported an introduction about the Physical-chemical and microbiological characterization of hospital wastewater, which can be a route to identify potential technology to reduce the impact of hospital contaminants before evacuation. The presence of SARS-CoV-2 in aqueous environment was reviewed. The knowledge of the detection and survival of SARS-CoV-2 in wastewater and hospital wastewater were described to understand the different routes of SARS-CoV-2 transmission, which is also useful to avoid the outbreak of CoV-19. In addition, disinfection technologies used commonly for deactivation of SARS-CoV-2 were highlighted. It was revealed that, chlorine-containing disinfectants are the most commonly used disinfectants in this field of research. Meanwhile, other efficient technologies must be developed and improved to avoid another wave of the pandemic of COVID-19 infections.
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Affiliation(s)
- Mounia Achak
- Science Engineer Laboratory for Energy, National School of Applied Sciences, Chouaïb Doukkali University, El Jadida, Morocco; Chemical & Biochemical Sciences, Green Process Engineering, CBS, Mohammed VI Polytechnic University, Ben Guerir, Morocco.
| | - Soufiane Alaoui Bakri
- Science Engineer Laboratory for Energy, National School of Applied Sciences, Chouaïb Doukkali University, El Jadida, Morocco
| | - Younes Chhiti
- Advanced Materials and Process Engineering Laboratory, National School of Chemistry, Ibn Tofail University, Kenitra, Morocco; Mohamed VI Polytechnic University, Ben Guerir, Morocco
| | - Fatima Ezzahrae M'hamdi Alaoui
- Science Engineer Laboratory for Energy, National School of Applied Sciences, Chouaïb Doukkali University, El Jadida, Morocco
| | - Noureddine Barka
- Sultan Moulay Slimane University of Beni Mellal, Research Group in Environmental Sciences and Applied Materials (SEMA), FP Khouribga, Khouribga, Morocco
| | - Wafaa Boumya
- Science Engineer Laboratory for Energy, National School of Applied Sciences, Chouaïb Doukkali University, El Jadida, Morocco; Sultan Moulay Slimane University of Beni Mellal, Research Group in Environmental Sciences and Applied Materials (SEMA), FP Khouribga, Khouribga, Morocco
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22
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Castaño N, Cordts SC, Kurosu Jalil M, Zhang KS, Koppaka S, Bick AD, Paul R, Tang SKY. Fomite Transmission, Physicochemical Origin of Virus-Surface Interactions, and Disinfection Strategies for Enveloped Viruses with Applications to SARS-CoV-2. ACS OMEGA 2021; 6:6509-6527. [PMID: 33748563 PMCID: PMC7944398 DOI: 10.1021/acsomega.0c06335] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 02/19/2021] [Indexed: 05/07/2023]
Abstract
Inanimate objects or surfaces contaminated with infectious agents, referred to as fomites, play an important role in the spread of viruses, including SARS-CoV-2, the virus responsible for the COVID-19 pandemic. The long persistence of viruses (hours to days) on surfaces calls for an urgent need for effective surface disinfection strategies to intercept virus transmission and the spread of diseases. Elucidating the physicochemical processes and surface science underlying the adsorption and transfer of virus between surfaces, as well as their inactivation, is important for understanding how diseases are transmitted and for developing effective intervention strategies. This review summarizes the current knowledge and underlying physicochemical processes of virus transmission, in particular via fomites, and common disinfection approaches. Gaps in knowledge and the areas in need of further research are also identified. The review focuses on SARS-CoV-2, but discussion of related viruses is included to provide a more comprehensive review given that much remains unknown about SARS-CoV-2. Our aim is that this review will provide a broad survey of the issues involved in fomite transmission and intervention to a wide range of readers to better enable them to take on the open research challenges.
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Affiliation(s)
- Nicolas Castaño
- Department
of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Seth C. Cordts
- Department
of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Myra Kurosu Jalil
- Department
of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Kevin S. Zhang
- Department
of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Saisneha Koppaka
- Department
of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Alison D. Bick
- Department
of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Rajorshi Paul
- Department
of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
| | - Sindy K. Y. Tang
- Department
of Mechanical Engineering, Stanford University, Stanford, California 94305, United States
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23
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Hamouda M, Mustafa F, Maraqa M, Rizvi T, Aly Hassan A. Wastewater surveillance for SARS-CoV-2: Lessons learnt from recent studies to define future applications. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 759:143493. [PMID: 33190883 PMCID: PMC7648500 DOI: 10.1016/j.scitotenv.2020.143493] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 10/15/2020] [Accepted: 10/17/2020] [Indexed: 05/02/2023]
Abstract
Wastewater-based epidemiology (WBE) is successful in the detection of the spread of SARS-CoV-2. This review examines the methods used and results of recent studies on the quantification of SARS-CoV-2 in wastewater. WBE becomes essential, especially with virus transmission path uncertainty, limitations on the number of clinical tests that could be conducted, and a relatively long period for infected people to show symptoms. Wastewater surveillance was used to show the effect of lockdown on the virus spread. A WBE framework tailored for SARS-CoV-2 that incorporates lessons learnt from the reviewed studies was developed. Results of the review helped outline challenges facing the detection of SARS-CoV-2 in wastewater samples. A comparison between the various studies with regards to sample concentration and virus quantification was conducted. Five different primers sets were used for qPCR quantification; however, due to limited data availability, there is no consensus on the most sensitive primer. Correlating the slope of the relationship between the number of gene copies vs. the cumulative number of infections normalized to the total population served with the average new cases, suggests that qPCR results could help estimating the number of new infections. The correlation is improved when a lag period was introduced to account for asymptomatic infections. Based on lessons learnt from recent studies, it is recommended that future applications should consider the following: 1) ensuring occupational safety in managing sewage collection and processing, 2) evaluating the effectiveness of greywater disinfection, 3) measuring viral RNA decay due to biological and chemical activities during collection and treatment, 4) assessing the effectiveness of digital PCR, and 5) conducting large scale international studies that follow standardized protocols.
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Affiliation(s)
- Mohamed Hamouda
- Civil and Environmental Engineering and the National Water Center, United Arab Emirates University, P.O. Box 15551, Al Ain, Abu Dhabi, United Arab Emirates.
| | - Farah Mustafa
- Department of Biochemistry, College of Medicine & Health Sciences, United Arab Emirates University, P.O. Box 17666, Al Ain, Abu Dhabi, United Arab Emirates.
| | - Munjed Maraqa
- Civil and Environmental Engineering and the National Water Center, United Arab Emirates University, P.O. Box 15551, Al Ain, Abu Dhabi, United Arab Emirates.
| | - Tahir Rizvi
- Department of Microbiology & Immunology, College of Medicine & Health Sciences, United Arab Emirates University, P.O. Box 17666, Al Ain, Abu Dhabi, United Arab Emirates.
| | - Ashraf Aly Hassan
- Civil and Environmental Engineering and the National Water Center, United Arab Emirates University, P.O. Box 15551, Al Ain, Abu Dhabi, United Arab Emirates; Civil and Environmental Engineering, University of Nebraska Lincoln, 900 N 16th St., Lincoln, NE 68588-0531, USA.
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24
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Kumar M, Mazumder P, Mohapatra S, Kumar Thakur A, Dhangar K, Taki K, Mukherjee S, Kumar Patel A, Bhattacharya P, Mohapatra P, Rinklebe J, Kitajima M, Hai FI, Khursheed A, Furumai H, Sonne C, Kuroda K. A chronicle of SARS-CoV-2: Seasonality, environmental fate, transport, inactivation, and antiviral drug resistance. JOURNAL OF HAZARDOUS MATERIALS 2021; 405:124043. [PMID: 33268203 PMCID: PMC7536132 DOI: 10.1016/j.jhazmat.2020.124043] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 09/11/2020] [Accepted: 09/17/2020] [Indexed: 05/08/2023]
Abstract
In this review, we present the environmental perspectives of the viruses and antiviral drugs related to SARS-CoV-2. The present review paper discusses occurrence, fate, transport, susceptibility, and inactivation mechanisms of viruses in the environment as well as environmental occurrence and fate of antiviral drugs, and prospects (prevalence and occurrence) of antiviral drug resistance (both antiviral drug resistant viruses and antiviral resistance in the human). During winter, the number of viral disease cases and environmental occurrence of antiviral drug surge due to various biotic and abiotic factors such as transmission pathways, human behaviour, susceptibility, and immunity as well as cold climatic conditions. Adsorption and persistence critically determine the fate and transport of viruses in the environment. Inactivation and disinfection of virus include UV, alcohol, and other chemical-base methods but the susceptibility of virus against these methods varies. Wastewater treatment plants (WWTPs) are major reserviors of antiviral drugs and their metabolites and transformation products. Ecotoxicity of antiviral drug residues against aquatic organisms have been reported, however more threatening is the development of antiviral resistance, both in humans and in wild animal reservoirs. In particular, emergence of antiviral drug-resistant viruses via exposure of wild animals to high loads of antiviral residues during the current pandemic needs further evaluation.
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Affiliation(s)
- Manish Kumar
- Discipline of Earth Science, Indian Institute of Technology Gandhinagar, Gujarat 382 355, India.
| | - Payal Mazumder
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Sanjeeb Mohapatra
- Environmnetal Science and Engineering Department, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Alok Kumar Thakur
- Discipline of Earth Science, Indian Institute of Technology Gandhinagar, Gujarat 382 355, India
| | - Kiran Dhangar
- Discipline of Earth Science, Indian Institute of Technology Gandhinagar, Gujarat 382 355, India
| | - Kaling Taki
- Discipline of Civil Engineering, Indian Institute of Technology Gandhinagar, Gujarat 382 355, India
| | - Santanu Mukherjee
- Discipline of Earth Science, Indian Institute of Technology Gandhinagar, Gujarat 382 355, India
| | - Arbind Kumar Patel
- Discipline of Earth Science, Indian Institute of Technology Gandhinagar, Gujarat 382 355, India
| | - Prosun Bhattacharya
- Department of Sustainable Development, Environmental Science and Engineering, KTH Royal Institute of Technology, Teknikringen 10B, SE-10044 Stockholm, Sweden
| | - Pranab Mohapatra
- Discipline of Civil Engineering, Indian Institute of Technology Gandhinagar, Gujarat 382 355, India
| | - Jörg Rinklebe
- Laboratory of Soil- and Groundwater-Management, School of Architecture and Civil Engineering, University of Wuppertal, Wuppertal 42285, Germany; Department of Environment, Energy and Geoinformatics, University of Sejong, Seoul, South Korea
| | - Masaaki Kitajima
- Division of Environmental Engineering, Hokkaido University, Hokkaido 060-8628, Japan
| | - Faisal I Hai
- Wollongong, Strategic Water Infrastructure Laboratory, School of Civil, Mining and Environmental Engineering, University of Wollongong, NSW 2522, Australia
| | - Anwar Khursheed
- Department of Civil Engineering, King Saud University, Riyadh, Saudi Arabia
| | - Hiroaki Furumai
- Research Centre for Water Environment Technology, Graduate School of Engineering, The University of Tokyo, Tokyo 113-8656, Japan
| | - Christian Sonne
- Department of Bioscience, Aarhus University, Frederiksborgvej 399, PO Box 358, DK-4000 Roskilde, Denmark
| | - Keisuke Kuroda
- Department of Environmental and Civil Engineering, Toyama Prefectural University, Toyama 9390398, Japan
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25
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Ghafoor D, Khan Z, Khan A, Ualiyeva D, Zaman N. Excessive use of disinfectants against COVID-19 posing a potential threat to living beings. Curr Res Toxicol 2021; 2:159-168. [PMID: 33688633 PMCID: PMC7931675 DOI: 10.1016/j.crtox.2021.02.008] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/08/2021] [Accepted: 02/26/2021] [Indexed: 02/07/2023] Open
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in Wuhan city of China in late December 2019. The rapid spread of the COVID-19 across the communities shock the entire population, because of no existing therapies. Health professionals recommended frequent washing of hands with soap and alcohol-based sanitizers, but these disinfectants has worst effects on human health. Precautionary measures should be ensured to protect ourselves and the community from the possible risk associated with disinfectants.
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in Wuhan city of China in late December 2019 and identified as a novel coronavirus disease 2019 (COVID-19). On January 30, the World Health Organization (WHO) declared the coronavirus outbreak a global public health emergency. The rapid spread of the pathogen across the communities shock the entire population. As no existing therapy were available during the pandemic. Health professionals recommended frequent washing of hands with soap and alcohol-based sanitizers. Disinfectants were extensively sprayed to minimize the possibility of getting COVID-19. Despite the potential benefits of these germicidal agents against COVID-19. Alcohol-based hand sanitizers lead to dry skin, infection, and alcohol poisoning. Children are considered more prone to alcohol poisoning and other major health concern. Precautionary measures should be ensured to protect the community from the possible risk associated with disinfectants.
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Affiliation(s)
- Dawood Ghafoor
- CAS Key Laboratory of Special Pathogens, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, Hubei, China.,University of Chinese Academy of Sciences, Beijing 100049, China.,Center for Biotechnology and Microbiology, University of Swat, Pakistan
| | - Zafran Khan
- University of Chinese Academy of Sciences, Beijing 100049, China.,State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China.,Center for Biotechnology and Microbiology, University of Swat, Pakistan
| | - Asaf Khan
- Ministry of Education, Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, 730000 Gansu, China
| | - Daniya Ualiyeva
- University of Chinese Academy of Sciences, Beijing 100049, China.,Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Nasib Zaman
- Center for Biotechnology and Microbiology, University of Swat, Pakistan
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26
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Rockey NC, Henderson JB, Chin K, Raskin L, Wigginton KR. Predictive Modeling of Virus Inactivation by UV. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:3322-3332. [PMID: 33576611 DOI: 10.1021/acs.est.0c07814] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
UV254 disinfection strategies are commonly applied to inactivate pathogenic viruses in water, food, air, and on surfaces. There is a need for methods that rapidly predict the kinetics of virus inactivation by UV254, particularly for emerging and difficult-to-culture viruses. We conducted a systematic literature review of inactivation rate constants for a wide range of viruses. Using these data and virus characteristics, we developed and evaluated linear and nonlinear models for predicting inactivation rate constants. Multiple linear regressions performed best for predicting the inactivation kinetics of (+) ssRNA and dsDNA viruses, with cross-validated root mean squared relative prediction errors similar to those associated with experimental rate constants. We tested the models by predicting and measuring inactivation rate constants of a (+) ssRNA mouse coronavirus and a dsDNA marine bacteriophage; the predicted rate constants were within 7% and 71% of the experimental rate constants, respectively, indicating that the prediction was more accurate for the (+) ssRNA virus than the dsDNA virus. Finally, we applied our models to predict the UV254 rate constants of several viruses for which high-quality UV254 inactivation data are not available. Our models will be valuable for predicting inactivation kinetics of emerging or difficult-to-culture viruses.
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Affiliation(s)
- Nicole C Rockey
- Department of Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI 48109, United States
| | - James B Henderson
- Consulting for Statistics, Computing and Analytics Research, University of Michigan, Ann Arbor, MI 48109, United States
| | - Kaitlyn Chin
- Department of Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI 48109, United States
| | - Lutgarde Raskin
- Department of Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI 48109, United States
| | - Krista R Wigginton
- Department of Civil & Environmental Engineering, University of Michigan, Ann Arbor, MI 48109, United States
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27
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Aboubakr HA, Sharafeldin TA, Goyal SM. Stability of SARS-CoV-2 and other coronaviruses in the environment and on common touch surfaces and the influence of climatic conditions: A review. Transbound Emerg Dis 2021. [PMID: 32603505 DOI: 10.1111/tbed.13707-35] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/23/2023]
Abstract
Although the unprecedented efforts the world has been taking to control the spread of the human coronavirus disease (COVID-19) and its causative aetiology [severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)], the number of confirmed cases has been increasing drastically. Therefore, there is an urgent need for devising more efficient preventive measures, to limit the spread of the infection until an effective treatment or vaccine is available. The preventive measures depend mainly on the understanding of the transmission routes of this virus, its environmental stability, and its persistence on common touch surfaces. Due to the very limited knowledge about SARS-CoV-2, we can speculate its stability in the light of previous studies conducted on other human and animal coronaviruses. In this review, we present the available data on the stability of coronaviruses (CoVs), including SARS-CoV-2, from previous reports to help understand its environmental survival. According to available data, possible airborne transmission of SARS-CoV-2 has been suggested. SARS-CoV-2 and other human and animal CoVs have remarkably short persistence on copper, latex and surfaces with low porosity as compared to other surfaces like stainless steel, plastics, glass and highly porous fabrics. It has also been reported that SARS-CoV-2 is associated with diarrhoea and that it is shed in the faeces of COVID-19 patients. Some CoVs show persistence in human excrement, sewage and waters for a few days. These findings suggest a possible risk of faecal-oral, foodborne and waterborne transmission of SARS-CoV-2 in developing countries that often use sewage-polluted waters in irrigation and have poor water treatment systems. CoVs survive longer in the environment at lower temperatures and lower relative humidity. It has been suggested that large numbers of COVID-19 cases are associated with cold and dry climates in temperate regions of the world and that seasonality of the virus spread is suspected.
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Affiliation(s)
- Hamada A Aboubakr
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN, USA
- Department of Food Science and Technology, Faculty of Agriculture, Alexandria University, Alexandria, Egypt
| | - Tamer A Sharafeldin
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN, USA
| | - Sagar M Goyal
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN, USA
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28
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Pedreira A, Taşkın Y, García MR. A Critical Review of Disinfection Processes to Control SARS-CoV-2 Transmission in the Food Industry. Foods 2021; 10:283. [PMID: 33572531 PMCID: PMC7911259 DOI: 10.3390/foods10020283] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 01/12/2023] Open
Abstract
Industries of the food sector have made a great effort to control SARS-CoV-2 indirect transmission, through objects or surfaces, by updating cleaning and disinfection protocols previously focused on inactivating other pathogens, as well as food spoilage microorganisms. The information, although scarce at the beginning of the COVID-19 pandemic, has started to be sufficiently reliable to avoid over-conservative disinfection procedures. This work reviews the literature to propose a holistic view of the disinfection process where the decision variables, such as type and concentration of active substances, are optimised to guarantee the inactivation of SARS-CoV-2 and other usual pathogens and spoilage microorganisms while minimising possible side-effects on the environment and animal and human health.
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Affiliation(s)
- Adrián Pedreira
- Bioprocess Engineering Group, IIM-CSIC, 36208 Vigo, Spain;
- Lab of Recycling and Valorization of Waste Materials (REVAL), IIM-CSIC, 36208 Vigo, Spain
| | - Yeşim Taşkın
- Food Engineering Department, Hacettepe University, Ankara 06800, Turkey;
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29
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The virus removal in UV irradiation, ozonation and chlorination. WATER CYCLE 2021; 2:23-31. [PMCID: PMC8171166 DOI: 10.1016/j.watcyc.2021.05.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/19/2021] [Accepted: 05/23/2021] [Indexed: 05/19/2023]
Abstract
The COVID-19 pandemic draws much attention to virus inactivation since the SARS-CoV-2 was detected in miscellaneous environments and the wastewater can be a potential transmitting pathway. UV irradiation, ozonation and chlorination are widely used disinfection processes in water treatment. In this review, the mechanisms and applications of three disinfection processes are introduced, and their inactivation effects on virus as well as other microorganisms are compared and discussed. The resistance of viruses to UV irradiation is generally stronger than that of bacteria. 4-log inactivation of bacteria can be easily obtained within a UV dose of 10 mJ/cm2. However, the doses to reach the same virus removal rate vary greatly from 10 to 140 mJ/cm2. The coronaviruses have even stronger UV resistance. Comparatively, ozonation and chlorination are effective methods to inactivate viruses, and the CT values of 4-log removal for most viruses concerned are lower than 1 mg·min/L and 10 mg·min/L, respectively. Protozoa, fungal spores and bacterial spores are more resistant to disinfection. Temperature, pH, organic matters, turbidity and other parameters all have influences on the disinfection. With a 10 °C decrease in temperature, the CT value required for certain removal rates doubles. Generally low pH promotes disinfection and high pH is against it. In drinking water and wastewater treatment process, the resistance properties of microorganisms and other influence parameters should be taken into consideration when choosing disinfection technologies.
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30
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Noorimotlagh Z, Mirzaee SA, Jaafarzadeh N, Maleki M, Kalvandi G, Karami C. A systematic review of emerging human coronavirus (SARS-CoV-2) outbreak: focus on disinfection methods, environmental survival, and control and prevention strategies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:1-15. [PMID: 33009614 PMCID: PMC7531810 DOI: 10.1007/s11356-020-11060-z] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 09/29/2020] [Indexed: 04/12/2023]
Abstract
Recently, an outbreak of a novel human coronavirus which is referred to as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) (COVID-19) by the World Health Organization (WHO) was identified in Wuhan, China. To help combat the pandemic, a systematic review (SR) was performed to collect all available studies concerning inactivation methods, environmental survival, and control and prevention strategies. A comprehensive literature survey yielded 42 eligible studies which included in the SR. The results confirmed that the WHO recommended two alcohol-based hand rub formulations (ethanol 70-95% and 2-propanol 70-100%) had an efficient virucidal activity in less than 60 s by more and equal 4 log10 (≥ 99.99) approximately and could be used for disinfection in public health and health-care facilities. The findings indicated that SARS-CoV-1 and SARS-CoV-2 can survive under different environmental conditions between 4 and 72 h approximately. The results also demonstrate that temperature and relative humidity are important factors in the survival of SARS-CoV-2. The main strategies recommended by the WHO to avoid contracting SARS-CoV-2 are hand washing several times in the day and maintaining social distancing with others. It is important to note that the more studies require addressing, the more possible airborne transmission due to the survival of SARS-CoV-2 in aerosols for 3 h approximately. We hope that the results of the present SR can help researchers, health decision-makers, policy-makers, and people for understanding and taking the proper behavior to control and prevent further spread of SARS-CoV-2.
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Affiliation(s)
- Zahra Noorimotlagh
- Zoonotic Diseases Research Center, Ilam University of Medical Sciences, Ilam, Iran
- Department of Environmental Health Engineering, Faculty of Health, Ilam University of Medical Sciences, Ilam, Iran
| | - Seyyed Abbas Mirzaee
- Zoonotic Diseases Research Center, Ilam University of Medical Sciences, Ilam, Iran
- Department of Environmental Health Engineering, Faculty of Health, Ilam University of Medical Sciences, Ilam, Iran
| | - Neemat Jaafarzadeh
- Environmental Technologies Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Maryam Maleki
- Department of Physiology, Faculty of Medicine, Ilam University of Medical Sciences, Ilam, Iran
| | - Gholamreza Kalvandi
- Department of Pediatrics Gastroenterology, School of Medicine, Ilam University of Medical sciences, Ilam, Iran
| | - Chiman Karami
- Department of Microbiology, Parasitology and Immunology, Ardabil University of Medical Sciences, Ardebil, Iran
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31
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Kumar A, Kasloff SB, Leung A, Cutts T, Strong JE, Hills K, Gu FX, Chen P, Vazquez-Grande G, Rush B, Lother S, Malo K, Zarychanski R, Krishnan J. Decontamination of N95 masks for re-use employing 7 widely available sterilization methods. PLoS One 2020; 15:e0243965. [PMID: 33326504 PMCID: PMC7744046 DOI: 10.1371/journal.pone.0243965] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 12/01/2020] [Indexed: 11/19/2022] Open
Abstract
The response to the COVID-19 epidemic is generating severe shortages of personal protective equipment around the world. In particular, the supply of N95 respirator masks has become severely depleted, with supplies having to be rationed and health care workers having to use masks for prolonged periods in many countries. We sought to test the ability of 7 different decontamination methods: autoclave treatment, ethylene oxide gassing (ETO), low temperature hydrogen peroxide gas plasma (LT-HPGP) treatment, vaporous hydrogen peroxide (VHP) exposure, peracetic acid dry fogging (PAF), ultraviolet C irradiation (UVCI) and moist heat (MH) treatment to decontaminate a variety of different N95 masks following experimental contamination with SARS-CoV-2 or vesicular stomatitis virus as a surrogate. In addition, we sought to determine whether masks would tolerate repeated cycles of decontamination while maintaining structural and functional integrity. All methods except for UVCI were effective in total elimination of viable virus from treated masks. We found that all respirator masks tolerated at least one cycle of all treatment modalities without structural or functional deterioration as assessed by fit testing; filtration efficiency testing results were mostly similar except that a single cycle of LT-HPGP was associated with failures in 3 of 6 masks assessed. VHP, PAF, UVCI, and MH were associated with preserved mask integrity to a minimum of 10 cycles by both fit and filtration testing. A similar result was shown with ethylene oxide gassing to the maximum 3 cycles tested. Pleated, layered non-woven fabric N95 masks retained integrity in fit testing for at least 10 cycles of autoclaving but the molded N95 masks failed after 1 cycle; filtration testing however was intact to 5 cycles for all masks. The successful application of autoclaving for layered, pleated masks may be of particular use to institutions globally due to the virtually universal accessibility of autoclaves in health care settings. Given the ability to modify widely available heating cabinets on hospital wards in well-resourced settings, the application of moist heat may allow local processing of N95 masks.
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Affiliation(s)
- Anand Kumar
- Sections of Critical Care Medicine and Infectious Diseases, Departments of Medicine, Medical Microbiology and Pharmacology, University of Manitoba, Winnipeg, Canada
| | - Samantha B. Kasloff
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Canada
| | - Anders Leung
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Canada
| | - Todd Cutts
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Canada
| | - James E. Strong
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Canada
| | - Kevin Hills
- National Centre for Foreign Animal Diseases, Canadian Food Inspection Agency, Winnipeg, Canada
| | | | - Paul Chen
- University of Toronto, Toronto, Canada
| | - Gloria Vazquez-Grande
- Section of Critical Care Medicine, Department of Medicine, University of Manitoba, Winnipeg, Canada
| | - Barret Rush
- Section of Critical Care Medicine, Department of Medicine, University of Manitoba, Winnipeg, Canada
| | - Sylvain Lother
- Section of Critical Care Medicine, Department of Medicine, University of Manitoba, Winnipeg, Canada
| | - Kimberly Malo
- Occupational & Environmental Safety and Health, Winnipeg Regional Health Authority, Winnipeg, Canada
| | - Ryan Zarychanski
- Sections of Critical Care and Hematology, Departments of Medicine and Community Health Sciences, University of Manitoba, Winnipeg, Canada
| | - Jay Krishnan
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Canada
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32
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Duda-Chodak A, Lukasiewicz M, Zięć G, Florkiewicz A, Filipiak-Florkiewicz A. Covid-19 pandemic and food: Present knowledge, risks, consumers fears and safety. Trends Food Sci Technol 2020; 105:145-160. [PMID: 32921922 PMCID: PMC7480472 DOI: 10.1016/j.tifs.2020.08.020] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 08/04/2020] [Accepted: 08/29/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND COVID-19 is a pandemic disease that has paralyzed social life and the economy around the world since the end of 2019, and which has so far killed nearly 600,000 people. The rapidity of its spread and the lack of detailed research on the course and methods of transmission significantly impede both its eradication and prevention. SCOPE AND APPROACH Due to the high transmission rate and fatality resulting from COVID-19 disease, the paper focuses on analyzing the current state of knowledge about SARS-CoV-2 as well as its potential connection with food as a source of pathogen and infection. KEY FINDINGS AND CONCLUSIONS There is currently no evidence (scientific publications, WHO, EFSA etc.) that COVID-19 disease can spread directly through food and the human digestive system. However, according to the hypothesis regarding the primary transmission of the virus, the source of which was food of animal origin (meat of wild animals), as well as the fact that food is a basic necessity for humans, it is worth emphasizing that food can, if not directly, be a carrier of the virus. Particular attention should be paid to this indirect pathway when considering the potential for the spread of an epidemic and the development of prevention principles.
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Kitajima M, Ahmed W, Bibby K, Carducci A, Gerba CP, Hamilton KA, Haramoto E, Rose JB. SARS-CoV-2 in wastewater: State of the knowledge and research needs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 739:139076. [PMID: 32758929 PMCID: PMC7191289 DOI: 10.1016/j.scitotenv.2020.139076] [Citation(s) in RCA: 479] [Impact Index Per Article: 119.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 04/26/2020] [Accepted: 04/26/2020] [Indexed: 04/13/2023]
Abstract
The ongoing global pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been a Public Health Emergency of International Concern, which was officially declared by the World Health Organization. SARS-CoV-2 is a member of the family Coronaviridae that consists of a group of enveloped viruses with single-stranded RNA genome, which cause diseases ranging from common colds to acute respiratory distress syndrome. Although the major transmission routes of SARS-CoV-2 are inhalation of aerosol/droplet and person-to-person contact, currently available evidence indicates that the viral RNA is present in wastewater, suggesting the need to better understand wastewater as potential sources of epidemiological data and human health risks. Here, we review the current knowledge related to the potential of wastewater surveillance to understand the epidemiology of COVID-19, methodologies for the detection and quantification of SARS-CoV-2 in wastewater, and information relevant for human health risk assessment of SARS-CoV-2. There has been growing evidence of gastrointestinal symptoms caused by SARS-CoV-2 infections and the presence of viral RNA not only in feces of infected individuals but also in wastewater. One of the major challenges in SARS-CoV-2 detection/quantification in wastewater samples is the lack of an optimized and standardized protocol. Currently available data are also limited for conducting a quantitative microbial risk assessment (QMRA) for SARS-CoV-2 exposure pathways. However, modeling-based approaches have a potential role to play in reducing the impact of the ongoing COVID-19 outbreak. Furthermore, QMRA parameters obtained from previous studies on relevant respiratory viruses help to inform risk assessments of SARS-CoV-2. Our understanding on the potential role of wastewater in SARS-CoV-2 transmission is largely limited by knowledge gaps in its occurrence, persistence, and removal in wastewater. There is an urgent need for further research to establish methodologies for wastewater surveillance and understand the implications of the presence of SARS-CoV-2 in wastewater.
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Affiliation(s)
- Masaaki Kitajima
- Division of Environmental Engineering, Faculty of Engineering, Hokkaido University, North 13 West 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan.
| | - Warish Ahmed
- CSIRO Land and Water, Ecosciences Precinct, 41 Boggo Road, Dutton Park, QLD 4102, Australia
| | - Kyle Bibby
- Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, 156 Fitzpatrick Hall, Notre Dame, IN 46556, USA
| | - Annalaura Carducci
- Department of Biology, University of Pisa, Via S. Zeno, 35-39, I-56123 Pisa, Italy
| | - Charles P Gerba
- Department of Environmental Science and Water & Energy Sustainable Technology (WEST) Center, The University of Arizona, 2959 W Calle Agua Nueva, Tucson, AZ 85745, USA
| | - Kerry A Hamilton
- School of Sustainable Engineering and the Built Environment and The Biodesign Institute Center for Environmental Health Engineering, Arizona State University, Tempe, AZ 85287, USA
| | - Eiji Haramoto
- Interdisciplinary Center for River Basin Environment, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan
| | - Joan B Rose
- Department of Fisheries and Wildlife, Michigan State University, 480 Wilson Road, East Lansing, MI 48824, USA
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34
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Kim YI, Casel MAB, Kim SM, Kim SG, Park SJ, Kim EH, Jeong HW, Poo H, Choi YK. Development of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) thermal inactivation method with preservation of diagnostic sensitivity. J Microbiol 2020; 58:886-891. [PMID: 32989642 PMCID: PMC7522010 DOI: 10.1007/s12275-020-0335-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/18/2020] [Accepted: 08/19/2020] [Indexed: 12/20/2022]
Abstract
Various treatments and agents had been reported to inactivate RNA viruses. Of these, thermal inactivation is generally considered an effective and cheap method of sample preparation for downstream assays. The purpose of this study is to establish a safe inactivation method for SARS-CoV-2 without compromising the amount of amplifiable viral genome necessary for clinical diagnoses. In this study, we demonstrate the infectivity and genomic stability of SARSCoV- 2 by thermal inactivation at both 56°C and 65°C. The results substantiate that viable SARS-CoV-2 is readily inactivated when incubated at 56°C for 30 min or at 65°C for 10 min. qRT-PCR of specimens heat-inactivated at 56°C for 30 min or 65°C for 15 min revealed similar genomic RNA stability compared with non-heat inactivated specimens. Further, we demonstrate that 30 min of thermal inactivation at 56°C could inactivate viable viruses from clinical COVID-19 specimens without attenuating the qRT-PCR diagnostic sensitivity. Heat treatment of clinical specimens from COVID-19 patients at 56°C for 30 min or 65°C for 15 min could be a useful method for the inactivation of a highly contagious agent, SARS-CoV-2. Use of this method would reduce the potential for secondary infections in BSL2 conditions during diagnostic procedures. Importantly, infectious virus can be inactivated in clinical specimens without compromising the sensitivity of the diagnostic RT-PCR assay.
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Affiliation(s)
- Young-Il Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, 28644, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Mark Anthony B Casel
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, 28644, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Se-Mi Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Seong-Gyu Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Su-Jin Park
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, 28644, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Eun-Ha Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, 28644, Republic of Korea
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Hye Won Jeong
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Haryoung Poo
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, University of Science and Technology, Daejeon, 34141, Republic of Korea
| | - Young Ki Choi
- College of Medicine and Medical Research Institute, Chungbuk National University, Cheongju, 28644, Republic of Korea.
- Zoonotic Infectious Diseases Research Center, Chungbuk National University, Cheongju, 28644, Republic of Korea.
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35
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Al-Sayah MH. Chemical disinfectants of COVID-19: an overview. JOURNAL OF WATER AND HEALTH 2020; 18:843-848. [PMID: 33095205 DOI: 10.2166/wh.2020.108] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The outbreak of coronavirus (COVID-19) has led to a broad use of chemical disinfectants in order to sterilize public spaces and prevent contamination. This paper surveys the chemicals that are effective in deactivating the virus and their mode of action. It presents the different chemical classes of disinfectants and identifies the chemical features of these compounds that pertain to their biocidal activity, relevant to surface/water disinfection.
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Affiliation(s)
- Mohammad Hussein Al-Sayah
- Department of Biology, Chemistry, and Environmental Sciences, American University of Sharjah, P.O. Box 26666, Sharjah, United Arab Emirates E-mail:
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36
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Singh D, Joshi K, Samuel A, Patra J, Mahindroo N. Alcohol-based hand sanitisers as first line of defence against SARS-CoV-2: a review of biology, chemistry and formulations. Epidemiol Infect 2020; 148:e229. [PMID: 32988431 PMCID: PMC7550876 DOI: 10.1017/s0950268820002319] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 09/23/2020] [Accepted: 09/23/2020] [Indexed: 12/15/2022] Open
Abstract
The pandemic due to Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) has emerged as a serious global public health issue. Since the start of the outbreak, the importance of hand-hygiene and respiratory protection to prevent the spread of the virus has been the prime focus for infection control. Health regulatory organisations have produced guidelines for the formulation of hand sanitisers to the manufacturing industries. This review summarises the studies on alcohol-based hand sanitisers and their disinfectant activity against SARS-CoV-2 and related viruses. The literature shows that the type and concentration of alcohol, formulation and nature of product, presence of excipients, applied volume, contact time and viral contamination load are critical factors that determine the effectiveness of hand sanitisers.
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Affiliation(s)
- D. Singh
- School of Health Sciences, University of Petroleum and Energy Studies, Energy Acres, Bidholi, Via Premnagar, Dehradun248007, Uttarakhand, India
| | - K. Joshi
- Department of Biotechnology, BJM School of Biosciences, Indian Institute of Technology Madras, Chennai, 600036, India
| | - A. Samuel
- Department of Morphology, Surgery and Experimental Medicine, Universita'Degli Studi di Ferrara, Via Savonarola, 9, 44121Ferrara, FE, Italy
| | - J. Patra
- School of Health Sciences, University of Petroleum and Energy Studies, Energy Acres, Bidholi, Via Premnagar, Dehradun248007, Uttarakhand, India
| | - N. Mahindroo
- School of Health Sciences, University of Petroleum and Energy Studies, Energy Acres, Bidholi, Via Premnagar, Dehradun248007, Uttarakhand, India
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37
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Khokhar M, Roy D, Purohit P, Goyal M, Setia P. Viricidal treatments for prevention of coronavirus infection. Pathog Glob Health 2020; 114:349-359. [PMID: 32877308 DOI: 10.1080/20477724.2020.1807177] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Coronavirus disease 2019 (COVID-19), which causes severe acute respiratory syndrome and lung failure, is caused by the novel coronavirus, also known as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Due to high transmission rates from individual to individual, it has progressed to a pandemic. However, indirect transmission from inanimate objects or surfaces that have come in contact with a patient poses an even more significant threat as it is difficult to trace the source of infection in these cases. Therefore, these surfaces and objects require disinfection with chemicals having potent viricidal activity. These include alcohols, aldehydes, quaternary ammonium compounds, chlorhexidine, and chlorine-based disinfectants, among others. They vary in their viricidal activity depending on their structure, concentrations, and mechanism of action. Several studies have looked into these agents and the transmission of the virus related to it. Moreover, certain viricides, if used as constituents of commercially available oral disinfectants, can further aid in preventing ventilator-associated pneumonia and maintain oral hygiene. However, these chemicals are not entirely free of potential hazards. In this review, we have compiled and critically appraised some commonly used viricidal agents in healthcare settings and the role they can play in the prevention of SARS-CoV-2 transmission.
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Affiliation(s)
- Manoj Khokhar
- Department of Biochemistry, AIIMS Jodhpur , Jodphur, India
| | - Dipayan Roy
- Department of Biochemistry, AIIMS Jodhpur , Jodphur, India
| | - Purvi Purohit
- Department of Biochemistry, AIIMS Jodhpur , Jodphur, India
| | - Manu Goyal
- Department of Obstetrics & Gynecology, AIIMS Jodhpur
| | - Puneet Setia
- Department of Forensic Medicine & Toxicology, AIIMS Jodhpur
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38
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Aboubakr HA, Sharafeldin TA, Goyal SM. Stability of SARS-CoV-2 and other coronaviruses in the environment and on common touch surfaces and the influence of climatic conditions: A review. Transbound Emerg Dis 2020; 68:296-312. [PMID: 32603505 PMCID: PMC7361302 DOI: 10.1111/tbed.13707] [Citation(s) in RCA: 251] [Impact Index Per Article: 62.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 12/31/2022]
Abstract
Although the unprecedented efforts the world has been taking to control the spread of the human coronavirus disease (COVID‐19) and its causative aetiology [severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2)], the number of confirmed cases has been increasing drastically. Therefore, there is an urgent need for devising more efficient preventive measures, to limit the spread of the infection until an effective treatment or vaccine is available. The preventive measures depend mainly on the understanding of the transmission routes of this virus, its environmental stability, and its persistence on common touch surfaces. Due to the very limited knowledge about SARS‐CoV‐2, we can speculate its stability in the light of previous studies conducted on other human and animal coronaviruses. In this review, we present the available data on the stability of coronaviruses (CoVs), including SARS‐CoV‐2, from previous reports to help understand its environmental survival. According to available data, possible airborne transmission of SARS‐CoV‐2 has been suggested. SARS‐CoV‐2 and other human and animal CoVs have remarkably short persistence on copper, latex and surfaces with low porosity as compared to other surfaces like stainless steel, plastics, glass and highly porous fabrics. It has also been reported that SARS‐CoV‐2 is associated with diarrhoea and that it is shed in the faeces of COVID‐19 patients. Some CoVs show persistence in human excrement, sewage and waters for a few days. These findings suggest a possible risk of faecal–oral, foodborne and waterborne transmission of SARS‐CoV‐2 in developing countries that often use sewage‐polluted waters in irrigation and have poor water treatment systems. CoVs survive longer in the environment at lower temperatures and lower relative humidity. It has been suggested that large numbers of COVID‐19 cases are associated with cold and dry climates in temperate regions of the world and that seasonality of the virus spread is suspected.
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Affiliation(s)
- Hamada A Aboubakr
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN, USA.,Department of Food Science and Technology, Faculty of Agriculture, Alexandria University, Alexandria, Egypt
| | - Tamer A Sharafeldin
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN, USA
| | - Sagar M Goyal
- Department of Veterinary Population Medicine, University of Minnesota, St. Paul, MN, USA
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39
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Hessling M, Hoenes K, Lingenfelder C. Selection of parameters for thermal coronavirus inactivation - a data-based recommendation. GMS HYGIENE AND INFECTION CONTROL 2020; 15:Doc16. [PMID: 32733781 PMCID: PMC7373095 DOI: 10.3205/dgkh000351] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Background: Healthcare workers and large parts of the population are currently using personal protective equipment, such as face masks, to avoid infections with the novel coronavirus SARS-CoV-2. This equipment must be sterilized as gently as possible before reuse. One possibility is thermal inactivation, but professional autoclaves with their high temperatures are often not available or suitable. If the inactivation period is long enough, coronavirus inactivation can also be carried out at relatively low temperatures. The required duration was determined in this study. Material and methods: Data from published thermal inactivation studies on coronaviruses were applied to determine the temperature dependence of the rate constant k(T) for each coronavirus by employing Arrhenius models. Results: The data obtained exhibit large variations, which appear to be at least partially caused by different sample properties. Samples with high protein content or samples in dry air sometimes seem to be more difficult to inactivate. Apart from this, the Arrhenius models describe the thermal inactivation properties well and SARS-CoV and SARS-CoV-2 can even be represented by a combined model. Furthermore, the available data suggest that all samples, including critical ones, can be mathematically included by a worst-case Arrhenius model. Conclusion: Coronaviruses can already be inactivated at relatively low temperatures. For most samples, application times of approximately 32.5, 3.7, and 0.5 minutes will be sufficient at 60°C, 80°C, and 100°C, respectively, for a 5 log-reduction. For difficult conditions, the worst-case model provides significantly longer application times of 490, 55, and 8 minutes for the temperatures mentioned.
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Affiliation(s)
- Martin Hessling
- Institute of Medical Engineering and Mechatronics, Ulm University of Applied Sciences, Ulm, Germany
| | - Katharina Hoenes
- Institute of Medical Engineering and Mechatronics, Ulm University of Applied Sciences, Ulm, Germany
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40
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Pitino MA, O'Connor DL, McGeer AJ, Unger S. The impact of thermal pasteurization on viral load and detectable live viruses in human milk and other matrices: a rapid review. Appl Physiol Nutr Metab 2020; 46:10-26. [PMID: 32650645 DOI: 10.1139/apnm-2020-0388] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Holder pasteurization (62.5 °C, 30 min) of human milk is thought to reduce the risk of transmitting viruses to an infant. Some viruses may be secreted into milk - others may be contaminants. The effect of thermal pasteurization on viruses in human milk has yet to be rigorously reviewed. The objective of this study is to characterize the effect of common pasteurization techniques on viruses in human milk and non-human milk matrices. Databases (MEDLINE, Embase, Web of Science) were searched from inception to April 20th, 2020, for primary research articles assessing the impact of pasteurization on viral load or detection of live virus. Reviews were excluded, as were studies lacking quantitative measurements or those assessing pasteurization as a component of a larger process. Overall, of 65 131 reports identified, 109 studies were included. Pasteurization of human milk at a minimum temperature of 56-60 °C is effective at reducing detectable live virus. In cell culture media or plasma, coronaviruses (e.g., SARS-CoV, SARS-CoV-2, MERS-CoV) are highly susceptible to heating at ≥56 °C. Although pasteurization parameters and matrices reported vary, all viruses studied, except parvoviruses, were susceptible to thermal killing. Future research important for the study of novel viruses should standardize pasteurization protocols and should test inactivation in human milk. Novelty In all matrices, including human milk, pasteurization at 62.5 °C was generally sufficient to reduce surviving viral load by several logs or to below the limit of detection. Holder pasteurization (62.5 °C, 30 min) of human milk should be sufficient to inactivate nonheat resistant viruses, including coronaviruses, if present.
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Affiliation(s)
- Michael A Pitino
- Department of Nutritional Sciences, University of Toronto, Toronto, ON M5S 1A8, Canada.,Translational Medicine Program, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Deborah L O'Connor
- Department of Nutritional Sciences, University of Toronto, Toronto, ON M5S 1A8, Canada.,Translational Medicine Program, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Allison J McGeer
- Department of Microbiology, Sinai Health, Toronto, ON M5G 1X5, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON M5S 1A1, Canada.,Dalla Lana School of Public Health, University of Toronto, Toronto, ON M5T 3M7, Canada
| | - Sharon Unger
- Department of Nutritional Sciences, University of Toronto, Toronto, ON M5S 1A8, Canada.,Division of Neonatology, The Hospital for Sick Children, Toronto, ON M5G 1X8, Canada.,Department of Pediatrics, Sinai Health, Toronto, ON M5G 1X5, Canada.,Department of Pediatrics, University of Toronto, Toronto, ON M5G 1X8, Canada
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41
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Deyab MA. Coronaviruses widespread on nonliving surfaces: important questions and promising answers. ACTA ACUST UNITED AC 2020; 75:363-367. [DOI: 10.1515/znc-2020-0105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 06/16/2020] [Indexed: 11/15/2022]
Abstract
Abstract
The world is facing, while writing this review, a global pandemic due to one of the types of the coronaviruses (i.e., COVID-19), which is a new virus. Among the most important reasons for the transmission of infection between humans is the presence of this virus active on the surfaces and materials. Here, we addressed important questions such as do coronaviruses remain active on the inanimate surfaces? Do the types of inanimate surfaces affect the activity of coronaviruses? What are the most suitable ingredients that used to inactivate viruses? This review article addressed many of the works that were done in the previous periods on the survival of many viruses from the coronaviruses family on various surfaces such as steel, glass, plastic, Teflon, ceramic tiles, silicon rubber and stainless steel copper alloys, Al surface, sterile sponges, surgical gloves and sterile latex. The impacts of environmental conditions such as temperature and humidity were presented and discussed. The most important active ingredients that can deactivate viruses on the surfaces were reported here. We hope that these active ingredients will have the same effect on COVID-19.
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Affiliation(s)
- Mohamed A. Deyab
- Egyptian Petroleum Research Institute (EPRI) , PO Box 11727 , Nasr City , Cairo , Egypt
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42
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Cimolai N. Environmental and decontamination issues for human coronaviruses and their potential surrogates. J Med Virol 2020; 92:2498-2510. [PMID: 32530505 PMCID: PMC7307025 DOI: 10.1002/jmv.26170] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 06/10/2020] [Indexed: 01/19/2023]
Abstract
Pandemic coronavirus disease‐2019 (COVID‐19) gives ample reason to generally review coronavirus (CoV) containment. For establishing some preliminary views on decontamination and disinfection, surrogate CoVs have commonly been assessed. This review serves to examine the existing science in regard to CoV containment generically and then to translate these findings into timely applications for COVID‐19. There is widespread dissemination of CoVs in the immediate patient environment, and CoVs can potentially be spread via respiratory secretions, urine, and stool. Interpretations of the spread however must consider whether studies examine for viral RNA, virus viability by culture, or both. Presymptomatic, asymptomatic, and post‐14 day virus excretion from patients may complicate the epidemiology. Whereas droplet spread is accepted, there continues to be controversy over the extent of possible airborne spread and especially now for severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2). CoVs are stable in body secretions and sewage at reduced temperatures. In addition to temperature, dryness or relative humidity, initial viral burden, concomitant presence of bioburden, and the type of surface can all affect stability. Generalizing, CoVs can be susceptible to radiation, temperature extremes, pH extremes, peroxides, halogens, aldehydes, many solvents, and several alcohols. Whereas detergent surfactants can have some direct activity, these agents are better used as complements to a complex disinfectant solution. Disinfectants with multiple agents and adverse pH are more likely to be best active at higher water temperatures. Real‐life assessments should be encouraged with working dilutions. The use of decontamination and disinfection should be balanced with considerations of patient and caregiver safety. Processes should also be balanced with considerations for other potential pathogens that must be targeted. Given some CoV differences and given that surrogate testing provides experimental correlates at best, direct assessments with SARS‐CoV, Middle East respiratory syndrome‐related coronavirus (MERS‐CoV), and SARS‐CoV‐2 are required. Environmental spread in the immediate context of infected hosts is common for coronaviruses. The epidemiology of coronavirus infections is complicated by presymptomatic, asymptomatic, and post‐fourteen day infection spread. Mechanical removal of associated organic debris is vital to effective coronavirus decontamination. Proper exposure times for disinfection are vital to effective coronavirus inactivation. Temperature of disinfectant working dilutions and pH can have impact on antiviral activity. The immediate patient environment should be simplified for necessary and reusable items. Coronavirus inactivation should be considered in the context of other pathogens that need to be inactivated simultaneously.
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Affiliation(s)
- Nevio Cimolai
- Faculty of Medicine, The University of British Columbia, Vancouver, British Columbia, Canada.,Children's and Women's Health Centre of British Columbia, Vancouver, British Columbia, Canada
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43
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Abraham JP, Plourde BD, Cheng L. Using heat to kill SARS-CoV-2. Rev Med Virol 2020; 30:e2115. [PMID: 32614102 PMCID: PMC7361064 DOI: 10.1002/rmv.2115] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 04/24/2020] [Accepted: 04/27/2020] [Indexed: 11/12/2022]
Abstract
The current coronavirus pandemic has reached global proportions and requires unparalleled collective and individual efforts to slow its spread. One critically important issue is the proper sterilization of physical objects that have been contaminated by the virus. Here, we review the currently existing literature on thermal inactivation of coronavirus (SARS‐CoV‐2) and present preliminary guideless on temperatures and exposure durations required to sterilize. We also compare these temperatures/exposure durations with potential household appliances that may be thought capable of performing sterilization.
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Affiliation(s)
- John P Abraham
- School of Engineering, University of St. Thomas, St. Paul, Minnesota, USA
| | - Brian D Plourde
- School of Engineering, University of St. Thomas, St. Paul, Minnesota, USA
| | - Lijing Cheng
- International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
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44
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Abstract
COVID-19, a novel infectious disease, caused by SARS-CoV-2, affected millions of people around the world with a high mortality rate. Although SARS-CoV-2 mainly causes lung infection, gastrointestinal symptoms described in COVID-19 patients and detection of the viral RNA in feces of infected patients drove attentions to a possible fecal-oral transmission route of SARS-CoV-2. However, not only the viral RNA but also the infectious viral particles are required for the viral infection and no proof has been demonstrated the transmission of the infectious virus particles via the fecal-oral route yet. Growing evidence indicates the crosstalk between gut microbiota and lung, that maintains host homeostasis and disease development with the association of immune system. This gut-lung interaction may influence the COVID-19 severity in patients with extrapulmonary conditions. Severity of COVID-19 has mostly associated with old ages and underlying medical conditions. Since the diversity in the gut microbiota decreases during aging, dysbiosis could be the reason for older adults being at high risk for severe illness from COVID-19. We believe that gut microbiota contributes to the course of COVID-19 due to its bidirectional relationship with immune system and lung. Dysbiosis in gut microbiota results in gut permeability leading to secondary infection and multiple organ failure. Conversely, disruption of the gut barrier integrity due to dysbiosis may lead to translocation of SARS-CoV-2 from the lung into the intestinal lumen via circulatory and lymphatic system. This review points out the role of dysbiosis of the gut microbiota involving in sepsis, on the severity of SARS-CoV-2 infection. Additionally, this review aims to clarify the ambiguity in fecal-oral transmission of SARS- CoV-2.
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Affiliation(s)
- Busra AKTAS
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Burdur Mehmet Akif Ersoy University, BurdurTurkey
| | - Belma ASLIM
- Department of Biology, Faculty of Science, Gazi University, AnkaraTurkey
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45
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Quantum Leap from Gold and Silver to Aluminum Nanoplasmonics for Enhanced Biomedical Applications. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10124210] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Nanotechnology has been used in many biosensing and medical applications, in the form of noble metal (gold and silver) nanoparticles and nanostructured substrates. However, the translational clinical and industrial applications still need improvements of the efficiency, selectivity, cost, toxicity, reproducibility, and morphological control at the nanoscale level. In this review, we highlight the recent progress that has been made in the replacement of expensive gold and silver metals with the less expensive aluminum. In addition to low cost, other advantages of the aluminum plasmonic nanostructures include a broad spectral range from deep UV to near IR, providing additional signal enhancement and treatment mechanisms. New synergistic treatments of bacterial infections, cancer, and coronaviruses are envisioned. Coupling with gain media and quantum optical effects improve the performance of the aluminum nanostructures beyond gold and silver.
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46
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Kampf G, Todt D, Pfaender S, Steinmann E. Corrigendum to "Persistence of coronaviruses on inanimate surfaces and their inactivation with biocidal agents" [J Hosp Infect 104 (2020) 246-251]. J Hosp Infect 2020; 104:246-251. [PMID: 32035997 PMCID: PMC7132493 DOI: 10.1016/j.jhin.2020.01.022] [Citation(s) in RCA: 1904] [Impact Index Per Article: 476.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 01/31/2020] [Indexed: 12/11/2022]
Affiliation(s)
- G Kampf
- University Medicine Greifswald, Institute for Hygiene and Environmental Medicine, Ferdinand-Sauerbruch-Straße, 17475 Greifswald, Germany.
| | - D Todt
- Department of Molecular and Medical Virology, Ruhr University Bochum, Universitätsstrasse 50, 44801 Bochum, Germany
| | - S Pfaender
- Department of Molecular and Medical Virology, Ruhr University Bochum, Universitätsstrasse 50, 44801 Bochum, Germany
| | - E Steinmann
- Department of Molecular and Medical Virology, Ruhr University Bochum, Universitätsstrasse 50, 44801 Bochum, Germany
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47
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On the Coronaviruses and Their Associations with the Aquatic Environment and Wastewater. WATER 2020. [DOI: 10.3390/w12061598] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The outbreak of Coronavirus Disease 2019 (COVID-19), a severe respiratory disease caused by betacoronavirus SARS-CoV-2, in 2019 that further developed into a pandemic has received an unprecedented response from the scientific community and sparked a general research interest into the biology and ecology of Coronaviridae, a family of positive-sense single-stranded RNA viruses. Aquatic environments, lakes, rivers and ponds, are important habitats for bats and birds, which are hosts for various coronavirus species and strains and which shed viral particles in their feces. It is therefore of high interest to fully explore the role that aquatic environments may play in coronavirus spread, including cross-species transmissions. Besides the respiratory tract, coronaviruses pathogenic to humans can also infect the digestive system and be subsequently defecated. Considering this, it is pivotal to understand whether wastewater can play a role in their dissemination, particularly in areas with poor sanitation. This review provides an overview of the taxonomy, molecular biology, natural reservoirs and pathogenicity of coronaviruses; outlines their potential to survive in aquatic environments and wastewater; and demonstrates their association with aquatic biota, mainly waterfowl. It also calls for further, interdisciplinary research in the field of aquatic virology to explore the potential hotspots of coronaviruses in the aquatic environment and the routes through which they may enter it.
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48
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Heßling M, Hönes K, Vatter P, Lingenfelder C. Ultraviolet irradiation doses for coronavirus inactivation - review and analysis of coronavirus photoinactivation studies. GMS HYGIENE AND INFECTION CONTROL 2020; 15:Doc08. [PMID: 32547908 PMCID: PMC7273323 DOI: 10.3205/dgkh000343] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Background: To slow the increasing global spread of the SARS-CoV-2 virus, appropriate disinfection techniques are required. Ultraviolet radiation (UV) has a well-known antiviral effect, but measurements on the radiation dose necessary to inactivate SARS-CoV-2 have not been published so far. Methods: Coronavirus inactivation experiments with ultraviolet light performed in the past were evaluated to determine the UV radiation dose required for a 90% virus reduction. This analysis is based on the fact that all coronaviruses have a similar structure and similar RNA strand length. Results: The available data reveals large variations, which are apparently not caused by the coronaviruses but by the experimental conditions selected. If these are excluded as far as possible, it appears that coronaviruses are very UV sensitive. The upper limit determined for the log-reduction dose (90% reduction) is approximately 10.6 mJ/cm2 (median), while the true value is probably only 3.7 mJ/cm2 (median). Conclusion: Since coronaviruses do not differ structurally to any great exent, the SARS-CoV-2 virus – as well as possible future mutations – will very likely be highly UV sensitive, so that common UV disinfection procedures will inactivate the new SARS-CoV-2 virus without any further modification.
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Affiliation(s)
- Martin Heßling
- Institute of Medical Engineering and Mechatronics, Ulm University of Applied Sciences, Ulm, Germany
| | - Katharina Hönes
- Institute of Medical Engineering and Mechatronics, Ulm University of Applied Sciences, Ulm, Germany
| | - Petra Vatter
- Institute of Medical Engineering and Mechatronics, Ulm University of Applied Sciences, Ulm, Germany
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49
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MUSTAFA N, ZAHOOR H, MAJOO FM. İnsan-COVID-19'da Pandemik SARS Coronavirus-2 Enfeksiyonları. İSTANBUL GELIŞIM ÜNIVERSITESI SAĞLIK BILIMLERI DERGISI 2020. [DOI: 10.38079/igusabder.695778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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50
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Shidham VB, Frisch NK, Layfield LJ. Severe acute respiratory syndrome coronavirus 2 (the cause of COVID 19) in different types of clinical specimens and implications for cytopathology specimen: An editorial review with recommendations. Cytojournal 2020; 17:7. [PMID: 32395151 PMCID: PMC7210469 DOI: 10.25259/cytojournal_24_2020] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 04/08/2020] [Indexed: 01/25/2023] Open
Affiliation(s)
- Vinod B. Shidham
- Department of Pathology, Karmanos Cancer Center and Detroit Medical Center, Wayne State University School of Medicine, Detroit, Michigan
| | - Nora K. Frisch
- Department of Pathology, The University of Vermont Medical Center, Burlington, Vermont, United States
| | - Lester J. Layfield
- Department of Pathology, University of Missouri, Columbia, Missouri, United States
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