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Hamilton AN, Maes F, Reyes GYC, Almeida G, Li D, Uyttendaele M, Gibson KE. Machine Learning and Imputation to Characterize Human Norovirus Genotype Susceptibility to Sodium Hypochlorite. FOOD AND ENVIRONMENTAL VIROLOGY 2024:10.1007/s12560-024-09613-3. [PMID: 39259473 DOI: 10.1007/s12560-024-09613-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2024] [Accepted: 08/26/2024] [Indexed: 09/13/2024]
Abstract
Human norovirus (HuNoV) is the leading cause of foodborne illness in the developed world and a major contributor to gastroenteritis globally. Its low infectious dose and environmental persistence necessitate effective disinfection protocols. Sodium hypochlorite (NaOCl) bleach is a widely used disinfectant for controlling HuNoV transmission via contaminated fomites. This study aimed to evaluate the susceptibility of HuNoV genotypes (n = 11) from genogroups I, II, and IV to NaOCl in suspension. HuNoV was incubated for 1 and 5 min in diethyl pyrocarbonate (DEPC) treated water containing 50 ppm, 100 ppm, or 150 ppm NaOCl, buffered to maintain a pH between 7.0 and 7.5. Neutralization was achieved by a tenfold dilution into 100% fetal bovine serum. RNase pre-treatment followed by RT-qPCR was used to distinguish between infectious and non-infectious HuNoV. Statistical methods, including imputation, machine learning, and generalized linear models, were applied to process and analyze the data. Results showed that NaOCl reduced viral loads across all genotypes, though efficacy varied. Genotypes GI.1, GII.4 New Orleans, and GII.4 Sydney were the least susceptible, while GII.6 and GII.13 were the most susceptible. All NaOCl concentrations above 0 ppm were statistically indistinguishable, and exposure duration did not significantly affect HuNoV reduction, suggesting rapid inactivation at effective concentrations. For instance, some genotypes were completely inactivated within 1 min, rendering extended exposure unnecessary, while other genotypes maintained the initial concentration at both 1 and 5 min, indicating a need for longer contact times. These findings underscore the critical role of HuNoV genotype selection in testing disinfection protocols and optimizing NaOCl concentrations. Understanding HuNoV susceptibility to NaOCl bleach informs better disinfection strategies, aiding public health and food safety authorities in reducing HuNoV transmission and outbreaks.
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Affiliation(s)
- Allyson N Hamilton
- Department of Food Science, Center for Food Safety, University of Arkansas System Division of Agriculture, 1371 West Altheimer Dr, Fayetteville, AR, 72704, USA
| | - Flor Maes
- Department of Food Science, Center for Food Safety, University of Arkansas System Division of Agriculture, 1371 West Altheimer Dr, Fayetteville, AR, 72704, USA
- Food Microbiology and Food Preservation Research Unit, Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, 9000, Ghent, Belgium
- BESTMIX® Software, Vlaanderen, Maldegem, Belgium
| | - Génesis Yosbeth Chávez Reyes
- Department of Food Science, Center for Food Safety, University of Arkansas System Division of Agriculture, 1371 West Altheimer Dr, Fayetteville, AR, 72704, USA
- Steuben Foods Inc., Bozeman, Montana, United States
| | - Giselle Almeida
- Department of Food Science, Center for Food Safety, University of Arkansas System Division of Agriculture, 1371 West Altheimer Dr, Fayetteville, AR, 72704, USA
- Arkansas Children's Hospital, Little Rock, Arkansas, United States
| | - Dan Li
- Department of Food Science & Technology, Faculty of Science, National University of Singapore (NUS), Singapore, 117542, Singapore
| | - Mieke Uyttendaele
- Food Microbiology and Food Preservation Research Unit, Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, 9000, Ghent, Belgium
| | - Kristen E Gibson
- Department of Food Science, Center for Food Safety, University of Arkansas System Division of Agriculture, 1371 West Altheimer Dr, Fayetteville, AR, 72704, USA.
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Chanakya B, Karunakaran K, Dsa OC, Sanghvi AP, Mukhopadhyay C, Mudgal PP. Leveraging virucidal potential of an anti-microbial coating agent to mitigate fomite transmission of respiratory viruses. CURRENT RESEARCH IN MICROBIAL SCIENCES 2024; 7:100261. [PMID: 39104780 PMCID: PMC11299590 DOI: 10.1016/j.crmicr.2024.100261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2024] Open
Abstract
In the wake of the COVID-19 pandemic, respiratory tract infections have emerged as a significant global threat, yet their impact on public health was previously underappreciated. This study investigated the antiviral efficacy of the nano-coating agent BARRIER90, composed of silicon-quaternary ammonium compound and a naturally derived biopolymer, against three distinct respiratory viruses: Influenza A (H1N1), Adenovirus Type 1, and Enterovirus-Coxsackie B1. BARRIER90 exhibited robust and sustained virucidal activity, persisting up to 90 days post-coating, against the enveloped virus, Influenza A, with significant reduction in viral plaques. Contrastingly, its efficacy against non-enveloped viruses revealed transient activity against Enterovirus-Coxsackie B1, with almost no antiviral activity observed against Adenovirus Type 1. These findings indicate the potential of antimicrobial coatings in mitigating viral transmission through contaminated surfaces (fomites), which harbour pathogenic viruses for longer periods. Antimicrobial coatings may facilitate infection control in various settings, including healthcare facilities and shared workspaces.
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Affiliation(s)
- Bommana Chanakya
- Manipal Institute of Virology, Manipal Academy of Higher Education (MAHE), Manipal, India
| | - Kavitha Karunakaran
- Manipal Institute of Virology, Manipal Academy of Higher Education (MAHE), Manipal, India
| | - Oliver Christy Dsa
- Manipal Institute of Virology, Manipal Academy of Higher Education (MAHE), Manipal, India
| | | | - Chiranjay Mukhopadhyay
- Manipal Institute of Virology, Manipal Academy of Higher Education (MAHE), Manipal, India
| | - Piya Paul Mudgal
- Manipal Institute of Virology, Manipal Academy of Higher Education (MAHE), Manipal, India
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Guan B, Hong H, Kim M, Lu J, Moore MD. Evaluating the Potential of Ozone Microbubbles for Inactivation of Tulane Virus, a Human Norovirus Surrogate. ACS OMEGA 2024; 9:23184-23192. [PMID: 38854534 PMCID: PMC11154720 DOI: 10.1021/acsomega.3c08396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 05/11/2024] [Accepted: 05/15/2024] [Indexed: 06/11/2024]
Abstract
This study investigated the efficacy of low-dose ozone microbubble solution and conventional aqueous ozone as inactivation agents against Tulane virus samples in water over a short period of time. Noroviruses are the primary cause of foodborne illnesses in the US, and the development of effective inactivation agents is crucial. Ozone has a high oxidizing ability and naturally decomposes to oxygen, but it has limitations due to its low dissolution rate, solubility, and stability. Ozone microbubbles have been promising in enhancing inactivation, but little research has been done on their efficacy against noroviruses. The study examined the influence of the dissolved ozone concentration, inactivation duration, and presence of organic matter during inactivation. The results showed that ozone microbubbles had a longer half-life (14 ± 0.81 min) than aqueous ozone (3 ± 0.35 min). After 2, 10, and 20 min postgeneration, the ozone concentration of microbubbles naturally decreased from 4 ppm to 3.2 ± 0.2, 2.26 ± 0.19, and 1.49 ± 0.23 ppm and resulted in 1.43 ± 0.44, 0.88 ± 0.5, and 0.68 ± 0.53 log10 viral reductions, respectively, while the ozone concentration of aqueous ozone decreased from 4 ppm to 2.52 ± 0.07, 0.43 ± 0.05, and 0.09 ± 0.01 ppm and produced 0.8 ± 0.28, 0.29 ± 0.41, and 0.16 ± 0.21 log10 reductions against Tulane virus, respectively (p = 0.0526), suggesting that structuring of ozone in the bubbles over the applied treatment conditions did not have a significant effect, though future study with continuous generation of ozone microbubbles is needed.
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Affiliation(s)
- Bozhong Guan
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Haknyeong Hong
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Minji Kim
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Jiakai Lu
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, United States
| | - Matthew D. Moore
- Department of Food Science, University of Massachusetts, Amherst, Massachusetts 01003, United States
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Zdybel S, Sosnowska A, Kowalska D, Sommer J, Conrady B, Mester P, Gromelski M, Puzyn T. Hybrid Machine Learning and Experimental Studies of Antiviral Potential of Ionic Liquids against P100, MS2, and Phi6. J Chem Inf Model 2024; 64:1996-2007. [PMID: 38452014 DOI: 10.1021/acs.jcim.3c02037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2024]
Abstract
Viruses are a group of widespread organisms that are often responsible for very dangerous diseases, as most of them follow a mechanism to multiply and infect their hosts as quickly as possible. Pathogen viruses also mutate regularly, with the result that measures to prevent virus transmission and recover from the disease caused are often limited. The development of new substances is very time-consuming and highly budgeted and requires the sacrifice of many living organisms. Computational chemistry methods allow faster analysis at a much lower cost and, most importantly, reduce the number of living organisms sacrificed experimentally to a minimum. Ionic liquids (ILs) are a group of chemical compounds that could potentially find a wide range of applications due to their potential virucidal activity. In our study, we conducted a complex computational analysis to predict the antiviral activity of ionic liquids against three surrogate viruses: two nonenveloped viruses, Listeria monocytogenes phage P100 and Escherichia coli phage MS2, and one enveloped virus, Pseudomonas syringae phage Phi6. Based on experimental data of toxic activity (logEC90), we assigned activity classes to 154 ILs. Prediction models were created and validated according to the Organization for Economic Co-operation and Development (OECD) recommendations using the Classification Tree method. Further, we performed an external validation of our models through virtual screening on a set of 1277 theoretically generated ionic liquids and then selected 10 active ionic liquids, which were synthesized to verify their activity against the analyzed viruses. Our study proved the effectiveness and efficiency of computational methods to predict the antiviral activity of ionic liquids. Thus, computational models are a cost-effective alternative approach compared with time-consuming experimental studies where live animals are involved.
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Affiliation(s)
- Szymon Zdybel
- QSAR Lab, ul. Trzy Lipy 3, 80-172 Gdańsk, Poland
- Laboratory of Environmental Chemometrics, Faculty of Chemistry, University of Gdansk, 80-308 Gdańsk, Poland
| | - Anita Sosnowska
- QSAR Lab, ul. Trzy Lipy 3, 80-172 Gdańsk, Poland
- Laboratory of Environmental Chemometrics, Faculty of Chemistry, University of Gdansk, 80-308 Gdańsk, Poland
| | | | - Julia Sommer
- Unit of Food Microbiology, Institute of Food Safety, Food Technology and Veterinary Public Health, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria
| | - Beate Conrady
- Department of Veterinary and Animal Sciences, University of Copenhagen, Grønnegårdsvej 8, 1870 Frederiksberg Campus, Copenhagen DK-1870, Denmark
| | - Patrick Mester
- Unit of Food Microbiology, Institute of Food Safety, Food Technology and Veterinary Public Health, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria
| | | | - Tomasz Puzyn
- QSAR Lab, ul. Trzy Lipy 3, 80-172 Gdańsk, Poland
- Laboratory of Environmental Chemometrics, Faculty of Chemistry, University of Gdansk, 80-308 Gdańsk, Poland
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Boyce JM. Quaternary ammonium disinfectants and antiseptics: tolerance, resistance and potential impact on antibiotic resistance. Antimicrob Resist Infect Control 2023; 12:32. [PMID: 37055844 PMCID: PMC10099023 DOI: 10.1186/s13756-023-01241-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 04/07/2023] [Indexed: 04/15/2023] Open
Abstract
BACKGROUND Due to the substantial increase in the use of disinfectants containing quaternary ammonion compounds (QACs) in healthcare and community settings during the COVID-19 pandemic, there is increased concern that heavy use might cause bacteria to develop resistance to QACs or contribute to antibiotic resistance. The purpose of this review is to briefly discuss the mechanisms of QAC tolerance and resistance, laboratory-based evidence of tolerance and resistance, their occurrence in healthcare and other real-world settings, and the possible impact of QAC use on antibiotic resistance. METHODS A literature search was conducted using the PubMed database. The search was limited to English language articles dealing with tolerance or resistance to QACs present in disinfectants or antiseptics, and potential impact on antibiotic resistance. The review covered the period from 2000 to mid-Jan 2023. RESULTS Mechanisms of QAC tolerance or resistance include innate bacterial cell wall structure, changes in cell membrane structure and function, efflux pumps, biofilm formation, and QAC degradation. In vitro studies have helped elucidate how bacteria can develop tolerance or resistance to QACs and antibiotics. While relatively uncommon, multiple episodes of contaminated in-use disinfectants and antiseptics, which are often due to inappropriate use of products, have caused outbreaks of healthcare-associated infections. Several studies have identified a correlation between benzalkonium chloride (BAC) tolerance and clinically-defined antibiotic resistance. The occurrence of mobile genetic determinants carrying multiple genes that encode for QAC or antibiotic tolerance raises the concern that widespread QAC use might facilitate the emergence of antibiotic resistance. Despite some evidence from laboratory-based studies, there is insufficient evidence in real-world settings to conclude that frequent use of QAC disinfectants and antiseptics has promoted widespread emergence of antibiotic resistance. CONCLUSIONS Laboratory studies have identified multiple mechanisms by which bacteria can develop tolerance or resistance to QACs and antibiotics. De novo development of tolerance or resistance in real-world settings is uncommon. Increased attention to proper use of disinfectants is needed to prevent contamination of QAC disinfectants. Additional research is needed to answer many questions and concerns related to use of QAC disinfectants and their potential impact on antibiotic resistance.
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Affiliation(s)
- John M Boyce
- J.M. Boyce Consulting, LLC, 5123 Town Place, Middletown, CT, Connecticut, USA.
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6
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Min A, Hossain MI, Jung S, Yeo D, Wang Z, Song M, Zhao Z, Park S, Choi C. Evaluation of the efficacy of ethanol, peracetic acid, and quaternary ammonium compounds against murine norovirus using carrier and suspension tests. Food Control 2023. [DOI: 10.1016/j.foodcont.2022.109325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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7
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Defeat undefeatable: ionic liquids as novel antimicrobial agents. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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8
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Faircloth J, Goulter RM, Manuel CS, Arbogast JW, Escudero-Abarca B, Jaykus LA. The Efficacy of Commercial Surface Sanitizers against Norovirus on Formica Surfaces with and without Inclusion of a Wiping Step. Appl Environ Microbiol 2022; 88:e0080722. [PMID: 36005755 PMCID: PMC9469706 DOI: 10.1128/aem.00807-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 08/05/2022] [Indexed: 11/20/2022] Open
Abstract
Commonly used surface sanitizers often lack activity against human noroviruses (hNoVs). The impact of inactivation versus removal when these products are applied via wiping is poorly characterized. The purpose of this work was to assess the anti-hNoV efficacy of various surface sanitizer chemistries, as applied to a laminate material commonly used for restaurant tabletops, using standard surface assays (ASTM E1053-11) and a newly developed wiping protocol. Four commercially available products with different active ingredient(s) (i.e., ethanol [EtOH], acid + anionic surfactant [AAS], quaternary ammonium compound [QAC], and sodium hypochlorite [NaOCl]) and a water control were evaluated against hNoV GII.4 Sydney, hNoV GI.6, and the cultivable surrogate Tulane virus (TuV). Virus concentration was evaluated using RNase-reverse transcriptase (RT)-quantitative PCR (qPCR) (hNoV) and infectivity assay (TuV). Only the EtOH-based product significantly reduced virus concentration (>3.5 log10 reduction [LR]) by surface assay, with all other products producing ≤0.5 LR. The inclusion of a wiping step enhanced the efficacy of all products, producing complete virus elimination for the EtOH-based product and 1.6 to 3.8 LR for the other chemistries. For hNoVs, no detectable residual virus could be recovered from paper towels used to wipe the EtOH-based product, while high concentrations of virus could be recovered from the used paper towel and the wiped coupon (1.5 to 2.5 log10 lower genome equivalent copies [GEC] compared to control) for the QAC- and AAS-based products and for water. These results illustrate the variability in anti-hNoV activity of representative surface sanitizers and highlights the value of wiping, the efficacy of which appears to be driven by a combination of virus inactivation and removal. IMPORTANCE Human noroviruses (hNoVs) are the leading cause of acute gastroenteritis and food-borne disease worldwide. Noroviruses are difficult to inactivate, being recalcitrant to sanitizers and disinfectants commonly used by the retail food sector. This comparative study demonstrates the variability in anti-hNoV activity of representative surface sanitizers, even those allowed to make label claims based on the cultivable surrogate, feline calicivirus (FCV). It also highlights the importance of wiping in the process of sanitization, which significantly improves product efficacy through the action of physical removal of surface microbes. There is a need for more and better product formulations with demonstrated efficacy against hNoVs, which will likely necessitate the use of alternative cultivable surrogates, such as Tulane virus (TuV). These findings help food safety professionals make informed decisions on sanitizing product selection and application methods in order to reduce the risk of hNoV contamination and transmission in their facilities.
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Affiliation(s)
- Jeremy Faircloth
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Rebecca M. Goulter
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | | | | | - Blanca Escudero-Abarca
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina, USA
| | - Lee-Ann Jaykus
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, North Carolina, USA
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9
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Merettig N, Bockmühl DP. Virucidal Efficacy of Laundering. Pathogens 2022; 11:993. [PMID: 36145425 PMCID: PMC9503802 DOI: 10.3390/pathogens11090993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/17/2022] [Accepted: 08/26/2022] [Indexed: 11/23/2022] Open
Abstract
Viruses contribute significantly to the burden of infectious diseases worldwide. Although there are multiple infection routes associated with viruses, it is important to break the chain of infection and thus consider all possible transmission routes. Consequently, laundering can be a means to eliminate viruses from textiles, in clinical settings well as for domestic laundry procedures. Several factors influence the survival and inactivation of microorganisms, including viruses on hard surfaces and textiles. Therefore, textiles should be regarded as potential fomites. While in clinical and industrial settings laundry hygiene is ensured by standardized processes, temperatures of at least 60 °C and the use of oxidizing agents, domestic laundry is not well defined. Thus, the parameters affecting viral mitigation must be understood and prudently applied, especially in domestic laundering. Laundering can serve as a means to break the chain of infection for viral diseases by means of temperature, time, chemistry and mechanical action.
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Affiliation(s)
| | - Dirk P. Bockmühl
- Faculty of Life Sciences, Rhine-Waal University of Applied Sciences, 47533 Kleve, Germany
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Escudero-Abarca BI, Goulter RM, Manuel CS, Leslie RA, Green K, Arbogast JW, Jaykus LA. Comparative Assessment of the Efficacy of Commercial Hand Sanitizers Against Human Norovirus Evaluated by an in vivo Fingerpad Method. Front Microbiol 2022; 13:869087. [PMID: 35464915 PMCID: PMC9021954 DOI: 10.3389/fmicb.2022.869087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 02/25/2022] [Indexed: 11/13/2022] Open
Abstract
Human noroviruses (hNoV) are the leading cause of acute non-bacterial gastroenteritis worldwide and contaminated hands play a significant role in the spread of disease. Some hand sanitizers claim to interrupt hNoV transmission, but their antiviral efficacy on human hands is poorly characterized. The purpose of this work was to characterize the efficacy of representative commercial hand sanitizers against hNoV using an in vivo fingerpad method (ASTM E1838-17). Eight products [seven ethanol-based and one benzalkonium chloride (BAK)-based], and a benchmark 60% ethanol solution, were each evaluated on 10 human volunteers using the epidemic GII.4 hNoV strain. Virus titers before and after treatment were evaluated by RT-qPCR preceded by RNase treatment; product efficacy was characterized by log10 reduction (LR) in hNoV genome equivalent copies after treatment. The benchmark treatment produced a 1.7 ± 0.5 LR, compared with Product A (containing 85% ethanol) which produced a 3.3 ± 0.3 LR and was the most efficacious (p < 0.05). Product B (containing 70% ethanol), while less efficacious than Product A (p < 0.05), performed better than the benchmark with a LR of 2.4 ± 0.4. Five of the other ethanol-based products (labeled ethanol concentration ranges of 62–80%) showed similar efficacy to the 60% ethanol benchmark with LR ranging from 1.3 to 2.0 (p > 0.05). Product H (0.1% BAK) was less effective than the benchmark with a LR of 0.3 ± 0.2 (p < 0.05). None of the products screened were able to completely eliminate hNoV (maximum assay resolution 5.0 LR). Product performance was variable and appears driven by overall formulation. There remains a need for more hand sanitizer formulations having greater activity against hNoV, a virus that is comparatively recalcitrant relative to other pathogens of concern in community, healthcare, and food preparation environments.
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Affiliation(s)
- Blanca I. Escudero-Abarca
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC, United States
| | - Rebecca M. Goulter
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC, United States
- *Correspondence: Rebecca M. Goulter,
| | | | | | | | | | - Lee-Ann Jaykus
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC, United States
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Abstract
Human norovirus (HuNoV) is the leading cause of epidemic and sporadic acute gastroenteritis worldwide. HuNoV transmission occurs predominantly by direct person-to-person contact, and its health burden is associated with poor hand hygiene and a lack of effective antiseptics and disinfectants. Specific therapies and methods to prevent and control HuNoV spread previously were difficult to evaluate because of the lack of a cell culture system to propagate infectious virus. This barrier has been overcome with the successful cultivation of HuNoV in nontransformed human intestinal enteroids (HIEs). Here, we report using the HIE cultivation system to evaluate the virucidal efficacy of an olanexidine gluconate-based hand rub (OLG-HR) and 70% ethanol (EtOH70%) against HuNoVs. OLG-HR exhibited fast-acting virucidal activity against a spectrum of HuNoVs including GII.4 Sydney[P31], GII.4 Den Haag[P4], GII.4 New Orleans[P4], GII.3[P21], GII.17[P13], and GI.1[P1] strains. Exposure of HuNoV to OLG-HR for 30 to 60 s resulted in complete loss of the ability of virus to bind to the cells and reduced in vitro binding to glycans in porcine gastric mucin. By contrast, the virucidal efficiency of EtOH70% on virus infectivity was strain specific. Dynamic light scattering (DLS) and electron microscopy of virus-like particles (VLPs) show that OLG-HR treatment causes partial disassembly and possibly conformational changes in VP1, interfering with histo-blood group antigen (HBGA) binding and infectivity, whereas EtOH70% treatment causes particle disassembly and clumping of the disassembled products, leading to loss of infectivity while retaining HBGA binding. The highly effective inactivation of HuNoV infectivity by OLG-HR suggests that this compound could reduce HuNoV transmission.
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12
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Ezzatpanah H, Gómez‐López VM, Koutchma T, Lavafpour F, Moerman F, Mohammadi M, Raheem D. New food safety challenges of viral contamination from a global perspective: Conventional, emerging, and novel methods of viral control. Compr Rev Food Sci Food Saf 2022; 21:904-941. [DOI: 10.1111/1541-4337.12909] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 12/13/2021] [Accepted: 12/16/2021] [Indexed: 12/11/2022]
Affiliation(s)
- Hamid Ezzatpanah
- Department of Food Science and Technology, Science and Research Branch Islamic Azad University Tehran Iran
| | | | - Tatiana Koutchma
- Guelph Research and Development Center Agriculture and Agri‐Food Canada Guelph Ontario Canada
| | | | - Frank Moerman
- Department of Chemistry Catholic University of Leuven ‐ KU Leuven Leuven Belgium
| | | | - Dele Raheem
- Arctic Centre (NIEM) University of Lapland Rovaniemi Finland
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13
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Escudero-Abarca BI, Goulter RM, Bradshaw J, Faircloth J, Leslie RA, Manuel CS, Arbogast JW, Jaykus LA. Efficacy of an alcohol-based surface disinfectant formulation against human norovirus. J Appl Microbiol 2022; 132:3590-3600. [PMID: 35137492 PMCID: PMC9306916 DOI: 10.1111/jam.15479] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 02/03/2022] [Accepted: 02/04/2022] [Indexed: 11/28/2022]
Abstract
Aim To evaluate the anti‐noroviral efficacy of PURELL® surface sanitizer and disinfectant spray (PSS, an alcohol‐based formulation) using human norovirus GII.4 Sydney [hNoV, by RT‐qPCR and human intestinal enteroid (HIE) infectivity assay] and its cultivable surrogate, Tulane virus (TuV, infectivity assay), compared to sodium hypochlorite (NaOCl) solutions. Methods and Results PSS efficacy was evaluated in suspension and on surfaces [stainless steel (SS)] using ASTM methods. Results were expressed as log10 reduction (LR) of genome equivalent copy number (GEC, for hNoV, assayed by RT‐qPCR) and plaque forming units (PFU, for TuV, per infectivity assay). In suspension, PSS achieved a 2.9 ± 0.04 LR hNoV GEC irrespective of contact time (30 or 60 s) and soil load (2.5% or 5%). Under all treatment conditions, infectious TuV could not be recovered following exposure to PSS, corresponding to the assay limit of detection (3.1–5.2 log10 PFU). Infectious hNoV could not be detected in the HIE model after exposure to PSS. On SS and 2.5% soil, PSS produced a 3.1 ± 0.1 LR hNoV GEC, comparable to 500 ppm NaOCl for 60 s. With 5.0% soil, PSS produced a 2.5 ± 0.2 LR hNoV GEC, which was similar to 1000–5000 ppm NaOCl for 60 s. Conclusions PSS showed high anti‐hNoV efficacy by RT‐qPCR and in in vitro (TuV) and ex vivo (HIE) infectivity assays and performed similar to 1000–5000 ppm NaOCl for a 60‐s contact time on SS with added soil. Significance and Impact of Study hNoV remains a significant cause of morbidity globally, partly due to its resistance to numerous surface disinfectants. RT‐qPCR results from this study indicate PSS efficacy against hNoV is comparable to NaOCl efficacy. Infectivity assays leveraging TuV and the HIE model for hNoV support and confirm loss of virus infectivity. Collectively, these results indicate the product’s ability to inactivate hNoV quickly, which could be beneficial in settings having elevated risk for hNoV transmission.
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Affiliation(s)
- Blanca I Escudero-Abarca
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC
| | - Rebecca M Goulter
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC
| | - Justin Bradshaw
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC.,Current Affiliation: Johnston Community College, Smithfield, NC
| | - Jeremy Faircloth
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC
| | | | | | | | - Lee-Ann Jaykus
- Department of Food, Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC
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14
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Pouillot R, Smith M, Van Doren JM, Catford A, Holtzman J, Calci KR, Edwards R, Goblick G, Roberts C, Stobo J, White J, Woods J, DePaola A, Buenaventura E, Burkhardt W. Risk Assessment of Norovirus Illness from Consumption of Raw Oysters in the United States and in Canada. RISK ANALYSIS : AN OFFICIAL PUBLICATION OF THE SOCIETY FOR RISK ANALYSIS 2022; 42:344-369. [PMID: 34121216 PMCID: PMC9291475 DOI: 10.1111/risa.13755] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 04/20/2021] [Accepted: 04/23/2021] [Indexed: 05/30/2023]
Abstract
Human norovirus (NoV) is the leading cause of foodborne illness in the United States and Canada. Bivalve molluscan shellfish is one commodity commonly identified as being a vector of NoV. Bivalve molluscan shellfish are grown in waters that may be affected by contamination events, tend to bioaccumulate viruses, and are frequently eaten raw. In an effort to better assess the elements that contribute to potential risk of NoV infection and illness from consumption of bivalve molluscan shellfish, the U.S. Department of Health and Human Services/Food and Drug Administration (FDA), Health Canada (HC), the Canadian Food Inspection Agency (CFIA), and Environment and Climate Change Canada (ECCC) collaborated to conduct a quantitative risk assessment for NoV in bivalve molluscan shellfish, notably oysters. This study describes the model and scenarios developed and results obtained to assess the risk of NoV infection and illness from consumption of raw oysters harvested from a quasi-steady-state situation. Among the many factors that influence the risk of NoV illness for raw oyster consumers, the concentrations of NoV in the influent (raw, untreated) and effluent (treated) of wastewater treatment plants (WWTP) were identified to be the most important. Thus, mitigation and control strategies that limit the influence from human waste (WWTP outfalls) in oyster growing areas have a major influence on the risk of illness from consumption of those oysters.
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Affiliation(s)
- Régis Pouillot
- U.S. Food and Drug Administration5001 Campus DriveCollege ParkMD20740USA
| | - Mark Smith
- Health Canada251 Sir Frederick Banting Driveway Tunney's Pasture, Mail Stop 2204EOttawaONK1A 0K9Canada
| | - Jane M. Van Doren
- U.S. Food and Drug Administration5001 Campus DriveCollege ParkMD20740USA
| | - Angela Catford
- Health Canada251 Sir Frederick Banting Driveway Tunney's Pasture, Mail Stop 2204EOttawaONK1A 0K9Canada
| | - Jennifer Holtzman
- Health Canada251 Sir Frederick Banting Driveway Tunney's Pasture, Mail Stop 2204EOttawaONK1A 0K9Canada
| | - Kevin R. Calci
- U.S. Food and Drug AdministrationGulf Coast Seafood LaboratoryDauphin IslandAL36528USA
| | - Robyn Edwards
- Canadian Food Inspection Agency1400 Merivale RoadOttawaONK1A 0Y9Canada
| | - Gregory Goblick
- U.S. Food and Drug AdministrationGulf Coast Seafood LaboratoryDauphin IslandAL36528USA
| | - Christopher Roberts
- Environment and Climate Change Canada45 Alderney Dr, 7th FloorDartmouthNSB2Y 2N6Canada
| | - Jeffrey Stobo
- Environment and Climate Change Canada45 Alderney Dr, 7th FloorDartmouthNSB2Y 2N6Canada
| | - John White
- Canadian Food Inspection Agency57 Central St., Suite 204SummersidePEC1N 3K9Canada
| | - Jacquelina Woods
- U.S. Food and Drug AdministrationGulf Coast Seafood LaboratoryDauphin IslandAL36528USA
| | - Angelo DePaola
- U.S. Food and Drug AdministrationGulf Coast Seafood LaboratoryDauphin IslandAL36528USA
| | - Enrico Buenaventura
- Health Canada251 Sir Frederick Banting Driveway Tunney's Pasture, Mail Stop 2204EOttawaONK1A 0K9Canada
| | - William Burkhardt
- U.S. Food and Drug AdministrationGulf Coast Seafood LaboratoryDauphin IslandAL36528USA
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15
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Moon Y, Han S, Son JW, Park SH, Ha SD. Impact of ultraviolet-C and peroxyacetic acid against murine norovirus on stainless steel and lettuce. Food Control 2021. [DOI: 10.1016/j.foodcont.2021.108378] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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16
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Barnes C, Barber R, Schneider KR, Danyluk MD, Wright AC, Jones MK, Montazeri N. Application of Chitosan Microparticles against Human Norovirus. J Food Prot 2021; 84:2092-2098. [PMID: 34324675 DOI: 10.4315/jfp-21-220] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/24/2021] [Indexed: 11/11/2022]
Abstract
ABSTRACT Human norovirus (HuNoV) is the leading cause of foodborne illness outbreaks and the second most common cause of waterborne infections in the United States. The goal of this research was to investigate the antiviral activity of chitosan microparticles (CMs) against HuNoV GII.4 Sydney and its cultivable surrogate Tulane virus (TuV) in suspensions mimicking fecally contaminated water. CMs were prepared by cross-linking chitosan molecules with sodium sulfate, and the antiviral activity of CMs was assessed with an infectivity assay on TuV and by quantitative reverse transcription PCR on TuV and HuNoV. A 3% CM suspension in phosphate-buffered saline (pH 7.2) bound to TuV particles but had a negligible impact on virus infectivity (P > 0.05). A 10-min contact time resulted in a 1.5-log reduction in genomic copies per mL of TuV and HuNoV in fecal suspensions (P < 0.05). Despite the negligible impact on viral infectivity, CMs can moderately bind to infectious virus particles and help purify environmental water by removing these particles. In this study, TuV was a suitable surrogate for HuNoV with similar log reductions in fecal suspension. These findings highlight the potential application of CM as a novel treatment to minimize the spread of waterborne viral pathogens. HIGHLIGHTS
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Affiliation(s)
- Candace Barnes
- Food Science and Human Nutrition Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida 32611
| | - Rebecca Barber
- Department of Microbiology & Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida 32611
| | - Keith R Schneider
- Food Science and Human Nutrition Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida 32611
| | - Michelle D Danyluk
- Food Science and Human Nutrition Department, Citrus Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Lake Alfred, Florida 33850, USA
| | - Anita C Wright
- Food Science and Human Nutrition Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida 32611
| | - Melissa K Jones
- Department of Microbiology & Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida 32611
| | - Naim Montazeri
- Food Science and Human Nutrition Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, Florida 32611
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17
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Effectiveness of water and sanitizer washing solutions for removing enteric viruses from blueberries. Food Control 2021. [DOI: 10.1016/j.foodcont.2021.108043] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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18
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Aerobic Conditions and Endogenous Reactive Oxygen Species Reduce the Production of Infectious MS2 Phage by Escherichia coli. Viruses 2021; 13:v13071376. [PMID: 34372580 PMCID: PMC8310082 DOI: 10.3390/v13071376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 07/06/2021] [Accepted: 07/12/2021] [Indexed: 11/16/2022] Open
Abstract
Most of the defective/non-infectious enteric phages and viruses that end up in wastewater originate in human feces. Some of the causes of this high level of inactivity at the host stage are unknown. There is a significant gap between how enteric phages are environmentally transmitted and how we might design molecular tools that would only detect infectious ones. Thus, there is a need to explain the low proportion of infectious viral particles once replicated. By analyzing lysis plaque content, we were able to confirm that, under aerobic conditions, Escherichia coli produce low numbers of infectious MS2 phages (I) than the total number of phages indicated by the genome copies (G) with an I/G ratio of around 2%. Anaerobic conditions of replication and ROS inhibition increase the I/G ratio to 8 and 25%, respectively. These data cannot only be explained by variations in the total numbers of MS2 phages produced or in the metabolism of E. coli. We therefore suggest that oxidative damage impacts the molecular replication and assembly of MS2 phages.
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19
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Annous BA, Buckley DA, Kingsley DH. Efficacy of Chlorine Dioxide Gas Against Hepatitis A Virus on Blueberries, Blackberries, Raspberries, and Strawberries. FOOD AND ENVIRONMENTAL VIROLOGY 2021; 13:241-247. [PMID: 33689143 DOI: 10.1007/s12560-021-09465-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 02/02/2021] [Indexed: 06/12/2023]
Abstract
Seeking a means of sanitizing berries, the effectiveness of steady state levels of gaseous chlorine dioxide (ClO2) against hepatitis A virus (HAV) on laboratory-contaminated berries was determined. The generated ClO2 was maintained with 1 or 2 mg/l air inside a 269-l glove box to treat 50 g batches of blueberries, raspberries, and blackberries, and 100 g batches of strawberries that were immersion coated with HAV. Normalized data for ClO2 (ppm-h/g product) is reported as a function of ClO2 concentration, treatment time, and weight of treated product. Treatments of ClO2 ranging from 1.00 to 6.27 ppm-h/g berry were evaluated. When compared to untreated HAV-contaminated berries, log reductions of HAV were > 2.1 for all berry types and conditions tested indicating the gaseous ClO2 was effective. The average log reduction with strawberries, raspberries, blueberries and blackberries treated with 1.00 ppm-h/g, the lowest ClO2 treatment tested, were 2.44, 2.49, 3.23, and 3.45, respectively. The highest treatment of 6.27 ppm-h/g was applied at two different gas concentrations of 1 mg/l and 2 mg/l. Average log reductions for blueberries and strawberries treated with 6.27 ppm-h/g were 4.34 and 4.42, and 4.03 and 3.51, applied at 1 mg/l and 2 mg/l, respectively. For blackberries and raspberries 3.20 and 3.24, and 3.23 and 3.97 log reductions were observed for 6.27 ppm-h/g treatments applied at 1 mg/l and 2 mg/l, respectively. Results indicate that HAV contamination of berries can be substantially reduced by gaseous ClO2 and offer industry a waterless means of sanitizing berries against HAV.
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Affiliation(s)
- Bassam A Annous
- U.S. Department of Agriculture, Agricultural Research Service, Food Safety and Intervention Technologies Research Unit, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, PA, 19038, USA
| | - David A Buckley
- U.S. Department of Agriculture, Agricultural Research Service, Food Safety and Intervention Technologies Research Unit, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, PA, 19038, USA
- Diversey, Inc, 1300 Altura Road, Fort Mill, SC, 29708, USA
| | - David H Kingsley
- U.S. Department of Agriculture, Agricultural Research Service, Food Safety and Intervention Technologies Research Unit, Delaware State University, 1200 North DuPont Hwy, Dover, DE, 19901, USA.
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20
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Chassaing M, Bastin G, Robin M, Majou D, Belliot G, de Rougemont A, Boudaud N, Gantzer C. Free Chlorine and Peroxynitrite Alter the Capsid Structure of Human Norovirus GII.4 and Its Capacity to Bind Histo-Blood Group Antigens. Front Microbiol 2021; 12:662764. [PMID: 33927710 PMCID: PMC8076513 DOI: 10.3389/fmicb.2021.662764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 03/23/2021] [Indexed: 12/02/2022] Open
Abstract
Human noroviruses (HuNoVs) are one of the leading causes of acute gastroenteritis worldwide. HuNoVs are frequently detected in water and foodstuffs. Free chlorine and peroxynitrite (ONOO−) are two oxidants commonly encountered by HuNoVs in humans or in the environment during their natural life cycle. In this study, we defined the effects of these two oxidants on GII.4 HuNoVs and GII.4 virus-like particles (VLPs). The impact on the capsid structure, the major capsid protein VP1 and the ability of the viral capsid to bind to histo-blood group antigens (HBGAs) following oxidative treatments were analyzed. HBGAs are attachment factors that promote HuNoV infection in human hosts. Overall, our results indicate that free chlorine acts on regions involved in the stabilization of VP1 dimers in VLPs and affects their ability to bind to HBGAs. These effects were confirmed in purified HuNoVs. Some VP1 cross-links also take place after free chlorine treatment, albeit to a lesser extent. Not only ONOO− mainly produced VP1 cross-links but can also dissociate VLPs depending on the concentration applied. Nevertheless, ONOO− has less effect on HuNoV particles.
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Affiliation(s)
- Manon Chassaing
- Food Safety Department, ACTALIA, Saint-Lô, France.,Université de Lorraine, CNRS, LCPME, Nancy, France
| | | | - Maëlle Robin
- Food Safety Department, ACTALIA, Saint-Lô, France
| | | | - Gaël Belliot
- National Reference Centre for Gastroenteritis Viruses, Laboratory of Virology, University Hospital of Dijon, Dijon, France.,UMR PAM A 02.102 Procédés Alimentaires et Microbiologiques, Université de Bourgogne Franche-Comté/AgroSup Dijon, Dijon, France
| | - Alexis de Rougemont
- National Reference Centre for Gastroenteritis Viruses, Laboratory of Virology, University Hospital of Dijon, Dijon, France.,UMR PAM A 02.102 Procédés Alimentaires et Microbiologiques, Université de Bourgogne Franche-Comté/AgroSup Dijon, Dijon, France
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21
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Solis-Sanchez D, Rivera-Piza A, Lee S, Kim J, Kim B, Choi JB, Kim YW, Ko GP, Song MJ, Lee SJ. Antiviral Effects of Lindera obtusiloba Leaf Extract on Murine Norovirus-1 (MNV-1), a Human Norovirus Surrogate, and Potential Application to Model Foods. Antibiotics (Basel) 2020; 9:antibiotics9100697. [PMID: 33066532 PMCID: PMC7602249 DOI: 10.3390/antibiotics9100697] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/07/2020] [Accepted: 10/10/2020] [Indexed: 01/14/2023] Open
Abstract
Noroviruses are the leading cause of acute gastroenteritis and food poisoning worldwide. In this study, we investigated the anti-noroviral activity of Lindera obtusiloba leaf extract (LOLE) using murine norovirus (MNV-1), a surrogate of human norovirus. Preincubation of MNV-1 with LOLE at 4, 8, or 12 mg/mL for 1 h at 25 °C significantly reduced viral infectivity, by 51.8%, 64.1%, and 71.2%, respectively. Among LOLE single compounds, β-pinene (49.7%), α-phellandrene (26.2%), and (+)-limonene (17.0%) demonstrated significant inhibitory effects on viral infectivity after pretreatment with MNV-1, suggesting that the anti-noroviral effects of LOLE may be due to the synergetic activity of several compounds, with β-pinene as a key molecule. The inhibitory effect of LOLE was tested on the edible surfaces of lettuce, cabbage, and oysters, as well as on stainless steel. After one hour of incubation at 25°C, LOLE (12 mg/mL) pretreatment significantly reduced MNV-1 plaque formation on lettuce (76.4%), cabbage (60.0%), oyster (38.2%), and stainless-steel (62.8%). These results suggest that LOLE effectively inhibits norovirus on food and metal surfaces. In summary, LOLE, including β-pinene, may inactivate norovirus and could be used as a natural agent promoting food safety and hygiene.
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Affiliation(s)
- Diana Solis-Sanchez
- Department of Biotechnology, School of Life Sciences and Biotechnology for BK21 PLUS, Korea University, Seoul 02841, Korea; (D.S.-S.); (A.R.-P.); (S.L.); (J.K.); (B.K.); (J.B.C.); (Y.W.K.)
| | - Adriana Rivera-Piza
- Department of Biotechnology, School of Life Sciences and Biotechnology for BK21 PLUS, Korea University, Seoul 02841, Korea; (D.S.-S.); (A.R.-P.); (S.L.); (J.K.); (B.K.); (J.B.C.); (Y.W.K.)
| | - Soyoung Lee
- Department of Biotechnology, School of Life Sciences and Biotechnology for BK21 PLUS, Korea University, Seoul 02841, Korea; (D.S.-S.); (A.R.-P.); (S.L.); (J.K.); (B.K.); (J.B.C.); (Y.W.K.)
| | - Jia Kim
- Department of Biotechnology, School of Life Sciences and Biotechnology for BK21 PLUS, Korea University, Seoul 02841, Korea; (D.S.-S.); (A.R.-P.); (S.L.); (J.K.); (B.K.); (J.B.C.); (Y.W.K.)
| | - Bomi Kim
- Department of Biotechnology, School of Life Sciences and Biotechnology for BK21 PLUS, Korea University, Seoul 02841, Korea; (D.S.-S.); (A.R.-P.); (S.L.); (J.K.); (B.K.); (J.B.C.); (Y.W.K.)
| | - Joo Bong Choi
- Department of Biotechnology, School of Life Sciences and Biotechnology for BK21 PLUS, Korea University, Seoul 02841, Korea; (D.S.-S.); (A.R.-P.); (S.L.); (J.K.); (B.K.); (J.B.C.); (Y.W.K.)
| | - Ye Won Kim
- Department of Biotechnology, School of Life Sciences and Biotechnology for BK21 PLUS, Korea University, Seoul 02841, Korea; (D.S.-S.); (A.R.-P.); (S.L.); (J.K.); (B.K.); (J.B.C.); (Y.W.K.)
| | - Gwang Pyo Ko
- Institute of Health and Environment, Department of Environmental Health, Center for Human and Environmental Microbiome, Graduate School of Public Health, Seoul National University, Seoul 151-742, Korea;
| | - Moon Jung Song
- Virus-Host Interactions Laboratory, Department of Biosystems and Biotechnology, Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea;
| | - Sung-Joon Lee
- Department of Biotechnology, School of Life Sciences and Biotechnology for BK21 PLUS, Korea University, Seoul 02841, Korea; (D.S.-S.); (A.R.-P.); (S.L.); (J.K.); (B.K.); (J.B.C.); (Y.W.K.)
- Correspondence: ; Tel.: +82-2-3290-3029
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22
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Escudero-Abarca BI, Goulter RM, Arbogast JW, Leslie RA, Green K, Jaykus LA. Efficacy of alcohol-based hand sanitizers against human norovirus using RNase-RT-qPCR with validation by human intestinal enteroid replication. Lett Appl Microbiol 2020; 71:605-610. [PMID: 32964478 PMCID: PMC7756425 DOI: 10.1111/lam.13393] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/14/2020] [Accepted: 09/14/2020] [Indexed: 12/14/2022]
Abstract
Successful human norovirus (HuNoV) cultivation in stem cell‐derived human intestinal enteroids (HIE) was recently reported. The purpose of this study was to evaluate the anti‐HuNoV efficacy of two alcohol‐based commercial hand sanitizers and 60% ethanol by suspension assay using RNase‐RT‐qPCR, with subsequent validation of efficacy by HuNoV cultivation using the HIE model. In suspension, when evaluated by RNase‐RT‐qPCR, 60% ethanol resulted in less than one log10 reduction in HuNoV genome equivalent copies (GEC) regardless of contact time (30 or 60s) or soil load. The two commercial products outperformed 60% ethanol regardless of contact time or soil load, providing 2·2–3·2 log10 HuNoV GEC reductions by suspension assay. Product B could not be validated in the HIE model due to cytotoxicity. Following a 60s exposure, viral replication in the HIE model increased 1·9 ± 0·2 log10 HuNoV GEC for the neutralization (positive) control and increased 0·9 ± 0·2 log10 HuNoV GEC in challenged HIE after treatment with 60% ethanol. No HuNoV replication in HIE was observed after a 60 s exposure to Product A.
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Affiliation(s)
- B I Escudero-Abarca
- Department of Food Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC, USA
| | - R M Goulter
- Department of Food Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC, USA
| | | | | | - K Green
- GOJO Industries Inc, Akron, OH, USA
| | - L-A Jaykus
- Department of Food Bioprocessing and Nutrition Sciences, North Carolina State University, Raleigh, NC, USA
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23
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Recker JD, Li X. Evaluation of Copper Alloy Surfaces for Inactivation of Tulane Virus and Human Noroviruses. J Food Prot 2020; 83:1782-1788. [PMID: 32991723 DOI: 10.4315/0362-028x.jfp-19-410] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 05/18/2020] [Indexed: 11/11/2022]
Abstract
ABSTRACT This study evaluated the efficacy of copper alloy surfaces for inactivation of Tulane virus (TV), assessed by plaque assay and porcine gastric mucin-conjugated magnetic bead (PGM-MB) binding assay, followed by quantitative reverse transcription PCR (PGM-MB-RT-qPCR assay). In addition, the efficacy of a copper surface for inactivation of human norovirus (HuNoV) GII.4 Sydney and GI.3B Potsdam strains was evaluated by PGM-MB-RT-qPCR assay. Results of time-dependent inactivation of viruses on copper, bronze, and brass coupons revealed that 15 min of surface treatments of each of the copper and copper alloys achieved >4-log reduction of purified TV, as assessed by plaque assay, while up to 20 min of copper alloy surface treatments only achieved ∼2-log reduction, as assessed by PGM-MB-RT-qPCR assay. As assessed by PGM-MB-RT-qPCR assay, 10 min of copper surface treatments achieved reductions of 3 and 4 log units for HuNoVs GII.4 Sydney and GI.3B Potsdam, respectively. Results from this study suggest that even though PGM-MB-RT-qPCR assay underestimated the efficacy of copper alloy surface inactivation of TV, copper alloy surfaces were able to effectively inactivate TV and HuNoVs. Therefore, copper alloys can be used as a preventive measure to prevent HuNoV infection and are an effective surface treatment for HuNoVs. HIGHLIGHTS
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Affiliation(s)
- Jordan D Recker
- Department of Microbiology, University of Wisconsin-La Crosse, La Crosse, Wisconsin 54601, USA
| | - Xinhui Li
- Department of Microbiology, University of Wisconsin-La Crosse, La Crosse, Wisconsin 54601, USA.,(ORCID: https://orcid.org/0000-0003-1568-1999 [X.L.])
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24
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Djebbi-Simmons D, Alhejaili M, Janes M, King J, Xu W. Survival and inactivation of human norovirus GII.4 Sydney on commonly touched airplane cabin surfaces. AIMS Public Health 2020; 7:574-586. [PMID: 32968679 PMCID: PMC7505796 DOI: 10.3934/publichealth.2020046] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 07/13/2020] [Indexed: 02/04/2023] Open
Abstract
Human norovirus (HuNoV) is one of the leading causes of acute gastroenteritis globally. HuNoV outbreaks have been recently reported during air travels. Contaminated surfaces are known as a critical transmission route at various settings. The aim of this study was to provide key information about the survival and the decontamination of HuNoV on three commonly touched airplane cabin surfaces. In this study, we monitored the survival of HuNoV on seat leather, plastic tray table, and seatbelt for 30 days, with and without additional organic load (simulated gastric fluid). The efficacy of two EPA registered anti-norovirus disinfectants were also evaluated. Results showed that HuNoV was detected at high titers (>4 log10 genomic copy number) for up to 30 days when additional organic load was present. Both tested disinfectants were found highly ineffective against HuNoV when the surface was soiled. The study showed that when the organic load was present, HuNoV was highly stable and resistant against disinfectants. Findings from this study indicated that appropriate procedures should be developed by airline companies with the help of public health authorities to decrease passengers' exposure risk to HuNoV.
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Affiliation(s)
- Dorra Djebbi-Simmons
- School of Nutrition and Food Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, USA
| | - Mohammed Alhejaili
- School of Nutrition and Food Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, USA
| | - Marlene Janes
- School of Nutrition and Food Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, USA
| | - Joan King
- School of Nutrition and Food Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, USA
| | - Wenqing Xu
- School of Nutrition and Food Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, USA
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25
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Interaction between norovirus and Histo-Blood Group Antigens: A key to understanding virus transmission and inactivation through treatments? Food Microbiol 2020; 92:103594. [PMID: 32950136 DOI: 10.1016/j.fm.2020.103594] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 06/27/2020] [Accepted: 07/02/2020] [Indexed: 02/06/2023]
Abstract
Human noroviruses (HuNoVs) are a main cause of acute gastroenteritis worldwide. They are frequently involved in foodborne and waterborne outbreaks. Environmental transmission of the virus depends on two main factors: the ability of viral particles to remain infectious and their adhesion capacity onto different surfaces. Until recently, adhesion of viral particles to food matrices was mainly investigated by considering non-specific interactions (e.g. electrostatic, hydrophobic) and there was only limited information about infectious HuNoVs because of the absence of a reliable in vitro HuNoV cultivation system. Many HuNoV strains have now been described as having specific binding interactions with human Histo-Blood Group Antigens (HBGAs) and non-HBGA ligands found in food and the environment. Relevant approaches to the in vitro replication of HuNoVs were also proposed recently. On the basis of the available literature data, this review discusses the opportunities to use this new knowledge to obtain a better understanding of HuNoV transmission to human populations and better evaluate the hazard posed by HuNoVs in foodstuffs and the environment.
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26
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Shimakura H, Gen-Nagata F, Haritani M, Furusaki K, Kato Y, Yamashita-Kawanishi N, Le DT, Tsuzuki M, Tohya Y, Kyuwa S, Saito H, Horimoto T, Onodera T, Haga T. Inactivation of human norovirus and its surrogate by the disinfectant consisting of calcium hydrogen carbonate mesoscopic crystals. FEMS Microbiol Lett 2020; 366:5638871. [PMID: 31758686 DOI: 10.1093/femsle/fnz235] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 11/22/2019] [Indexed: 12/21/2022] Open
Abstract
Human norovirus is one of the major causes of foodborne gastroenteritis, and it can be easily transmitted from infected person, virus-contaminated foods and environmental surfaces. Effective disinfection method is needed to stop the transmission of human norovirus. CAC-717 is a new disinfectant consisting of calcium hydrogen carbonate mesoscopic crystals. We aimed to evaluate the efficacy of CAC-717 against human norovirus. This study used human norovirus derived from fecal specimens and cultured murine norovirus, which is one of the surrogate viruses for human norovirus. The disinfection effect against murine norovirus was estimated by infectivity assay and transmission electron microscopy. The inactivation effect against human norovirus was assessed by reverse transcription polymerase chain reaction. Disinfection effect of CAC-717 against the infectivity of murine norovirus was shown within 100 s after the CAC-717 treatment, presenting the destruction of viral capsids. The treatment of CAC-717 significantly reduced human norovirus genomic RNA (3.25-log reduction) by the presence of the mesoscopic structure of calcium hydrogen carbonate. CAC-717 stably inactivated human norovirus in stool suspensions. The inactivation effect of CAC-717 against human norovirus was less susceptible to organic substances than sodium hypochlorite. CAC-717 would be a useful alternative for disinfecting human norovirus in contaminated environmental surfaces.
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Affiliation(s)
- Hidekatsu Shimakura
- Division of Infection Control and Disease Prevention, Department of Veterinary Medical Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Fumihiro Gen-Nagata
- Division of Biomedical Food Research, National Institute of Health Sciences, 3-25-26 Tonomachi, Kawasaki-ku, Kanagawa 210-9501, Japan
| | - Makoto Haritani
- Research Center for Food Safety, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Koichi Furusaki
- Mineral Activation Technical Research Center, 434 Ohkura, Tamana-shi, Kumamoto 865-0023, Japan
| | - Yusei Kato
- Division of Infection Control and Disease Prevention, Department of Veterinary Medical Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Nanako Yamashita-Kawanishi
- Division of Infection Control and Disease Prevention, Department of Veterinary Medical Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Dung T Le
- Division of Infection Control and Disease Prevention, Department of Veterinary Medical Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Masano Tsuzuki
- Division of Infection Control and Disease Prevention, Department of Veterinary Medical Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Yukinobu Tohya
- Laboratory of Veterinary Microbiology, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan
| | - Shigeru Kyuwa
- Laboratory of Biomedical Science, Department of Veterinary Medical Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Hiroyuki Saito
- Department of Microbiology, Akita Prefectural Research Center for Public Health and Environment, 6-6 Senshu-Kubotamachi, Akita 010-0874, Japan
| | - Taisuke Horimoto
- Laboratory of Veterinary Microbiology, Department of Veterinary Medical Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Takashi Onodera
- Research Center for Food Safety, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Takeshi Haga
- Division of Infection Control and Disease Prevention, Department of Veterinary Medical Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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Jones SL, Gibson KE. Characterization of Polyurethane Foam Environmental Monitoring Tools for the Recovery and Release of Viruses. FOOD AND ENVIRONMENTAL VIROLOGY 2020; 12:158-166. [PMID: 32086770 DOI: 10.1007/s12560-020-09421-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Accepted: 02/12/2020] [Indexed: 06/10/2023]
Abstract
The U.S. FDA Food Safety Modernization Act Preventive Controls for Human Food Rule emphasizes the importance of an effective environmental monitoring (EM) program. This study aims to characterize polyurethane foam (PUF) EM tools-currently used in the food industry for the recovery of bacteria from food contact surfaces-for their efficacy in the release and recovery of human enteric viruses. Two viruses (human norovirus [hNoV] and Tulane virus [TV]) were compared at varying inoculum levels, with two EM tools (PUF swab and sponge), two delayed processing times (24 h and 72 h), and one surface type (stainless steel [SS]). Specifically, the objectives were to (1) determine the ability of PUF devices to release viruses for detection and (2) assess the ability of PUF devices to recover viruses from SS surfaces. For TV release from the sponge, there was a significant difference (p = 0.0064) when compared across inoculum level (105 plaque forming unit [PFU]/sponge vs. 102 PFU/sponge). Release of hNoV at a single inoculum level by PUF sponge and swab was compared resulting in a significant difference (p < 0.0001). Data on recovery of TV from SS surfaces using both the sponge and swab indicate significant differences depending on the inoculum level. Recovery of hNoV from SS surfaces differed significantly (p = 0.0030) between the sponge and swab devices. Overall, the study provides a detailed characterization of two commercially available, PUF-based EM tools, and the differences identified in this study can be used to improve the efficacy of EM tools.
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Affiliation(s)
- Sarah L Jones
- Division of Agriculture, Department of Food Science, University of Arkansas, Fayetteville, AR, 72704, USA
| | - Kristen E Gibson
- Division of Agriculture, Department of Food Science, University of Arkansas, Fayetteville, AR, 72704, USA.
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Imai K, Hagi A, Inoue Y, Amarasiri M, Sano D. Virucidal Efficacy of Olanexidine Gluconate as a Hand Antiseptic Against Human Norovirus. FOOD AND ENVIRONMENTAL VIROLOGY 2020; 12:180-190. [PMID: 32124244 PMCID: PMC7225205 DOI: 10.1007/s12560-020-09422-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 02/24/2020] [Indexed: 05/05/2023]
Abstract
Human noroviruses are the major cause of non-bacterial acute gastroenteritis worldwide. Since no therapeutic agent has been proven to prevent human norovirus infection yet, preventive healthcare interventions to block the infection routes play an important role in infection control. One of the possible infection routes of human noroviruses are through contaminated hands, but no hand antiseptics have been proven effective. Olanexidine gluconate is a new biguanide compound that has already been approved for sale as an antiseptic for the surgical field in Japan. A new hand antiseptic was developed using olanexidine gluconate in this study, and its virucidal efficacy against human noroviruses was evaluated using modified RT-qPCR that can account for genome derived from intact viruses using RNase A and photo-reactive intercalators. We tested the virucidal efficacy of five materials; two olanexidine gluconate antiseptics (hand rub formulation and surgical field formulation), two kinds of ethanol solutions at different pH (approx. 3 or 7), and a base component of olanexidine gluconate hand rub formulation against 11 human norovirus genotypes by culture-independent methods. The infectivity of murine norovirus (MNV), a surrogate for human norovirus, was significantly reduced after use of the antiseptics. The olanexidine gluconate hand rub demonstrated the strongest virucidal efficacy against human norovirus among the five tested materials. This study showed that olanexidine gluconate has the potential to become a strong tool for the prevention of human norovirus infection.
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Affiliation(s)
- Kaoru Imai
- Naruto Research Institute, Research and Development Center, Otsuka Pharmaceutical Factory, Inc., Naruto, Tokushima, 772-8601, Japan
- Department of Frontier Science for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, Aoba 6-6-06, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
| | - Akifumi Hagi
- Naruto Research Institute, Research and Development Center, Otsuka Pharmaceutical Factory, Inc., Naruto, Tokushima, 772-8601, Japan
| | - Yasuhide Inoue
- Naruto Research Institute, Research and Development Center, Otsuka Pharmaceutical Factory, Inc., Naruto, Tokushima, 772-8601, Japan
| | - Mohan Amarasiri
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Aoba 6-6-06, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
| | - Daisuke Sano
- Department of Frontier Science for Advanced Environment, Graduate School of Environmental Studies, Tohoku University, Aoba 6-6-06, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan.
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, Aoba 6-6-06, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan.
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Lin Q, Lim JYC, Xue K, Yew PYM, Owh C, Chee PL, Loh XJ. Sanitizing agents for virus inactivation and disinfection. VIEW 2020; 1:e16. [PMID: 34766164 PMCID: PMC7267133 DOI: 10.1002/viw2.16] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 04/02/2020] [Accepted: 04/05/2020] [Indexed: 01/19/2023] Open
Abstract
Viral epidemics develop from the emergence of new variants of infectious viruses. The lack of effective antiviral treatments for the new viral infections coupled with rapid community spread of the infection often result in major human and financial loss. Viral transmissions can occur via close human-to-human contact or via contacting a contaminated surface. Thus, careful disinfection or sanitization is essential to curtail viral spread. A myriad of disinfectants/sanitizing agents/biocidal agents are available that can inactivate viruses, but their effectiveness is dependent upon many factors such as concentration of agent, reaction time, temperature, and organic load. In this work, we review common commercially available disinfectants agents available on the market and evaluate their effectiveness under various application conditions. In addition, this work also seeks to debunk common myths about viral inactivation and highlight new exciting advances in the development of potential sanitizing agents.
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Affiliation(s)
- Qianyu Lin
- NUS Graduate School for Integrative Sciences and EngineeringNational University of SingaporeSingapore
| | - Jason Y. C. Lim
- Soft Materials DepartmentInstitution of Materials Research and EngineeringAgency for ScienceTechnology and Research (A*STAR)InnovisSingapore
| | - Kun Xue
- Soft Materials DepartmentInstitution of Materials Research and EngineeringAgency for ScienceTechnology and Research (A*STAR)InnovisSingapore
| | - Pek Yin Michelle Yew
- Soft Materials DepartmentInstitution of Materials Research and EngineeringAgency for ScienceTechnology and Research (A*STAR)InnovisSingapore
| | - Cally Owh
- Soft Materials DepartmentInstitution of Materials Research and EngineeringAgency for ScienceTechnology and Research (A*STAR)InnovisSingapore
| | - Pei Lin Chee
- Soft Materials DepartmentInstitution of Materials Research and EngineeringAgency for ScienceTechnology and Research (A*STAR)InnovisSingapore
| | - Xian Jun Loh
- Soft Materials DepartmentInstitution of Materials Research and EngineeringAgency for ScienceTechnology and Research (A*STAR)InnovisSingapore
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A Survey of Analytical Techniques for Noroviruses. Foods 2020; 9:foods9030318. [PMID: 32164213 PMCID: PMC7142446 DOI: 10.3390/foods9030318] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/07/2020] [Accepted: 03/07/2020] [Indexed: 12/17/2022] Open
Abstract
As the leading cause of acute gastroenteritis worldwide, human noroviruses (HuNoVs) have caused around 685 million cases of infection and nearly $60 billion in losses every year. Despite their highly contagious nature, an effective vaccine for HuNoVs has yet to become commercially available. Therefore, rapid detection and subtyping of noroviruses is crucial for preventing viral spread. Over the past half century, there has been monumental progress in the development of techniques for the detection and analysis of noroviruses. However, currently no rapid, portable assays are available to detect and subtype infectious HuNoVs. The purpose of this review is to survey and present different analytical techniques for the detection and characterization of noroviruses.
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Ciofi-Silva C, Bruna C, Carmona R, Almeida A, Santos F, Inada N, Bagnato V, Graziano K. Norovirus recovery from floors and air after various decontamination protocols. J Hosp Infect 2019; 103:328-334. [DOI: 10.1016/j.jhin.2019.05.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Accepted: 05/27/2019] [Indexed: 02/02/2023]
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Kingsley DH, Annous BA. Evaluation of Steady-State Gaseous Chlorine Dioxide Treatment for the Inactivation of Tulane virus on Berry Fruits. FOOD AND ENVIRONMENTAL VIROLOGY 2019; 11:214-219. [PMID: 30949936 DOI: 10.1007/s12560-019-09382-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 03/18/2019] [Indexed: 05/20/2023]
Abstract
The effectiveness of steady-state levels of gaseous chlorine dioxide (ClO2) against Tulane virus (TV), a human norovirus surrogate, on berries was determined. The generated ClO2 was maintained at 1 mg/L inside a 269 L glove box to treat two 50 g batches of blueberries, raspberries, and blackberries, and two 100 g batches of strawberries that were immersion coated with TV. The standardized/normalized treatment concentrations of ClO2 ranging from 0.63 to 4.40 ppm-h/g berry were evaluated. When compared to untreated TV contaminated berries, log reductions of TV were in excess of 2.9 log PFU/g for all berry types and conditions tested, indicating that ClO2 was highly effective. In general, the efficacy of all ClO2 treatments on log reductions of TV on all berries was not significantly different (p < 0.05). The average log reduction with strawberries, raspberries, blueberries, and blackberries, treated with the lowest ClO2 concentration, 0.63 ppm-h/g, were 2.98, 3.40, 3.82, and 4.17 log PFU/g, respectively. Overall results suggest that constant levels of ClO2 could be quite effective against foodborne viruses.
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Affiliation(s)
- David H Kingsley
- Food Safety and Intervention Technologies Research Unit, U.S. Department of Agriculture, Agricultural Research Service, Delaware State University, 1200 DuPont Hwy, Dover, DE, 19901, USA
| | - Bassam A Annous
- Food Safety and Intervention Technologies Research Unit, U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, PA, 19038, USA.
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Dunkin N, Coulter C, Weng S, Jacangelo JG, Schwab KJ. Effects of pH Variability on Peracetic Acid Reduction of Human Norovirus GI, GII RNA, and Infectivity Plus RNA Reduction of Selected Surrogates. FOOD AND ENVIRONMENTAL VIROLOGY 2019; 11:76-89. [PMID: 30430442 DOI: 10.1007/s12560-018-9359-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Accepted: 11/07/2018] [Indexed: 06/09/2023]
Abstract
With increasing interest in peracetic acid (PAA) as a disinfectant in water treatment processes, this study determined PAA treatment effects on human noroviruses (hNoVs) genotype I (GI) and genotype II (GII) as well as effects on bacteriophage MS2 and murine norovirus (MNV) in relation to pH. Across all pH conditions, PAA achieved between 0.2 and 2.5 log10 reduction of hNoVs over 120 min contact time in buffer solution as measured by reverse transcription-qPCR (RT-qPCR). The PAA treatments produced similar RT-qPCR reductions of MS2 and MNV, in the range of 0.2-2.7 log10. Infectivity assays achieved > 4 log10 reduction of both MS2 and MNV in buffer solution after 120 min contact time. Comparing PAA activity across varying pH, disinfection at pH 8.5, in general, resulted in less reduction of infectivity and molecular signals compared to pH conditions of 6.5 and 7.5. This difference was most pronounced for reductions in infectivity of MNV and MS2, with as much as 2.7 log10 less reduction at pH 8.5 relative to lower pH conditions. This study revealed that PAA was an effective disinfectant for treatment of hNoV GI and GII, MS2 and MNV, with greatest virus reduction observed for MS2 and MNV infectivity. RT-qPCR reductions of MS2 and MNV were lower than concurrent MS2 and MNV infectivity reductions, suggesting that observed hNoV RT-qPCR reductions may underestimate reductions in hNoV infectivity achieved by PAA. Although virus disinfection by PAA occurred at all evaluated pH levels, PAA is most effective at pH 6.5-7.5.
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Affiliation(s)
- Nathan Dunkin
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Caroline Coulter
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - ShihChi Weng
- JHU/Stantec Alliance, Johns Hopkins University, Baltimore, MD, USA
| | - Joseph G Jacangelo
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
- JHU/Stantec Alliance, Johns Hopkins University, Baltimore, MD, USA
- MWH-Stantec, Pasadena, CA, USA
| | - Kellogg J Schwab
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA.
- JHU/Stantec Alliance, Johns Hopkins University, Baltimore, MD, USA.
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Iloghalu U, Holmes B, Khatiwada J, Williams LL. Selected Plant Extracts Show Antiviral Effects against Murine Norovirus Surrogate. ACTA ACUST UNITED AC 2019. [DOI: 10.4236/aim.2019.94022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Yamashiro R, Misawa T, Sakudo A. Key role of singlet oxygen and peroxynitrite in viral RNA damage during virucidal effect of plasma torch on feline calicivirus. Sci Rep 2018; 8:17947. [PMID: 30560882 PMCID: PMC6298994 DOI: 10.1038/s41598-018-36779-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 11/26/2018] [Indexed: 12/25/2022] Open
Abstract
A dielectric barrier discharge (DBD) plasma torch has been used to evaluate the mechanism underlying inactivation of feline calicivirus (FCV) by plasma treatment. Plasma treatment of cell lysate infected with FCV F9 strain reduced the viral titer of the median tissue culture infectious dose (TCID50). The D value (treatment time required to lower the viral titer to 1/10) was 0.450 min, while the viral titer dropped below the detection limit within 2 min. FCV was not significantly inactivated by heat or UV applied at levels corresponding to those generated from the DBD plasma torch after 2 min (38.4 °C and 46.79 mJ/cm2 UV, respectively). However, TCID50 was reduced by 2.47 log after exposure to 4.62 mM ONOO−, corresponding to the concentration generated after 2 min of plasma treatment. Radical scavengers, including superoxide dismutase, dimethyl sulfoxide, and catalase, did not significantly affect viral titers; however, sodium azide, uric acid, and ascorbic acid, which are scavengers of 1O2 radicals, ONOO−, and peroxynitrous acid (ONOOH; produced from ONOO− under acidic conditions), respectively, significantly increased TCID50 and intact viral RNA. These findings suggest that ONOO− and 1O2 play an important role in FCV inactivation by attacking viral RNA during DBD plasma torch treatment.
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Affiliation(s)
- Risa Yamashiro
- Laboratory of Biometabolic Chemistry, School of Health Sciences, University of the Ryukyus, Nishihara, Okinawa, 903-0215, Japan
| | - Tatsuya Misawa
- Department of Electrical and Electronic Engineering, Faculty of Science and Engineering, Saga University, Saga, 840-8502, Japan
| | - Akikazu Sakudo
- Laboratory of Biometabolic Chemistry, School of Health Sciences, University of the Ryukyus, Nishihara, Okinawa, 903-0215, Japan.
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Manuel CS, Moore MD, Jaykus LA. Predicting human norovirus infectivity - Recent advances and continued challenges. Food Microbiol 2018; 76:337-345. [DOI: 10.1016/j.fm.2018.06.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 05/17/2018] [Accepted: 06/24/2018] [Indexed: 01/06/2023]
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A bioassay-based protocol for chemical neutralization of human faecal wastes treated by physico-chemical disinfection processes: A case study on benzalkonium chloride. Int J Hyg Environ Health 2018; 222:155-167. [PMID: 30424942 PMCID: PMC7172796 DOI: 10.1016/j.ijheh.2018.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 06/28/2018] [Accepted: 07/03/2018] [Indexed: 11/21/2022]
Abstract
In situ physico-chemical disinfection of high risk faecal waste is both effective and widely used as a sanitation management strategy for infection prevention and control. Systematic tests where the performance of alternative physico-chemical disinfection methods is systematically compared and optimized must be based on reliable protocols. These protocol are currently not adequately addressing the neutralization related issues: the neutralization of the tested disinfectant after specified conditions of concentration and contact time (CT) is necessary to prevent continued disinfection after the intended contact time; moreover such neutralization is often necessary in practice and on a large scale to prevent adverse health and ecological impacts from remaining disinfectant after the target CT is achieved. Few studies adequately assess the extent of neutralization of the chemical disinfectant and are intended to optimize on-site disinfection practices for waste matrices posing high microbial risks. Hence, there is a need for effective and reproducible neutralization protocols in chemical disinfection trials and practice. Furthermore, for most of chemical disinfectants used in healthcare settings there is no practical methodology to reliably and conveniently measure the residual disinfectant concentration after its neutralization and also determine the optimum concentration of the neutralizer. Because some neutralizing compounds can themselves be toxic to the test microorganisms, it is necessary to optimize neutralization procedures in disinfection experiments for the development of infection control practices using accepted positive control microbes. In the presented work, a stepwise bioassay-based protocol using representative faecal indicator microbes is described for optimizing chemical disinfection and subsequent disinfectant neutralization of any infectious faecal waste matrix. The example described is for the quaternary ammonium compound benzalkonium chloride and its recommended chemical neutralizer in a high strength human faecal waste matrix.
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Immunomagnetic separation combined with RT-qPCR for evaluating the effect of disinfectant treatments against norovirus on food contact surfaces. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.06.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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40
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Jeong MI, Park SY, Ha SD. Effects of sodium hypochlorite and peroxyacetic acid on the inactivation of murine norovirus-1 in Chinese cabbage and green onion. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.06.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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41
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Disinfectant testing against human norovirus surrogates-What infection preventionists need to know. Infect Control Hosp Epidemiol 2018; 39:1388-1389. [PMID: 30168401 DOI: 10.1017/ice.2018.210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Dunkin N, Weng S, Coulter CG, Jacangelo JG, Schwab KJ. Impacts of virus processing on human norovirus GI and GII persistence during disinfection of municipal secondary wastewater effluent. WATER RESEARCH 2018; 134:1-12. [PMID: 29407643 DOI: 10.1016/j.watres.2018.01.053] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 01/20/2018] [Accepted: 01/22/2018] [Indexed: 05/03/2023]
Abstract
Noroviruses cause significant global health burdens and waterborne transmission is a known exposure pathway. Chlorination is the most common method of disinfection for water and wastewater worldwide. The purpose of this study was to investigate the underlying causes for discrepancies in human norovirus (hNoV) resistance to free chlorine that have been previously published, and to assess hNoV GI and GII persistence during disinfection of municipal secondary wastewater (WW) effluent. Our results reveal that choice of hNoV purification methodology prior to seeding the viruses in an experimental water matrix influences disinfection outcomes in treatment studies. Common hNoV purification processes such as solvent extraction and 0.45-μm filtration were ineffective in removing high levels of organics introduced into water or wastewater samples when seeding norovirus positive stool. These methods resulted in experimental water matrices receiving an additional 190 mg/L as Cl2 of 15-s chlorine demand and approximately 440 mg/L as Cl2 of 30-min chlorine demand due to seeding norovirus positive stool at 1% w/v. These high organic loads impact experimental water chemistry and bias estimations of hNoV persistence. Advanced purification of norovirus positive stool using sucrose cushion ultracentrifugation and ultrafiltration reduced 15-s chlorine demands by 99% and TOC by 93% for loose (i.e. unformed diarrhea) stools. Using these methods, hNoV GI and GII persistence was investigated during free chlorination of municipal WW. A suite five of kinetic inactivation models was fit to viral reverse transcription-qPCR reduction data, and model predicted CT values for 1, 2, and 3 log10 reduction of hNoV GI in municipal WW by free chlorine were 0.3, 2.1, and 7.8 mg-min/L, respectively. Model predicted CT values for reduction of hNoV GII in WW were 0.4, 2.0, and 7.0 mg-min/L, respectively. These results indicate that current WW treatment plant disinfection practices employing free chlorine are likely protective for public health with regards to noroviruses, and will achieve at least 3-log reduction of hNoV GI and GII RNA despite previous reports of high hNoV resistance.
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Affiliation(s)
- Nathan Dunkin
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - ShihChi Weng
- JHU/MWH Alliance, Johns Hopkins University, Baltimore, MD, USA
| | - Caroline G Coulter
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Joseph G Jacangelo
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA; JHU/MWH Alliance, Johns Hopkins University, Baltimore, MD, USA; MWH-Stantec, Pasadena, CA, USA
| | - Kellogg J Schwab
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA; JHU/MWH Alliance, Johns Hopkins University, Baltimore, MD, USA.
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Kampf G. Efficacy of ethanol against viruses in hand disinfection. J Hosp Infect 2018; 98:331-338. [PMID: 28882643 PMCID: PMC7132458 DOI: 10.1016/j.jhin.2017.08.025] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 06/26/2017] [Accepted: 08/31/2017] [Indexed: 12/12/2022]
Abstract
Ethanol is used worldwide in healthcare facilities for hand rubbing. It has been reported to have a stronger and broader virucidal activity compared with propanols. The aim of this review was to describe the spectrum of virucidal activity of ethanol in solution or as commercially available products. A systematic search was conducted. Studies were selected when they contained original data on reduction of viral infectivity from suspension tests (49 studies) and contaminated hands (17 studies). Ethanol at 80% was highly effective against all 21 tested, enveloped viruses within 30 s. Murine norovirus and adenovirus type 5 are usually inactivated by ethanol between 70% and 90% in 30 s whereas poliovirus type 1 was often found to be too resistant except for ethanol at 95% (all test viruses of EN 14476). Ethanol at 80% is unlikely to be sufficiently effective against poliovirus, calicivirus (FCV), polyomavirus, hepatitis A virus (HAV) and foot-and-mouth disease virus (FMDV). The spectrum of virucidal activity of ethanol at 95%, however, covers the majority of clinically relevant viruses. Additional acids can substantially improve the virucidal activity of ethanol at lower concentrations against, e.g. poliovirus, FCV, polyomavirus and FMDV although selected viruses such as HAV may still be too resistant. The selection of a suitable virucidal hand rub should be based on the viruses most prevalent in a unit and on the user acceptability of the product under frequent-use conditions.
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Affiliation(s)
- G Kampf
- University Medicine Greifswald, Institute for Hygiene and Environmental Medicine, Greifswald, Germany.
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Amarasiri M, Kitajima M, Miyamura A, Santos R, Monteiro S, Miura T, Kazama S, Okabe S, Sano D. Reverse transcription-quantitative PCR assays for genotype-specific detection of human noroviruses in clinical and environmental samples. Int J Hyg Environ Health 2018; 221:578-585. [DOI: 10.1016/j.ijheh.2018.02.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 02/20/2018] [Accepted: 02/20/2018] [Indexed: 12/13/2022]
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Aboubakr HA, Mor SK, Higgins L, Armien A, Youssef MM, Bruggeman PJ, Goyal SM. Cold argon-oxygen plasma species oxidize and disintegrate capsid protein of feline calicivirus. PLoS One 2018; 13:e0194618. [PMID: 29566061 PMCID: PMC5864060 DOI: 10.1371/journal.pone.0194618] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 03/06/2018] [Indexed: 11/18/2022] Open
Abstract
Possible mechanisms that lead to inactivation of feline calicivirus (FCV) by cold atmospheric-pressure plasma (CAP) generated in 99% argon-1% O2 admixture were studied. We evaluated the impact of CAP exposure on the FCV viral capsid protein and RNA employing several cultural, molecular, proteomic and morphologic characteristics techniques. In the case of long exposure (2 min) to CAP, the reactive species of CAP strongly oxidized the major domains of the viral capsid protein (VP1) leading to disintegration of a majority of viral capsids. In the case of short exposure (15 s), some of the virus particles retained their capsid structure undamaged but failed to infect the host cells in vitro. In the latter virus particles, CAP exposure led to the oxidation of specific amino acids located in functional peptide residues in the P2 subdomain of the protrusion (P) domain, the dimeric interface region of VP1 dimers, and the movable hinge region linking the S and P domains. These regions of the capsid are known to play an essential role in the attachment and entry of the virus to the host cell. These observations suggest that the oxidative effect of CAP species inactivates the virus by hindering virus attachment and entry into the host cell. Furthermore, we found that the oxidative impact of plasma species led to oxidation and damage of viral RNA once it becomes unpacked due to capsid destruction. The latter effect most likely plays a secondary role in virus inactivation since the intact FCV genome is infectious even after damage to the capsid.
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Affiliation(s)
- Hamada A. Aboubakr
- Department of Veterinary Population Medicine and Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States of America
- Food Science and Technology Department, Faculty of Agriculture, Alexandria University, Aflaton St, El-Shatby, Alexandria, Egypt
| | - Sunil K. Mor
- Department of Veterinary Population Medicine and Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States of America
| | - LeeAnn Higgins
- Department of Biochemistry, Molecular Biology, and Biophysics & Proteomics Center for Mass Spectrometry, University of Minnesota, St. Paul, MN, United States of America
| | - Anibal Armien
- Department of Veterinary Population Medicine and Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States of America
| | - Mohammed M. Youssef
- Food Science and Technology Department, Faculty of Agriculture, Alexandria University, Aflaton St, El-Shatby, Alexandria, Egypt
| | - Peter J. Bruggeman
- Department of Mechanical Engineering, College of Science and Engineering, University of Minnesota, Minneapolis, MN, United States of America
| | - Sagar M. Goyal
- Department of Veterinary Population Medicine and Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, United States of America
- * E-mail:
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Virucidal or Not Virucidal? That Is the Question-Predictability of Ionic Liquid's Virucidal Potential in Biological Test Systems. Int J Mol Sci 2018. [PMID: 29522483 PMCID: PMC5877651 DOI: 10.3390/ijms19030790] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
For three decades now, ionic liquids (ILs), organic salts comprising only ions, have emerged as a new class of pharmaceuticals. Although recognition of the antimicrobial effects of ILs is growing rapidly, there is almost nothing known about their possible virucidal activities. This probably reflects the paucity of understanding virus inactivation. In this study, we performed a systematic analysis to determine the effect of specific structural motifs of ILs on three different biological test systems (viruses, bacteria and enzymes). Overall, the effects of 27 different ILs on two non-enveloped and one enveloped virus (P100, MS2 and Phi6), two Gram negative and one Gram positive bacteria (E. coli, P. syringae and L. monocytogenes) and one enzyme (Taq DNA polymerase) were investigated. Results show that while some ILs were virucidal, no clear structure activity relationships (SARs) could be identified for the non-enveloped viruses P100 and MS2. However, for the first time, a correlation has been demonstrated between the effects of ILs on enveloped viruses, bacteria and enzyme inhibition. These identified SARs serve as a sound starting point for further studies.
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Kingsley DH, Pérez-Pérez RE, Niemira BA, Fan X. Evaluation of gaseous chlorine dioxide for the inactivation of Tulane virus on blueberries. Int J Food Microbiol 2018; 273:28-32. [PMID: 29558681 DOI: 10.1016/j.ijfoodmicro.2018.01.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 01/19/2018] [Accepted: 01/30/2018] [Indexed: 11/18/2022]
Abstract
To determine the effectiveness of gaseous chlorine dioxide (gClO2) against a human norovirus surrogate on produce, gClO2 was generated and applied to Tulane virus-coated blueberries in a 240 ml-treatment chamber. gClO2 was produced by an acidifying sodium chlorite solution. Initial assessments indicated that blueberries treated with gClO2 generated from ≤1 mg acidified sodium chlorite in the small chamber appeared unaffected while gClO2 generated from ≥10 mg of acidified sodium chlorite solution altered the appearance and quality of the blueberries. Treatments of inoculated blueberries with gClO2 generated from 0.1 mg sodium chlorite reduced the virus populations by >1 log after exposure for 30 to 330 min. For the 1 mg sodium chlorite treatments, the virus populations were reduced by >2.2 log after 15 min exposure and to non-detectable levels (>3.3 logs reductions) after 180 min exposure. Measured concentrations of gClO2 peaked in the treatment chamber at 0.9 μg/l after 10 min for 0.1 mg treatments and 600 μg/l after around 20 min for 1 mg treatment. Overall results indicate that gClO2 could be a feasible waterless intervention for blueberries and other produce.
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Affiliation(s)
- David H Kingsley
- USDA ARS ERRC Food Safety & Intervention Technologies Research Unit, Delaware State University, Dover, DE, United States.
| | - Rafael E Pérez-Pérez
- USDA ARS ERRC Food Safety & Intervention Technologies Research Unit, Delaware State University, Dover, DE, United States
| | - Brendan A Niemira
- USDA ARS ERRC Food Safety & Intervention Technologies Research Unit, Wyndmoor, PA, United States
| | - Xuetong Fan
- USDA ARS ERRC Chemical Residue and Predictive Microbiology Research Unit, Wyndmoor, PA, United States
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Evaluation of Chlorine Treatment Levels for Inactivation of Human Norovirus and MS2 Bacteriophage during Sewage Treatment. Appl Environ Microbiol 2017; 83:AEM.01270-17. [PMID: 28939600 DOI: 10.1128/aem.01270-17] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Accepted: 08/31/2017] [Indexed: 11/20/2022] Open
Abstract
This study examined the inactivation of human norovirus (HuNoV) GI.1 and GII.4 by chlorine under conditions mimicking sewage treatment. Using a porcine gastric mucin-magnetic bead (PGM-MB) assay, no statistically significant loss in HuNoV binding (inactivation) was observed for secondary effluent treatments of ≤25 ppm total chlorine; for both strains, 50 and 100 ppm treatments resulted in ≤0.8-log10 unit and ≥3.9-log10 unit reductions, respectively. Treatments of 10, 25, 50, and 100 ppm chlorine inactivated 0.31, 1.35, >5, and >5 log10 units, respectively, of the norovirus indicator MS2 bacteriophage. Evaluation of treatment time indicated that the vast majority of MS2 and HuNoV inactivation occurred in the first 5 min for 0.2-μm-filtered, prechlorinated secondary effluent. Free chlorine measurements of secondary effluent seeded with MS2 and HuNoV demonstrated substantial oxidative burdens. With 25, 50, and 100 ppm treatments, free chlorine levels after 5 min of exposure ranged from 0.21 to 0.58 ppm, from 0.28 to 16.7 ppm, and from 11.6 to 53 ppm, respectively. At chlorine treatment levels of >50 ppm, statistically significant differences were observed between reductions for PGM-MB-bound HuNoV (potentially infectious) particles and those for unbound (noninfectious) HuNoV particles or total norovirus particles. While results suggested that MS2 and HuNoV (measured as PGM-MB binding) behave similarly, although not identically, both have limited susceptibility to chlorine treatments of ≤25 ppm total chlorine. Since sewage treatment is performed at ≤25 ppm total chlorine, targeting free chlorine levels of 0.5 to 1.0 ppm, these results suggest that traditional chlorine-based sewage treatment does not inactivate HuNoV efficiently.IMPORTANCE HuNoV is ubiquitous in sewage. A receptor binding assay was used to assess inactivation of HuNoV by chlorine-based sewage treatment, given that the virus cannot be routinely propagated in vitro Results reported here indicate that chlorine treatment of sewage is not effective for inactivating HuNoV unless chlorine levels are above those routinely used for sewage treatment.
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49
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Dunkin N, Weng S, Jacangelo JG, Schwab KJ. Inactivation of Human Norovirus Genogroups I and II and Surrogates by Free Chlorine in Postharvest Leafy Green Wash Water. Appl Environ Microbiol 2017; 83:e01457-17. [PMID: 28887415 PMCID: PMC5666131 DOI: 10.1128/aem.01457-17] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 09/06/2017] [Indexed: 11/20/2022] Open
Abstract
Human noroviruses (hNoVs) are a known public health concern associated with the consumption of leafy green vegetables. While a number of studies have investigated pathogen reduction on the surfaces of leafy greens during the postharvest washing process, there remains a paucity of data on the level of treatment needed to inactivate viruses in the wash water, which is critical for preventing cross-contamination. The objective of this study was to quantify the susceptibility of hNoV genotype I (GI), hNoV GII, murine norovirus (MNV), and bacteriophage MS2 to free chlorine in whole leaf, chopped romaine, and shredded iceberg lettuce industrial leafy green wash waters, each sampled three times over a 4-month period. A suite of kinetic inactivation models was fit to the viral reduction data to aid in quantification of concentration-time (CT) values. Results indicate that 3-log10 infectivity reduction was achieved at CT values of less than 0.2 mg · min/liter for MNV and 2.5 mg · min/liter for MS2 in all wash water types. CT values for 2-log10 molecular reduction of hNoV GI in whole leaf and chopped romaine wash waters were 1.5 and 0.9 mg · min/liter, respectively. For hNoV GII, CT values were 13.0 and 7.5 mg · min/liter, respectively. In shredded iceberg wash water, 3-log10 molecular reduction was not observed for any virus over the time course of experiments. These findings demonstrate that noroviruses may exhibit genogroup-dependent resistance to free chlorine and emphasize the importance of distinguishing between genogroups in hNoV persistence studies.IMPORTANCE Postharvest washing of millions of pounds of leafy greens is performed daily in industrial processing facilities with the intention of removing dirt, debris, and pathogenic microorganisms prior to packaging. Modest inactivation of pathogenic microorganisms (less than 2 log10) is known to occur on the surfaces of leafy greens during washing. Therefore, the primary purpose of the sanitizing agent is to maintain microbial quality of postharvest processing water in order to limit cross-contamination. This study modeled viral inactivation data and quantified the free-chlorine CT values that processing facilities must meet in order to achieve the desired level of hNoV GI and GII reduction. Disinfection experiments were conducted in industrial leafy green wash water collected from a full-scale fresh produce processing facility in the United States, and hNoV GI and GII results were compared with surrogate molecular and infectivity data.
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Affiliation(s)
- Nathan Dunkin
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA
| | - ShihChi Weng
- JHU/MWH-Stantec Alliance, Johns Hopkins University, Baltimore, Maryland, USA
| | - Joseph G Jacangelo
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA
- JHU/MWH-Stantec Alliance, Johns Hopkins University, Baltimore, Maryland, USA
- MWH-Stantec, Pasadena, California, USA
| | - Kellogg J Schwab
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, USA
- JHU/MWH-Stantec Alliance, Johns Hopkins University, Baltimore, Maryland, USA
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50
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Dunkin N, Weng S, Coulter CG, Jacangelo JG, Schwab KJ. Reduction of Human Norovirus GI, GII, and Surrogates by Peracetic Acid and Monochloramine in Municipal Secondary Wastewater Effluent. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:11918-11927. [PMID: 28910089 DOI: 10.1021/acs.est.7b02954] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The objective of this study was to characterize human norovirus (hNoV) GI and GII reductions during disinfection by peracetic acid (PAA) and monochloramine in secondary wastewater (WW) and phosphate buffer (PB) as assessed by reverse transcription-qPCR (RT-qPCR). Infectivity and RT-qPCR reductions are also presented for surrogate viruses murine norovirus (MNV) and bacteriophage MS2 under identical experimental conditions to aid in interpretation of hNoV molecular data. In WW, RT-qPCR reductions were less than 0.5 log10 for all viruses at concentration-time (CT) values up to 450 mg-min/L except for hNoV GI, where 1 log10 reduction was observed at CT values of less than 50 mg-min/L for monochloramine and 200 mg-min/L for PAA. In PB, hNoV GI and MNV exhibited comparable resistance to PAA and monochloramine with CT values for 2 log10 RT-qPCR reduction between 300 and 360 mg-min/L. Less than 1 log10 reduction was observed for MS2 and hNoV GII in PB at CT values for both disinfectants up to 450 mg-min/L. Our results indicate that hNoVs exhibit genogroup dependent resistance and that disinfection practices targeting hNoV GII will result in equivalent or greater reductions for hNoV GI. These data provide valuable comparisons between hNoV and surrogate molecular signals that can begin the process of informing regulators and engineers on WW treatment plant design and operational practices necessary to inactivate hNoVs.
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Affiliation(s)
- Nathan Dunkin
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University , Baltimore, Maryland 21205, United States
| | - ShihChi Weng
- JHU/MWH-Stantec Alliance, Johns Hopkins University, Baltimore, Maryland 21205, United States
| | - Caroline G Coulter
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University , Baltimore, Maryland 21205, United States
| | - Joseph G Jacangelo
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University , Baltimore, Maryland 21205, United States
- JHU/MWH-Stantec Alliance, Johns Hopkins University, Baltimore, Maryland 21205, United States
- MWH-Stantec , Pasadena, California 91101, United States
| | - Kellogg J Schwab
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University , Baltimore, Maryland 21205, United States
- JHU/MWH-Stantec Alliance, Johns Hopkins University, Baltimore, Maryland 21205, United States
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