2.1 Enzymatic pretreatments for detection of damaged capsid/loss of infectivity
2.2 Labelling with biotin hydrazide for detection of oxidatively damaged viral capsids
2.3 Pretreatment with intercalating dyes followed by molecular assays for infectivity determination
2.4 Porcine gastric mucin (PGM) as a method for selective binding of intact viral capsids
2.5 Other binding-based infectivity assays
2.6 Cell-culture combinations with molecular based detection (RT-PCR)
3.0 Use of cultivable surrogates for the determination of human norovirus (HuNoV) infectivity
3.1 Feline calicivirus as a cultivable HuNoV surrogate to determine infectivity
3.2 Murine norovirus as a cultivable surrogate for HuNoV
3.3 Tulane virus as a cultivable surrogate to determine HuNoV infectivity
3.4 Porcine sapovirus as a cultivable HuNoV surrogate to determine infectivity
3.5 Virus-Like particles as surrogates
4.0 Animal models and human feeding studies
4.1 Animal models
4.2 Feeding studies/Human challenge studies
5.0 Summary and conclusions
6.0 References
13. Survival of Enteric Viruses in the Environment and Food
G. Sánchez, A. Bosch
1.0 Introduction
2.0 Methods to study virus persistence in food and the environment
3.0 Virus persistence in the environment
3.1 Virus persistence in environmental waters
3.2 Virus persistence in soil
3.3 Virus persistence in aerosols
3.4 Virus persistence on fomites
3.5 Virus persistence on hands
4.0 Stability of enteric viruses in food products
4.1 Stability of enteric viruses on chilled products
4.2 Stability of enteric viruses under frozen storage
4.3 Effects of relative humidity on enteric virus persistence
4.4 Stability of enteric viruses on dried food products
4.5 Stability of enteric viruses under modified atmosphere packaging
4.6 Effects of acidification on enteric virus survival
5.0 Conclusions
6.0 References
14. Using Microbicidal Chemicals to Interrupt the Spread of Foodborne Viruses
Syed A. Sattar, Sabah Bidawid
1.0 Introduction
2.0 Basic considerations
3.0 Test methodologies to determine virucidal activity
4.0 Factors in testing virucidal activity
4.1 Test viruses
4.2 Nature and design of carriers
4.2.1 Environmental surfaces
4.2.2 Food items
4.2.3 Hands
4.3 Nature and level of soil loading
4.4 Time and temperature for virus-microbicide contact
4.5 Elimination of Cytotoxicity
4.6 Neutralization of virucidal activity
4.7 Quantitation of virus infectivity
4.8 Number of test and control carriers
4.9 Product performance criteria
5.0 Currently available tests
5.1 Quantitative suspension tests
5.2 Quantitative carrier tests
6.0 Practical aspects of testing microbicides
6.1 Hepatitis A virus strain HM-175 (ATCC VR-1402)
6.2 Feline calicivirus strain F9 (ATCC VR-782)
6.3 Murine norovirus type 1 (Strain S99)
6.4 Human rotavirus - WA strain (ATCC VR-2018)
6.5 Additional Controls in virucidal Tests
7.0 Microbicides in environmental control of foodborne viruses
8.0 Concluding remarks
9.0 References
15. Virus Inactivation During Food Processing
Alvin Lee, Stephen Grove
1.0 Introduction
2.0 Nonthermal preservation processes
2.1 High pressure processing
2.1.1 Pressure effects on viruses
2.1.2. Comparison of HPP inactivation of various human norovirus surrogates
2.1.3 Oyster and bivalve mollusks processing
2.2 Irradiation
2.3 Pulsed electric field
2.4 High-intensity pulsed light
2.5 High power ultrasound
3.0 Sanitizers used in food processing
3.1 Chlorine
3.2 Organic acid based sanitizers
3.3 Electrolyzed water
3.4 Chlorine dioxide
4.0 Summary and conclusions
4.2 References
16. Natural Virucidal Compounds in Foods
right, Damian H. Gilling
1.0 Introduction
1.1 Types of plant antimicrobials
2.0 Antiviral activity of compounds from plants
2.1 Efficacy of plant antimicrobials against enveloped viruses
2.2 Efficacy of plant antimicrobials against non-enveloped viruses
3.0 Mechanisms of antiviral action
3.1 Mechanisms of antiviral activity against enveloped viruses
3.2 Mechanisms of antiviral activity against non-enveloped viruses
4.0 Conclusions
5.0 References
17. Risk Assessment for Foodborne Viruses
Elizabeth Bradshaw and Lee-Ann Jaykus
1.0 Introduction to risk analysis
1.1 Risk management
1.2 Risk communication
1.3 Risk assessment
2.0 Microbial risk assessment
3.0 Process of risk assessment
4.0 Structure of risk assessment
4.1 Hazard identification
4.2 Exposure assessment
4.3 Hazard characterization
4.4 Risk characterization
5.0 Elements of risk assessment in food virology
5.1 Hazard assessment, risk profiles, and meta analysis
5.2 Data for exposure modeling
5.3 Predictive microbiology
5.4 Hazard characterization
6.0 Recent risk modeling efforts in food virology
6.1 Fresh produce
6.1.a Irrigation with wastewater or recycled water
6.1.b Fresh produce along the farm-to-fork chain
6.2 Molluscan shellfish
6.3 RTE foods and food handling
6.4 Synthesis comments
7.0 Conclusions
8.0 Acknowledgements
9.0 References
Index
Sagar M. Goyal is a Professor of Virology in the Veterinary Population Medicine Department at the University of Minnesota's College of Veterinary Medicine.
Jennifer L. Cannon is an Associate Professor of Food Virology at the University of Georgia’s Center for Food Safety and in the Department of Food Science and Technology.
Foodborne viruses are an important group of pathogens recognized to cause significant disease globally, in terms of both number of illnesses and severity of disease. Contamination of foods by enteric viruses, such as human norovirus and hepatitis A and E viruses, is a major concern to public health and food safety. Food Virology is a burgeoning field of emphasis for scientific research. Many developments in foodborne virus detection, prevention and control have been made in recent years and are the basis of this publication.
This second edition of Viruses in Foods provides an up-to-date description of foodborne viruses of public health importance, including their epidemiology and methods for detection, prevention and control. It uniquely includes case reports of past outbreaks with implications for better control of future outbreaks, a section that can be considered a handbook for foodborne virus detection, and updated and expanded information on virus prevention and control, with chapters on natural virucidal compounds in foods and risk assessment of foodborne viruses.