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Understanding and managing risk of norovirus contamination on frozen berries from farm to fork
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Miranda, Robyn C.. Understanding and managing risk of norovirus contamination on frozen berries from farm to fork. Retrieved from https://doi.org/doi:10.7282/t3-hd84-7k88

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TitleUnderstanding and managing risk of norovirus contamination on frozen berries from farm to fork
NameMiranda, Robyn C. (author); Schaffner, Donald (chair); Rutgers University; School of Graduate Studies
Date Created2019
Other Date2019-10 (degree)
SubjectFood Science, Norovirus, Fruit -- Contamination -- Risk assessment, Frozen berries
Extent1 online resource (xi, 209 pages) : illustrations
DescriptionNorovirus is the leading cause of acute gastroenteritis worldwide. Consumption of frozen berries have been identified as a risk factor for norovirus illness. This dissertation studies four scenarios that affect the risk of norovirus on frozen berries: the effect of freezing and frozen storage on the survival of bacteriophage MS2 (a norovirus surrogate) on frozen strawberries and raspberries; thermal inactivation kinetics of MS2 on frozen strawberry and raspberry purées in a water bath; efficacy of microwave heating on the destruction of MS2 in frozen strawberries; and an agent-based model simulating fruit pickers on a farm to quantify the spread of norovirus from an ill worker to coworkers and berries. The results show that bacteriophage MS2 is able to survive frozen storage on frozen berry products over long periods of time; heating of frozen berries following the product’s label instructions using the Defrost microwave oven setting resulted in minimal inactivation of MS2; and increased handwashing compliance on farm had a significant effect on the contamination of berries prior to reaching the consumer and an overall decrease in ill consumers.
A quantitative microbial risk assessment was also developed to assess the risk of norovirus associated with consumption of frozen strawberries. A 2012 norovirus outbreak in Germany linked to frozen strawberries was simulated using the model. Model predictions were in good agreement with data from the actual outbreak. The risk assessment model developed may provide useful quantitative data relevant for risk management initiatives, aimed at controlling the risk of norovirus from frozen berry products.
The research presented in this proposal was funded in part by the USDA-NIFA Food Virology Collaborative, NoroCORE (Norovirus Collaborative for Outreach, Research and Education) – a food safety initiative with the goal to reduce the burden of foodborne disease associated with noroviruses.
NotePh.D.
NoteIncludes bibliographical references
Genretheses, ETD doctoral
Persistent URLhttps://doi.org/doi:10.7282/t3-hd84-7k88
LanguageEnglish
CollectionSchool of Graduate Studies Electronic Theses and Dissertations
Organization NameRutgers, The State University of New Jersey
RightsThe author owns the copyright to this work.
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