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Understanding and managing risk of norovirus contamination on frozen berries from farm to fork
Descriptive
TitleInfo
Title
Understanding and managing risk of norovirus contamination on frozen berries from farm to fork
Name
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Miranda
NamePart
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Robyn C.
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1992-
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Robyn C. Miranda
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author
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Schaffner
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Donald
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Donald Schaffner
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Advisory Committee
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chair
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Rutgers University
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degree grantor
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School of Graduate Studies
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school
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theses
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2019
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2019-10
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English
Abstract
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Norovirus 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.
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.
Subject
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Topic
Food Science
Subject
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Topic
Norovirus
Subject
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Topic
Fruit -- Contamination -- Risk assessment
Subject
(authority = LCSH)
Topic
Frozen berries
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Rutgers University Electronic Theses and Dissertations
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ETD_10168
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1 online resource (xi, 209 pages) : illustrations
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Ph.D.
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Includes bibliographical references
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School of Graduate Studies Electronic Theses and Dissertations
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rucore10001600001
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doi:10.7282/t3-hd84-7k88
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ETD doctoral
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Rights
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The author owns the copyright to this work.
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Name
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Miranda
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Robyn
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Permission or license
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2019-08-14 15:29:38
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Robyn Miranda
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Rutgers University. School of Graduate Studies
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Author Agreement License
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I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
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Copyright protected
Availability
Status
Open
Reason
Permission or license
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2019-08-14T19:23:59
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