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Modeling of norovirus transmission during slicing and quantitative risk assessment of human norovirus transmission in a foodservice system

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TitleInfo
Title
Modeling of norovirus transmission during slicing and quantitative risk assessment of human norovirus transmission in a foodservice system
Name (type = personal)
NamePart (type = family)
Li
NamePart (type = given)
Di
NamePart (type = date)
1981-
DisplayForm
Di Li
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Schaffner
NamePart (type = given)
Donald W
DisplayForm
Donald W Schaffner
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Fefferman
NamePart (type = given)
Nina H
DisplayForm
Nina H Fefferman
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Morin
NamePart (type = given)
Peter J
DisplayForm
Peter J Morin
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Powell
NamePart (type = given)
Mark
DisplayForm
Mark Powell
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
outside member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
Graduate School - New Brunswick
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2013
DateOther (qualifier = exact); (type = degree)
2013-10
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Human norovirus is the leading cause of outbreaks of acute non-bacterial gastroenteritis worldwide. Recent epidemiological evidence indicated that preparation of fresh produce for use as ingredients in ready-to-eat food in commercial settings has been a significant source of the norovirus infections in the United States. In this dissertation, to help understand the cross-contamination of norovirus during preparation and service of fresh produce product in foodservice systems, we analyzed spread pattern of norovirus from a single tomato to many others via the use of a commercial slicer. Murine norovirus (MNV) was used as a surrogate. A non-linear regression equation was generated: y = -0.903* ln(x) + 7.945, (R² = 0.91), where y = log MNV per slicing and x = tomato number. The MNV levels transferred generally decreased as the number of tomatoes sliced increased, with some exceptions. Infrequent but erratic transfers, where the MNV level of a subsequent tomato was higher than that of a preceding tomato, occurred in later transfer of some trials. This study illustrates the complex nature of risk prediction associated with norovirus cross-contamination during food preparation in commercial establishments. We also developed a simulation model to quantify the overall effect of norovirus cross-contamination in a food service establishment. For each possible source of initial contamination, using a manual tap versus a hands-free faucet were studied at 0, 30, 50, 70, and 100% handwashing compliance levels to check the number of salads and employees that may end up carrying more than 10 norovirus. When a lettuce/tomato was the initial source of contamination, change of knife and cutting board/slicer every 100 lettuce/tomato units was simulated. Change of tongs after preparation of every 100 salads was also simulated when a manual tap was used. Our model provides valuable information that can be considered for the control of NoV outbreaks. The results from our study suggested that multiple factors should be considered to control the spread of NoV, and that no one or even multiple combinations of factors will completely control NoV transmission risk.
Subject (authority = RUETD)
Topic
Ecology and Evolution
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_5094
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
xii, 124 p. : ill.
Note (type = degree)
Ph.D.
Note (type = bibliography)
Includes bibliographical references
Note (type = vita)
Includes vita
Note (type = statement of responsibility)
by Di Li
Subject (authority = ETD-LCSH)
Topic
Foodborne diseases--United States--Prevention
Subject (authority = ETD-LCSH)
Topic
Viral gastroenteritis--United States--Prevention
RelatedItem (type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier (type = local)
rucore19991600001
Location
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NjNbRU
Identifier (type = doi)
doi:10.7282/T3NP22GR
Genre (authority = ExL-Esploro)
ETD doctoral
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Li
GivenName
Di
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2013-09-30 13:45:17
AssociatedEntity
Name
Di Li
Role
Copyright holder
Affiliation
Rutgers University. Graduate School - New Brunswick
AssociatedObject
Type
License
Name
Author Agreement License
Detail
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.
RightsEvent
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2013-10-31
DateTime (encoding = w3cdtf); (qualifier = exact); (point = end)
2015-10-31
Type
Embargo
Detail
Access to this PDF has been restricted at the author's request. It will be publicly available after October 31st, 2015.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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ETD
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windows xp
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