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Experimental validation of a predictive model for Salmonella growth In raw ground beef under dynamic temperatures
Descriptive
TitleInfo
Title
Experimental validation of a predictive model for Salmonella
growth In raw ground beef under dynamic temperatures
growth In raw ground beef under dynamic temperatures
Name
(type = personal)
NamePart
(type = family)
McConnell
NamePart
(type = given)
Jennifer A.
NamePart
(type = date)
1986-
DisplayForm
Jennifer McConnell
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)
Duffy
NamePart
(type = given)
Siobian
DisplayForm
Siobian Duffy
Affiliation
Advisory Committee
Role
RoleTerm
(authority = RULIB)
internal member
Name
(type = personal)
NamePart
(type = family)
Matthews
NamePart
(type = given)
Karl R.
DisplayForm
Karl R. Matthews
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)
When food is transported at ambient temperatures for extended periods of time, or when power is lost during natural disasters; foodborne pathogens can multiply. Current US Food and Drug Administration (FDA) Model Food Code guidelines state that food can be kept out of temperature control for up to 4 h or up to 6 h if the food product starts at an initial 41°F (5°C) and the temperature does not exceed 70°F (21°C). This project validates existing ComBase computer models for Salmonella spp. growth under changing temperature conditions in raw ground beef as model system, using scenarios that would exceed Food Code guidelines. This thesis is separated into a literature review describing FDA Model Food Code guidelines, Salmonella prevalence and concentration in ground beef, and dynamic models for bacterial growth (I) and experimental validation of ComBase computer models for Salmonella spp. growth in raw ground beef (II). The growth rate of a 5-strain cocktail of Salmonella spp. meat isolates was inoculated in 20% fat ground beef at a concentration of 4-log CFU/g. Inoculated ground beef samples were temperature abused for different lengths of time and to different maximum temperatures. The temperature profiles represent loss of proper refrigeration, warming and then cooling following a linear temperature gradient. A total of 9 different conditions were studied. Results show that when maximum temperatures were low, there was generally good agreement between the ComBase models and experiments. When maximum temperatures were closer to the optimum growth temperature for Salmonella (37°C), predictive models were fail-safe. It appears that faster cooling times limit the growth of Salmonella, so rapidly cooling foods (e.g. in a freezer) after extended temperature abuse can work as a risk mitigation measure. Validation of these models will be useful to extension professionals advising consumers, restaurateurs transporting food in unrefrigerated vehicles, and retailers facing a power outage. These finding may also be useful to those seeking to improve the science base of the FDA Model Food Code.
Subject
(authority = RUETD)
Topic
Microbial Biology
Subject
(authority = ETD-LCSH)
Topic
Beef--Quality
Subject
(authority = ETD-LCSH)
Topic
Salmonella
Subject
(authority = ETD-LCSH)
Topic
Temperature control
RelatedItem
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TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier
(type = RULIB)
ETD
Identifier
ETD_5070
PhysicalDescription
Form
(authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
vi, 40 p. : ill.
Note
(type = degree)
M.S.
Note
(type = bibliography)
Includes bibliographical references
Note
(type = statement of responsibility)
by Jennifer A. McConnell
RelatedItem
(type = host)
TitleInfo
Title
Graduate School - New Brunswick Electronic Theses and Dissertations
Identifier
(type = local)
rucore19991600001
Location
PhysicalLocation
(authority = marcorg);
(displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier
(type = doi)
doi:10.7282/T37942Q4
Genre
(authority = ExL-Esploro)
ETD graduate
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Rights
RightsDeclaration
(ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder
(type = personal)
Name
FamilyName
McConnell
GivenName
Jennifer
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime
(encoding = w3cdtf);
(qualifier = exact);
(point = start)
2013-09-27 15:37:15
AssociatedEntity
Name
Jennifer McConnell
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.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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Technical
RULTechMD
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ContentModel
ETD
OperatingSystem
(VERSION = 5.1)
windows xp
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