subject:(Food Microbiology)

1. Dankwa, Adwoa S. Safety Assessment of Hydroponic Closed System.

Degree: MS, Plant, Soil, and Environmental Sciences, 2019, University of Maine

URL: https://digitalcommons.library.umaine.edu/etd/2987

► The hydroponic system is an increasing sector for horticultural production. It is used mostly for fruit and vegetable production. Lettuce (Lactuca sativa) is one… (more)

▼ The hydroponic system is an increasing sector for horticultural production. It is used mostly for fruit and vegetable production. Lettuce (Lactuca sativa) is one of the most cultivated types of produce in the hydroponic system. It runs on nutrient solution and in some cases substrates. Water serves as the backbone for hydroponic production, mainly utilized for nutrient solution preparation. Substrates are sometimes added to provide support for plants root systems. Selection of substrate depends on the type of crop and the availability of the substrate. A good substrate should be able to balance the oxygen - water ratio around the root system and have a high water retention ability. Peat moss is an organic substrate mostly used by growers due to its sustainability and additional ability to retain nutrients on its surface. The hydroponic system is classified as open or closed system depending on the nutrient solution usage. The closed system reuses spent nutrient solution and is economical with less water wastage. There is, however, a high rate of pathogen build-up in this system. The assurance of food security, food safety, and high yield has made the hydroponic system a widely accepted mode of production many vegetable horticultural commercial growers. Due to less to no contact of growing media to edible portions, the system is believed to provide a relatively safe, healthy, and clean product. However, the isolation of pathogens such as Salmonella, Eshericheria coli O157:H7, Listeria monocytogenes, and Campylobacter spp. from hydroponically grown crops has created awareness about the potential risk of foodborne illnesses from this system. Research is geared toward screening of source of irrigation water and other potential sources of contamination in the hydroponic production. However, little is known about the possible source of contamination in the hydroponic system. The objectives of this study were to: (i) identify possible sources of contamination in the hydroponic system; (ii) evaluate the efficacy of behavior modification and/or sanitization in the reduction of microbial count on harvested produce throughout expected shelf life; and (iii) evaluate the microbial load on different peat moss substrates as well as heat-treated peat moss substrates. Water, leaf, root, and substrate samples were collected from an actively growing, closed hydroponic system. Water samples included ‘water outlet’, ‘water inlet’, tap water and ‘water reservoir’. The leaf samples consisted of onsite leaf and harvested leaf while the substrates were onsite substrate and fresh substrate. Substrate used in this study was of peat moss origin. Samples were enumerated for aerobic plate count (APC), coliform bacteria (CB), and yeast and mold (YM). Detection of Listeria was carried out and none was detected on any of the samples. Enumerated count for all microbes was highest in the onsite substrate samples. Interestingly, onsite lettuce leaves had the lowest count for… Advisors/Committee Members: Jennifer J. Perry, David Handley, Robson M. Machado.

Subjects/Keywords: Food Microbiology

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APA (6^th Edition):

Dankwa, A. S. (2019). Safety Assessment of Hydroponic Closed System. (Masters Thesis). University of Maine. Retrieved from https://digitalcommons.library.umaine.edu/etd/2987

Chicago Manual of Style (16^th Edition):

Dankwa, Adwoa S. “Safety Assessment of Hydroponic Closed System.” 2019. Masters Thesis, University of Maine. Accessed January 23, 2021. https://digitalcommons.library.umaine.edu/etd/2987.

MLA Handbook (7^th Edition):

Dankwa, Adwoa S. “Safety Assessment of Hydroponic Closed System.” 2019. Web. 23 Jan 2021.

Vancouver:

Dankwa AS. Safety Assessment of Hydroponic Closed System. [Internet] [Masters thesis]. University of Maine; 2019. [cited 2021 Jan 23]. Available from: https://digitalcommons.library.umaine.edu/etd/2987.

Council of Science Editors:

Dankwa AS. Safety Assessment of Hydroponic Closed System. [Masters Thesis]. University of Maine; 2019. Available from: https://digitalcommons.library.umaine.edu/etd/2987

University of Tennessee – Knoxville

2. Smith, Dara Melanie. Transcriptomic Analysis of Salmonella enterica Newport Adaptive Response to Oxidative Antimicrobials.

Degree: MS, Food Science and Technology, 2018, University of Tennessee – Knoxville

URL: https://trace.tennessee.edu/utk_gradthes/4981

► Agricultural water systems are a known potential source for contamination of fresh produce with foodborne pathogens including Listeria monocytogenes, pathogenic Escherichia coli, as well… (more)

▼ Agricultural water systems are a known potential source for contamination of fresh produce with foodborne pathogens including Listeria monocytogenes, pathogenic Escherichia coli, as well as Salmonella enterica strains. To reduce this associated risk, antimicrobials such as hypochlorite compounds and peroxyracetic acid (PAA) have been utilized as in-line irrigation disinfectants and as post-harvest treatments. These treatments are considered effective and commonly used; however, pathogenic microbes like Salmonella have the ability to adapt to many environmental conditions. Adaptive response to environmental factors like oxidative conditions, contributes to transfer, attachment, and resilience of Salmonella on surfaces. Through RNA sequencing and analysis of the obtained transcriptome, adaptive response of Salmonella to hypochlorite and PAA can be quantitatively evaluated. Within this study, an outbreak clinical isolate strain of Salmonella enterica Newport was utilized in simulating contaminated agricultural water exposed to hypochlorite and PAA treatment. Treatments consisted of two samples, each repeated in duplicate of 10 and 20 ppm hypochlorite and PAA each, with an aqueous control. Following exposure, cells were isolated for RNA extraction and sequencing to analyze mRNA for relative differential gene expression levels. The dynamic range of cellular adaptive response to chemical stressors was seen in the overall number of differentially expressed genes. They numbered from 11 genes to 316, 1,719, and 2,010 genes respectively for 10 ppm hypochlorite, 20 ppm hypochlorite, 10 ppm PAA, and 20 ppm PAA treatments, respectively. These transcripts ranged in cellular function from biosynthesis to degradation, energy generation, and non-metabolically linked functions. Notably, exposure to oxidative antimicrobials resulted in genes associated with key virulence, attachment, and gene transfer factors showing positive degrees of differential expression. These findings stress the importance of monitoring disinfectant application, and the potential for increasing the efficacy of treatments through further elucidation of microbial adaptive response. Advisors/Committee Members: Faith Critzer, David A. Golden, Qixin Zhong.

Subjects/Keywords: Food Microbiology

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APA (6^th Edition):

Smith, D. M. (2018). Transcriptomic Analysis of Salmonella enterica Newport Adaptive Response to Oxidative Antimicrobials. (Thesis). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_gradthes/4981

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Smith, Dara Melanie. “Transcriptomic Analysis of Salmonella enterica Newport Adaptive Response to Oxidative Antimicrobials.” 2018. Thesis, University of Tennessee – Knoxville. Accessed January 23, 2021. https://trace.tennessee.edu/utk_gradthes/4981.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Smith, Dara Melanie. “Transcriptomic Analysis of Salmonella enterica Newport Adaptive Response to Oxidative Antimicrobials.” 2018. Web. 23 Jan 2021.

Vancouver:

Smith DM. Transcriptomic Analysis of Salmonella enterica Newport Adaptive Response to Oxidative Antimicrobials. [Internet] [Thesis]. University of Tennessee – Knoxville; 2018. [cited 2021 Jan 23]. Available from: https://trace.tennessee.edu/utk_gradthes/4981.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Smith DM. Transcriptomic Analysis of Salmonella enterica Newport Adaptive Response to Oxidative Antimicrobials. [Thesis]. University of Tennessee – Knoxville; 2018. Available from: https://trace.tennessee.edu/utk_gradthes/4981

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Purdue University

3. Bach, Christopher E. Influence and characterization of microbial contaminants associated with the FDA BAM method used to detect Listeria monocytogenes from romaine lettuce.

Degree: MS, Botany and Plant Pathology, 2015, Purdue University

URL: http://docs.lib.purdue.edu/open_access_theses/560

► Over the past few decades in the US, fresh produce commodities have become increasingly prevalent vehicles for the attribution of foodborne illness. Recent outbreaks… (more)

▼ Over the past few decades in the US, fresh produce commodities have become increasingly prevalent vehicles for the attribution of foodborne illness. Recent outbreaks of the bacterial foodborne pathogen Listeria monocytogenes linked to fresh produce highlight this immediate issue facing food safety. The most widely used method to screen L. monocytogenes from food matrices in the US is the Bacteriological Analytical Manual (BAM) developed by the Food and Drug Administration (FDA). Detection of this pathogen from all foods is primarily accomplished by using four FDA approved Listeria selective media: Oxford (OXA), modified Oxford (MOX), Lithium chloride-phenylethanol-moxalactam fortified with esculin and iron (LPM), or PALCAM. Currently, there is a scarcity of evaluations concerning methods for isolation of L. monocytogenes from produce items. Thus, the first objective of this thesis work was to assess traditional FDA media and the commercial medium RAPID’L.mono for their use in detecting L. monocytogenes from the popular fresh produce item Romaine lettuce. Our results revealed that all four FDA media readily select for bacteria that based on their growth on the selective media appear to be L. monocytogenes but in fact belonged to other genera. The presence of these false positives ultimately limited the utility of each medium to detect Romaine lettuce samples that were found to be negative for L. monocytogenes. The commercial medium RAPID’L.mono was very accurate for detecting L. monocytogenes, as no false positives were characteristic of the pathogen on this medium. Testing false positives across media revealed that isolates recovered from MOX, OXA and PALCAM displayed broad positive behavior on other media. In contrast, the majority of isolates collected from LPM were found to have positive behavior restricted to that medium alone. The second objective of this thesis work was to perform whole genome sequencing of false positives taxonomically identified as Cellulomonas spp. to recover phylogenetic insights, determine how isolates survive selective plating and identify putative antibiotic target genes. Our phylogenetic analysis strongly supported that our isolates are species within the genusCellulomonas. Resistance or susceptibility to antibiotics utilized in FDA media may be conferred by gene repertoires unique to certain isolates. We identified one potential antibiotic target gene present in Cellulomonasisolates that can be considered for future development of a selective medium to eliminate these false positives. Advisors/Committee Members: Robert E Pruitt, Robert E Pruitt, M. Catherine Aime, Haley F. Oliver, Steve G. Hallett.

Subjects/Keywords: Food Microbiology; Food Science

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APA (6^th Edition):

Bach, C. E. (2015). Influence and characterization of microbial contaminants associated with the FDA BAM method used to detect Listeria monocytogenes from romaine lettuce. (Thesis). Purdue University. Retrieved from http://docs.lib.purdue.edu/open_access_theses/560

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Bach, Christopher E. “Influence and characterization of microbial contaminants associated with the FDA BAM method used to detect Listeria monocytogenes from romaine lettuce.” 2015. Thesis, Purdue University. Accessed January 23, 2021. http://docs.lib.purdue.edu/open_access_theses/560.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Bach, Christopher E. “Influence and characterization of microbial contaminants associated with the FDA BAM method used to detect Listeria monocytogenes from romaine lettuce.” 2015. Web. 23 Jan 2021.

Vancouver:

Bach CE. Influence and characterization of microbial contaminants associated with the FDA BAM method used to detect Listeria monocytogenes from romaine lettuce. [Internet] [Thesis]. Purdue University; 2015. [cited 2021 Jan 23]. Available from: http://docs.lib.purdue.edu/open_access_theses/560.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bach CE. Influence and characterization of microbial contaminants associated with the FDA BAM method used to detect Listeria monocytogenes from romaine lettuce. [Thesis]. Purdue University; 2015. Available from: http://docs.lib.purdue.edu/open_access_theses/560

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cal Poly

4. de Senna, Antoinette BoYee. Screening of biocontrol organisms for the management of phytopathogenic fungi and foodborne pathogens on produce.

Degree: MS, Food Science and Nutrition, 2015, Cal Poly

URL: https://digitalcommons.calpoly.edu/theses/1402 ; 10.15368/theses.2015.63

► The multibillion dollar agricultural industry is an important part of the United States economy, and the management of factors that affect crop and human… (more)

▼ The multibillion dollar agricultural industry is an important part of the United States economy, and the management of factors that affect crop and human health is imperative to maintaining this economic sector. The fungi Botrytis cinerea, Fusarium pallidoroseum, and Fusarium moniliforme are the causative agents of several plant diseases and can cause significant crop loss both before and after harvest in commodities such as strawberries, lettuce, citrus, and grains. Fungicides are employed to control these phytopathogens, but the use of these chemicals has led to an increase in fungicide resistance and may negatively affect the environment and human health. In addition to plant pathogens, foodborne pathogens also have a substantial impact on the agricultural industry. Foodborne disease outbreaks involving Listeria monocytogenes, Salmonella, and Escherichia coli O157:H7 not only cause considerable economic losses, but can also result in devastating health problems for consumers. The increase in fungicide resistance and number of produce-related foodborne disease outbreaks warrants investigation into additional methods of microbial control for use in the agricultural industry. Many bacterial species, including Lactic Acid Bacteria (LAB) and Bacillus species, produce antifungal and antimicrobial compounds, thus the use of biological control agents pre- and postharvest could augment current methods of pathogen management. The purpose of this study was to screen 22 bacterial isolates for inhibitory activity against the fungal phytopathogens Botrytis cinerea, Fusarium pallidoroseum, and Fusarium moniliforme and the foodborne pathogens Listeria monocytogenes, Salmonella, and Escherichia coli O157:H7 in vitro, then evaluate antimicrobial efficacy of select isolates against the foodborne pathogens on fresh produce. To evaluate antifungal activity, the bacterial isolates were individually spot-inoculated onto Tryptic Soy Agar, Potato Dextrose Agar, or MRS agar, depending on isolate growth requirements and then a plug of fungal-colonized agar was placed onto the center of the isolate-inoculated plate. Plates were incubated at 24°C for 10 days; fungal growth was evaluated daily, beginning on Day 3. Nine of the 22 isolates screened inhibited all three fungi; inhibition by these isolates ranged from 51-62% for B. cinerea, 60-68% for F. pallidoroseum, and 40-61% for F. moniliforme. Isolates were also screened for biosurfactant activity using the drop-collapse test. Biosurfactant production was detected in seven of the nine isolates. Bacillus megaterium, Bacillus coagulans, Bacillus thuringiensis BT2 and three Bacillus amyloliquefaciens isolates demonstrated strong biosurfactant activity and suppression of all three fungi, and therefore are recommended for further study. Antimicrobial activity of the isolates was assessed using… Advisors/Committee Members: Amanda Lathrop.

Subjects/Keywords: Food Microbiology; Food Science

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APA (6^th Edition):

de Senna, A. B. (2015). Screening of biocontrol organisms for the management of phytopathogenic fungi and foodborne pathogens on produce. (Masters Thesis). Cal Poly. Retrieved from https://digitalcommons.calpoly.edu/theses/1402 ; 10.15368/theses.2015.63

Chicago Manual of Style (16^th Edition):

de Senna, Antoinette BoYee. “Screening of biocontrol organisms for the management of phytopathogenic fungi and foodborne pathogens on produce.” 2015. Masters Thesis, Cal Poly. Accessed January 23, 2021. https://digitalcommons.calpoly.edu/theses/1402 ; 10.15368/theses.2015.63.

MLA Handbook (7^th Edition):

de Senna, Antoinette BoYee. “Screening of biocontrol organisms for the management of phytopathogenic fungi and foodborne pathogens on produce.” 2015. Web. 23 Jan 2021.

Vancouver:

de Senna AB. Screening of biocontrol organisms for the management of phytopathogenic fungi and foodborne pathogens on produce. [Internet] [Masters thesis]. Cal Poly; 2015. [cited 2021 Jan 23]. Available from: https://digitalcommons.calpoly.edu/theses/1402 ; 10.15368/theses.2015.63.

Council of Science Editors:

de Senna AB. Screening of biocontrol organisms for the management of phytopathogenic fungi and foodborne pathogens on produce. [Masters Thesis]. Cal Poly; 2015. Available from: https://digitalcommons.calpoly.edu/theses/1402 ; 10.15368/theses.2015.63

5. Peterson, Lisa A. The Effectiveness of Virtual Simulations Impacting Conceptual Knowledge and Proficiency of Laboratory Techniques in an Undergraduate Microbiology Laboratory Course.

Degree: MS, Health and Nutritional Sciences, 2014, South Dakota State University

URL: https://openprairie.sdstate.edu/etd/1573

► Middle school, high school, and undergraduate students are failing to pursue careers in science, technology, engineering, and mathematics (STEM) due to lack of interest,… (more)

Subjects/Keywords: Food Microbiology; Food Science

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APA (6^th Edition):

Peterson, L. A. (2014). The Effectiveness of Virtual Simulations Impacting Conceptual Knowledge and Proficiency of Laboratory Techniques in an Undergraduate Microbiology Laboratory Course. (Masters Thesis). South Dakota State University. Retrieved from https://openprairie.sdstate.edu/etd/1573

Chicago Manual of Style (16^th Edition):

Peterson, Lisa A. “The Effectiveness of Virtual Simulations Impacting Conceptual Knowledge and Proficiency of Laboratory Techniques in an Undergraduate Microbiology Laboratory Course.” 2014. Masters Thesis, South Dakota State University. Accessed January 23, 2021. https://openprairie.sdstate.edu/etd/1573.

MLA Handbook (7^th Edition):

Peterson, Lisa A. “The Effectiveness of Virtual Simulations Impacting Conceptual Knowledge and Proficiency of Laboratory Techniques in an Undergraduate Microbiology Laboratory Course.” 2014. Web. 23 Jan 2021.

Vancouver:

Peterson LA. The Effectiveness of Virtual Simulations Impacting Conceptual Knowledge and Proficiency of Laboratory Techniques in an Undergraduate Microbiology Laboratory Course. [Internet] [Masters thesis]. South Dakota State University; 2014. [cited 2021 Jan 23]. Available from: https://openprairie.sdstate.edu/etd/1573.

Council of Science Editors:

Peterson LA. The Effectiveness of Virtual Simulations Impacting Conceptual Knowledge and Proficiency of Laboratory Techniques in an Undergraduate Microbiology Laboratory Course. [Masters Thesis]. South Dakota State University; 2014. Available from: https://openprairie.sdstate.edu/etd/1573

Cornell University

6. Beno, Sarah Marie. BACILLALES INFLUENCE QUALITY AND SAFETY OF DAIRY PRODUCTS.

Degree: PhD, Food Science and Technology, 2017, Cornell University

URL: http://hdl.handle.net/1813/59049

► Bacillales, an order of Gram-positive bacteria, are commonly isolated from dairy foods and at various points along the dairy value chain. Three families of Bacillales… (more)

Subjects/Keywords: Microbiology; Food science

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APA (6^th Edition):

Beno, S. M. (2017). BACILLALES INFLUENCE QUALITY AND SAFETY OF DAIRY PRODUCTS. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/59049

Chicago Manual of Style (16^th Edition):

Beno, Sarah Marie. “BACILLALES INFLUENCE QUALITY AND SAFETY OF DAIRY PRODUCTS.” 2017. Doctoral Dissertation, Cornell University. Accessed January 23, 2021. http://hdl.handle.net/1813/59049.

MLA Handbook (7^th Edition):

Beno, Sarah Marie. “BACILLALES INFLUENCE QUALITY AND SAFETY OF DAIRY PRODUCTS.” 2017. Web. 23 Jan 2021.

Vancouver:

Beno SM. BACILLALES INFLUENCE QUALITY AND SAFETY OF DAIRY PRODUCTS. [Internet] [Doctoral dissertation]. Cornell University; 2017. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1813/59049.

Council of Science Editors:

Beno SM. BACILLALES INFLUENCE QUALITY AND SAFETY OF DAIRY PRODUCTS. [Doctoral Dissertation]. Cornell University; 2017. Available from: http://hdl.handle.net/1813/59049

7. Manjulata Devi, S. Molecular genetic studies of pediocin-like bacteriocin in pediococcus, lactobacillus and enterococcus sp; -.

Degree: Food Microbiology, 2014, University of Mysore

URL: http://shodhganga.inflibnet.ac.in/handle/10603/15868

►

The aim of the study was to isolate intergeneric or interspecific lactic acid newlinebacteria (LAB) producing the pediocin the pediocin PA-1 like bacteriocin from newlinedifferent… (more)

▼

The aim of the study was to isolate intergeneric or interspecific lactic acid newlinebacteria (LAB) producing the pediocin the pediocin PA-1 like bacteriocin from newlinedifferent sources. The isolates obtained from vegetable sources displayed strong antilisterial newlineactivity and considered for further characterization. The pediocin specific newlinegene PCR and dot-blot hybridization helped in the rapid detection of the pediocin PA- newline1 like bacteriocin. Further, the culture filtrate (CF) of the selected isolates was found newlineto have class IIa bacteriocin properties, which include, stability at wide temperatures newlineand pH, proteinaceous in nature and the anti-microbial peptide was found to be 4.6 newlineKDa. The physiological, biochemical and molecular typing techniques like RAPD and newlineRFLP, followed by 16S rDNA sequencing confirmed the taxonomical status of the newlineLAB producing the putative pediocin PA-1 like bacteriocin. The isolates were newlineidentified as Streptococcus equinus AC1 NCIM 5418, Pediococcus acidilactici NCIM newline5419, Ped. pentosaceus NCIM 5420, Lactobacillus plantarum Acr2 and, three isolates newlineof Enterococcus faecium NCIM 5421, NCIM 5422 and NCIM 5423, respectively. The newlinebacteriocin production at different temperatures, pH and salt concentrations was newlinestudied to investigate the optimal condition for application of these isolates as a starter newlineculture or as a biopreservative in either acidic or non-acidic foods newlineThe isolates Pediococcus acidilactici NCIM 5419 and NCIM 5424, Ped. newlinepentosaceus NCIM 5420, Enterococcus faecium NCIM 5423 and Lactobacillus newlineplantarum Acr2 were selected to determine the genetic determinants of the newlinebacteriocin encoded. The use of class IIa bacteriocin specific primers, plasmid curing, newlineimmunity assay and Southern hybridization with pedB as probe, revealed that all the newlineisolates produced plasmid encoded pediocin PA-1 like bacteriocin. It was observed by newlinePCR analysis that the selected isolates had a conserved operon arranged in pedABCD newlineorder.

Bibliography p 162-190, Appendix p 193-203

Advisors/Committee Members: Halami, Prakash M.

Subjects/Keywords: Food Microbiology; Biotechnology

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APA (6^th Edition):

Manjulata Devi, S. (2014). Molecular genetic studies of pediocin-like bacteriocin in pediococcus, lactobacillus and enterococcus sp; -. (Thesis). University of Mysore. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/15868

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Manjulata Devi, S. “Molecular genetic studies of pediocin-like bacteriocin in pediococcus, lactobacillus and enterococcus sp; -.” 2014. Thesis, University of Mysore. Accessed January 23, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/15868.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Manjulata Devi, S. “Molecular genetic studies of pediocin-like bacteriocin in pediococcus, lactobacillus and enterococcus sp; -.” 2014. Web. 23 Jan 2021.

Vancouver:

Manjulata Devi S. Molecular genetic studies of pediocin-like bacteriocin in pediococcus, lactobacillus and enterococcus sp; -. [Internet] [Thesis]. University of Mysore; 2014. [cited 2021 Jan 23]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/15868.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Manjulata Devi S. Molecular genetic studies of pediocin-like bacteriocin in pediococcus, lactobacillus and enterococcus sp; -. [Thesis]. University of Mysore; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/15868

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Zambia

8. Hamakoko, M. Characterisation and public health significance of selected enteropathogenic bacteria isloted from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia .

Degree: 2017, University of Zambia

URL: http://dspace.unza.zm:8080/xmlui/handle/123456789/5341

► Animals are known to harbour different pathogenic bacteria with potential for zoonosis especially with food producing animals like poultry. Currently quail farming is rapidly gaining… (more)

Subjects/Keywords: Food – Microbiology – Quails

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APA (6^th Edition):

Hamakoko, M. (2017). Characterisation and public health significance of selected enteropathogenic bacteria isloted from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia . (Thesis). University of Zambia. Retrieved from http://dspace.unza.zm:8080/xmlui/handle/123456789/5341

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hamakoko, M. “Characterisation and public health significance of selected enteropathogenic bacteria isloted from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia .” 2017. Thesis, University of Zambia. Accessed January 23, 2021. http://dspace.unza.zm:8080/xmlui/handle/123456789/5341.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hamakoko, M. “Characterisation and public health significance of selected enteropathogenic bacteria isloted from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia .” 2017. Web. 23 Jan 2021.

Vancouver:

Hamakoko M. Characterisation and public health significance of selected enteropathogenic bacteria isloted from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia . [Internet] [Thesis]. University of Zambia; 2017. [cited 2021 Jan 23]. Available from: http://dspace.unza.zm:8080/xmlui/handle/123456789/5341.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hamakoko M. Characterisation and public health significance of selected enteropathogenic bacteria isloted from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia . [Thesis]. University of Zambia; 2017. Available from: http://dspace.unza.zm:8080/xmlui/handle/123456789/5341

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

9. Hamakoko, Mukachikwikwi. Characterisation and public health significance of selected enteropathogenic bacteria isloated from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia.

Degree: 2017, University of Zimbabwe

URL: http://dspace.unza.zm/handle/123456789/5264

► Animals are known to harbour different pathogenic bacteria with potential for zoonosis especially with food producing animals like poultry. Currently quail farming is rapidly gaining… (more)

Subjects/Keywords: Food – Microbiology – Quails

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APA (6^th Edition):

Hamakoko, M. (2017). Characterisation and public health significance of selected enteropathogenic bacteria isloated from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia. (Thesis). University of Zimbabwe. Retrieved from http://dspace.unza.zm/handle/123456789/5264

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hamakoko, Mukachikwikwi. “Characterisation and public health significance of selected enteropathogenic bacteria isloated from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia.” 2017. Thesis, University of Zimbabwe. Accessed January 23, 2021. http://dspace.unza.zm/handle/123456789/5264.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hamakoko, Mukachikwikwi. “Characterisation and public health significance of selected enteropathogenic bacteria isloated from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia.” 2017. Web. 23 Jan 2021.

Vancouver:

Hamakoko M. Characterisation and public health significance of selected enteropathogenic bacteria isloated from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia. [Internet] [Thesis]. University of Zimbabwe; 2017. [cited 2021 Jan 23]. Available from: http://dspace.unza.zm/handle/123456789/5264.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hamakoko M. Characterisation and public health significance of selected enteropathogenic bacteria isloated from Japanese quails(Cortunix cortunix japonica) in Lusaka, Zambia. [Thesis]. University of Zimbabwe; 2017. Available from: http://dspace.unza.zm/handle/123456789/5264

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Maryland

10. Kroft, Brenda. CHARACTERIZATION, DISTRIBUTION, AND EVOLUTIONARY ACQUISITION OF ANTIMICROBIAL RESISTANCE ELEMENTS AMONG DIVERSE SALMONELLA SUBSPECIES.

Degree: Food Science, 2017, University of Maryland

URL: http://hdl.handle.net/1903/19824

► Insights into the evolution of antimicrobial resistance can be gleaned by examination of historical strains of Salmonella collected from a variety of locations, time periods,… (more)

▼ Insights into the evolution of antimicrobial resistance can be gleaned by examination of historical strains of Salmonella collected from a variety of locations, time periods, and sources. Here, the Salmonella Reference Collections were utilized to gain evidence into the distribution, prevalence, and reticulate nature of antimicrobial resistance from strains that represent the collective genetic diversity of Salmonella. Of the 141 strains examined, 25.5% were fully or intermediately resistant to one or more agents. Resistance to the older antimicrobials sulfisoxazole and streptomycin were more common than resistance to newer antimicrobials, with 15.6% and 14.2% of strains resistant, respectively. No strains presented with resistance to newer drugs – ciprofloxacin, cefoxitin, and ceftiofur specifically. Of particular importance was the identification of a correlation between strains isolated from food animal sources and the presence of resistance to streptomycin and kanamycin, as food animals have been implicated in the transfer of resistance elements through the food chain. Increased incidences of resistance were identified in serotypes Saintpaul, Heidelberg, and Typhimurium. Integrons, a major contributor to the horizontal transfer of resistance genes, were identified in 9.93% of strains and the most commonly harbored gene was aadA1, conferring resistance to streptomycin. Identification of exogenous genes responsible for the observed phenotypes revealed that 73.1% of resistant phenotypes could be accounted for by the presence of such an element. Analysis of horizontal gene transfer among the regulatory mar, ram and sox operon regions, which have been implicated in the development of multi-drug resistance via increased cellular efflux, revealed that recombination helped to maintain a handful of presumably beneficial alleles across subspecies I S. enterica. Diversification was particularly limited in the sox operon and in the global regulatory genes, as opposed to local regulators. Such lack of diversity speaks to the requirement for proper functioning of many processes in the cell. Retention of some clonality was seen in the closely-related SARA strains, with assortment of alleles more obvious across the more diverse SARB strains. Supported by evidence gathered here is the importance of horizontal gene transfer in evolution of selective benefits harbored by bacterial pathogens, in particular, S. enterica. Advisors/Committee Members: Meng, Jianghong (advisor).

Subjects/Keywords: Microbiology; Food science

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APA (6^th Edition):

Kroft, B. (2017). CHARACTERIZATION, DISTRIBUTION, AND EVOLUTIONARY ACQUISITION OF ANTIMICROBIAL RESISTANCE ELEMENTS AMONG DIVERSE SALMONELLA SUBSPECIES. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/19824

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kroft, Brenda. “CHARACTERIZATION, DISTRIBUTION, AND EVOLUTIONARY ACQUISITION OF ANTIMICROBIAL RESISTANCE ELEMENTS AMONG DIVERSE SALMONELLA SUBSPECIES.” 2017. Thesis, University of Maryland. Accessed January 23, 2021. http://hdl.handle.net/1903/19824.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kroft, Brenda. “CHARACTERIZATION, DISTRIBUTION, AND EVOLUTIONARY ACQUISITION OF ANTIMICROBIAL RESISTANCE ELEMENTS AMONG DIVERSE SALMONELLA SUBSPECIES.” 2017. Web. 23 Jan 2021.

Vancouver:

Kroft B. CHARACTERIZATION, DISTRIBUTION, AND EVOLUTIONARY ACQUISITION OF ANTIMICROBIAL RESISTANCE ELEMENTS AMONG DIVERSE SALMONELLA SUBSPECIES. [Internet] [Thesis]. University of Maryland; 2017. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1903/19824.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kroft B. CHARACTERIZATION, DISTRIBUTION, AND EVOLUTIONARY ACQUISITION OF ANTIMICROBIAL RESISTANCE ELEMENTS AMONG DIVERSE SALMONELLA SUBSPECIES. [Thesis]. University of Maryland; 2017. Available from: http://hdl.handle.net/1903/19824

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

11. Khadka, Pramod. Proteomics Study of Pre-Harvest Sprouting in Wheat.

Degree: MS, Biology and Microbiology, 2016, South Dakota State University

URL: https://openprairie.sdstate.edu/etd/968

► Pre-harvest sprouting (PHS) of wheat (Triticum aestivum L.) is a condition characterized by the early germination of spikes during moist environmental conditions. PHS lowers… (more)

Subjects/Keywords: Biology; Food Microbiology

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APA (6^th Edition):

Khadka, P. (2016). Proteomics Study of Pre-Harvest Sprouting in Wheat. (Masters Thesis). South Dakota State University. Retrieved from https://openprairie.sdstate.edu/etd/968

Chicago Manual of Style (16^th Edition):

Khadka, Pramod. “Proteomics Study of Pre-Harvest Sprouting in Wheat.” 2016. Masters Thesis, South Dakota State University. Accessed January 23, 2021. https://openprairie.sdstate.edu/etd/968.

MLA Handbook (7^th Edition):

Khadka, Pramod. “Proteomics Study of Pre-Harvest Sprouting in Wheat.” 2016. Web. 23 Jan 2021.

Vancouver:

Khadka P. Proteomics Study of Pre-Harvest Sprouting in Wheat. [Internet] [Masters thesis]. South Dakota State University; 2016. [cited 2021 Jan 23]. Available from: https://openprairie.sdstate.edu/etd/968.

Council of Science Editors:

Khadka P. Proteomics Study of Pre-Harvest Sprouting in Wheat. [Masters Thesis]. South Dakota State University; 2016. Available from: https://openprairie.sdstate.edu/etd/968

The Ohio State University

12. Wang, Zihua. Persistence of ESBL E. coli in Poultry Production Free of Antibiotic Application.

Degree: MS, Food Science and Technology, 2018, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1524047763189613

► The rapid rise of antibiotic resistant pathogens has been a major public health threat.However, commensal bacteria have played key roles in antibiotic resistance (AR)development, dissemination… (more)

Subjects/Keywords: Food Science; Microbiology

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APA (6^th Edition):

Wang, Z. (2018). Persistence of ESBL E. coli in Poultry Production Free of Antibiotic Application. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1524047763189613

Chicago Manual of Style (16^th Edition):

Wang, Zihua. “Persistence of ESBL E. coli in Poultry Production Free of Antibiotic Application.” 2018. Masters Thesis, The Ohio State University. Accessed January 23, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524047763189613.

MLA Handbook (7^th Edition):

Wang, Zihua. “Persistence of ESBL E. coli in Poultry Production Free of Antibiotic Application.” 2018. Web. 23 Jan 2021.

Vancouver:

Wang Z. Persistence of ESBL E. coli in Poultry Production Free of Antibiotic Application. [Internet] [Masters thesis]. The Ohio State University; 2018. [cited 2021 Jan 23]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1524047763189613.

Council of Science Editors:

Wang Z. Persistence of ESBL E. coli in Poultry Production Free of Antibiotic Application. [Masters Thesis]. The Ohio State University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1524047763189613

The Ohio State University

13. Morrison, Nathan J. Inactivation and injury of Salmonella enterica serovar Enteritidis in buffer and whole liquid egg during treatment with mild heat, ozone and their combinations.

Degree: MS, Food Science and Technology, 2015, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1434646616

► The food industry is in need of better processing combinations to reduce the risk of pathogens in food. Combining mild antimicrobial treatments will produce a… (more)

▼ The food industry is in need of better processing combinations to reduce the risk of pathogens in food. Combining mild antimicrobial treatments will produce a higher quality food product from both a sensory and microbial safety standpoint. Ozone and mild heat have shown promise as synergistic treatments when used in combination in some food products. The current model is a guess-and-check system, and a predictive model for which treatment combinations work is not available. During an antimicrobial treatment, bacterial cells that are sublethally injured may rejuvenate afterwards. By assessing cell injury produced by different ozone and mild heat treatments, it may be possible to maximize the effect of combination processes. The application of this research can be used in liquid egg products, where proteins may be damaged by heat pasteurization that is currently mandated by the USDA. The objectives of this research were: (i) to determine the rate and magnitude of sublethal injury exhibited by Salmonella Enteritidis after treatment with mild heat and ozone; and (ii) to develop a method of treating liquid whole egg products with a combination of mild heat and ozone for potential pasteurization treatment.Salmonella Enteritidis was treated with mild heat and aqueous ozone in a single-pass filtration system. Total and healthy cell populations were enumerated by plating on nonselective and selective media, respectively, after each treatment. In low inoculum (107 CFU/filter) experiments, heat treatment of Salmonella Enteritidis resulted in a D55°C-value of 2.5 minutes for the whole population and a D55°C-value of 1.5 minutes for healthy cells only, causing a significant amount of sublethal injury. Ozone treatment (1 ppm) resulted in a 1.9 log reduction after 5 seconds but sublethal injury was not detected until 60 seconds of treatment. Combining the treatments sequentially improved the microbial kill, but did not result in synergistic inactivation against Salmonella Enteritidis. Application of heat-ozone combination to high-inoculum (108 CFU/filter) cell suspensions had antagonistic effects compared to ozone treatment alone. Cell clumping upon heat treatment prevented the two treatments from being synergistic in the filtration treatment method that was used. Liquid whole eggs were treated with mild heat and aqueous ozone. Heat treating eggs at 55.5 °C for 15 minutes reduced Salmonella Enteritidis by 1.9 log CFU/mL while ozone (8 ppm) did not cause a reduction in the Salmonella Enteritidis population. A combination process in which liquid whole eggs were treated with aqueous ozone after heat treatment resulted in a synergistic inactivation, reducing the Salmonella Enteritidis population by 3.8 log CFU/mL. Based on this outcome, a combined process of mild heat and ozone treatment can be made sufficiently lethal to meet pasteurization requirements in liquid whole eggs. Further optimization of the process in the future will ensure a higher quality liquid egg product and minimize the addition of water to the product during ozone… Advisors/Committee Members: Yousef, Ahmed (Advisor).

Subjects/Keywords: Food Science; Microbiology

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APA (6^th Edition):

Morrison, N. J. (2015). Inactivation and injury of Salmonella enterica serovar Enteritidis in buffer and whole liquid egg during treatment with mild heat, ozone and their combinations. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1434646616

Chicago Manual of Style (16^th Edition):

Morrison, Nathan J. “Inactivation and injury of Salmonella enterica serovar Enteritidis in buffer and whole liquid egg during treatment with mild heat, ozone and their combinations.” 2015. Masters Thesis, The Ohio State University. Accessed January 23, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1434646616.

MLA Handbook (7^th Edition):

Morrison, Nathan J. “Inactivation and injury of Salmonella enterica serovar Enteritidis in buffer and whole liquid egg during treatment with mild heat, ozone and their combinations.” 2015. Web. 23 Jan 2021.

Vancouver:

Morrison NJ. Inactivation and injury of Salmonella enterica serovar Enteritidis in buffer and whole liquid egg during treatment with mild heat, ozone and their combinations. [Internet] [Masters thesis]. The Ohio State University; 2015. [cited 2021 Jan 23]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1434646616.

Council of Science Editors:

Morrison NJ. Inactivation and injury of Salmonella enterica serovar Enteritidis in buffer and whole liquid egg during treatment with mild heat, ozone and their combinations. [Masters Thesis]. The Ohio State University; 2015. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1434646616

Penn State University

14. Williams, Kezi Malcolm. FATE OF LISTERIA MONOCYTOGENES ON INTACT AND WOUNDED APPLES DURING STORAGE AND IN A SIMULATED DUMP TANK.

Degree: 2018, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/15357kvw5404

► The effect of fruit carnauba wax and shellac fruit coatings on the fate of Listeria monocytogenes inoculated onto whole fresh apples during storage was studied.… (more)

▼ The effect of fruit carnauba wax and shellac fruit coatings on the fate of Listeria monocytogenes inoculated onto whole fresh apples during storage was studied. Little information exists on the effectiveness of commercial fruit coatings for reducing L. monocytogenes populations on fruit. There is also little information on the effect of poststorage parameters, such as temperature, relative humidity, apple variety, and wound damage on fate of L. monocytogenes on stored apples nor the degree to which cross contamination is limited when apples are submerged in sanitizer solutions, such as occurs in apple dump tanks and flumes. To address these issues, studies were done to determine: 1) if commercially-available carnauba wax or shellac coatings affect L. monocytogenes growth; 2) the fate of L. monocytogenes populations on intact and wounded fresh apples during refrigerated or ambient temperature; and 3) the level of L. monocytogenes destruction and cross-contamination that occurs in a simulated dump tank. In the first study, a plate overlay assay method was used to determine if carnauba wax or shellac formulations had any effect on growth and survival of L. monocytogenes. Solid pellets were prepared by thoroughly drying the coatings in plastic molds to eliminate any potential antimicrobial effects of the carrier solvents present in the formulations. Results from this study showed no zones of inhibition or signs of growth enhancement after 24 and 48 hours incubation, thus indicating that neither coating had negative or positive effects on L. monocytogenes growth. iv To follow up on these preliminary results, the fate of L. monocytogenes during refrigerated (4 °C) storage of coated or un-coated apples for up to 28 days was determined. In addition to coating effects, variables tested were incorporation of 0.1% lauric arginate into the coating formulations, direct application of 0.1% aqueous lauric arginate onto apples prior to storage, and skin wounding,. Wounds were created to simulate damage to apples that could occur during transportation or movement along the packing line. Significant (p<0.05) decreases in L. monocytogenes were observed for all treatments and the control during the 28-day storage period at 4 °C and 50% RH. There were no significant differences between the two coating types and the control, nor were there differences between the two coating types, thus confirming the results of the plate assay. Incorporation of 0.1% lauric arginate in either coating formulation only slightly increased the rate of L. monocytogenes destruction on intact inoculation sites, but not on the wounded sites. Overall, the aqueous lauric arginate resulted in a greater reduction rates compared to the same antimicrobial emulsified into the fruit coatings. In another experiment of this study, the effects of storage temperature (4 or 20o C), storage relative humidity (50 or 89 % RH), and apple variety (Fuji or McIntosh) on intact or wounded inoculation sties were studied. No significant differences in L. monocytogenes populations were… Advisors/Committee Members: Dr. Luke LaBorde, Thesis Advisor/Co-Advisor, Dr. Catherine Cutter, Committee Member, Dr. Edward Dudley, Committee Member.

Subjects/Keywords: Food Science; Food Microbiology; Food Safety

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APA (6^th Edition):

Williams, K. M. (2018). FATE OF LISTERIA MONOCYTOGENES ON INTACT AND WOUNDED APPLES DURING STORAGE AND IN A SIMULATED DUMP TANK. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/15357kvw5404

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Williams, Kezi Malcolm. “FATE OF LISTERIA MONOCYTOGENES ON INTACT AND WOUNDED APPLES DURING STORAGE AND IN A SIMULATED DUMP TANK.” 2018. Thesis, Penn State University. Accessed January 23, 2021. https://submit-etda.libraries.psu.edu/catalog/15357kvw5404.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Williams, Kezi Malcolm. “FATE OF LISTERIA MONOCYTOGENES ON INTACT AND WOUNDED APPLES DURING STORAGE AND IN A SIMULATED DUMP TANK.” 2018. Web. 23 Jan 2021.

Vancouver:

Williams KM. FATE OF LISTERIA MONOCYTOGENES ON INTACT AND WOUNDED APPLES DURING STORAGE AND IN A SIMULATED DUMP TANK. [Internet] [Thesis]. Penn State University; 2018. [cited 2021 Jan 23]. Available from: https://submit-etda.libraries.psu.edu/catalog/15357kvw5404.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Williams KM. FATE OF LISTERIA MONOCYTOGENES ON INTACT AND WOUNDED APPLES DURING STORAGE AND IN A SIMULATED DUMP TANK. [Thesis]. Penn State University; 2018. Available from: https://submit-etda.libraries.psu.edu/catalog/15357kvw5404

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Arkansas

15. Dawley, Cailin. Aqueous Ozone Inactivation of Viruses and Bacteria on Biotic and Abiotic Surfaces.

Degree: MS, 2018, University of Arkansas

URL: https://scholarworks.uark.edu/etd/3022

► Produce is susceptible to contamination by foodborne pathogens. Food service establishments utilize sanitizing agents to reduce microbes on produce surfaces. The research objectives were… (more)

▼ Produce is susceptible to contamination by foodborne pathogens. Food service establishments utilize sanitizing agents to reduce microbes on produce surfaces. The research objectives were to evaluate the efficacy of aqueous ozone 1) on the inactivation of viruses and bacteria on produce; 2) on the inactivation of viruses on stainless steel; and 3) against viruses in association with bacteria on produce surfaces. For objective 1, Boston bibb lettuce and cherry tomatoes were spot inoculated with a cocktail of viruses (murine norovirus (MNV) and MS2 bacteriophage) or bacteria (Enterobacter cloacae and Bacillus cereus) and washed for 40 min with samples taken every 10 min. For objective 2, stainless steel (SS) coupons were spot inoculated with the same cocktail of viruses and washed for 0.5, 3, and 10 min. For objective 3, Boston bibb was spot inoculated with either MNV and E. cloacae or MNV and B. cereus and washed for 40 min with samples taken every 10 min. Inocula were allowed to dry for > 90 min. A batch wash ozone sanitation system (BWOSS) was prepared with ice (3-5°C) and 0.5 ppm ozone or no ozone. Surfaces were treated with either an ozone or water wash with samples taken over time and repeated in at least duplicate. Samples were processed to determine plaque forming units (PFU) and colony forming units (CFU). In objective 1, there were no significant differences in inactivation of MNV, MS2, or bacteria with ozone compared to water only. There was greater variability in viral reduction while bacterial inactivation increased over time. In objective 2, there was no significant difference in inactivation of MNV or MS2 on SS, but the variability was reduced. The log reduction difference between ozone and water for MNV and MS2 after 10 min was 0.25 and 0.51 PFU/ml, respectively. In objective 3, MNV-bacteria association on lettuce did not impact ozone inactivation of MNV. The log reduction differences between ozone and water for MNV with B. cereus and MNV with E. cloacae after 40 min were 0.95 and -0.36 PFU/ml, respectively. Further research is needed on how food matrices effects viral inactivation by ozone. Advisors/Committee Members: Kristen Gibson, Ruben Morawicki, Young Min Kwon.

Subjects/Keywords: Food Safety; Ozone; Produce; Food Microbiology; Food Studies; Pathogenic Microbiology

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APA (6^th Edition):

Dawley, C. (2018). Aqueous Ozone Inactivation of Viruses and Bacteria on Biotic and Abiotic Surfaces. (Masters Thesis). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/3022

Chicago Manual of Style (16^th Edition):

Dawley, Cailin. “Aqueous Ozone Inactivation of Viruses and Bacteria on Biotic and Abiotic Surfaces.” 2018. Masters Thesis, University of Arkansas. Accessed January 23, 2021. https://scholarworks.uark.edu/etd/3022.

MLA Handbook (7^th Edition):

Dawley, Cailin. “Aqueous Ozone Inactivation of Viruses and Bacteria on Biotic and Abiotic Surfaces.” 2018. Web. 23 Jan 2021.

Vancouver:

Dawley C. Aqueous Ozone Inactivation of Viruses and Bacteria on Biotic and Abiotic Surfaces. [Internet] [Masters thesis]. University of Arkansas; 2018. [cited 2021 Jan 23]. Available from: https://scholarworks.uark.edu/etd/3022.

Council of Science Editors:

Dawley C. Aqueous Ozone Inactivation of Viruses and Bacteria on Biotic and Abiotic Surfaces. [Masters Thesis]. University of Arkansas; 2018. Available from: https://scholarworks.uark.edu/etd/3022

Purdue University

16. Assisi, Clara. Genomic and transcriptomic analysis of biofilm formation in persistent and transient L. monocytogenes.

Degree: MS, Food Science, 2016, Purdue University

URL: https://docs.lib.purdue.edu/open_access_theses/831

► The Next Generation Sequencing (NGS) has been popularized and aid in the advancement of many fields of science. The other field of science that… (more)

Subjects/Keywords: Biological sciences; Food Science; Microbiology

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APA (6^th Edition):

Assisi, C. (2016). Genomic and transcriptomic analysis of biofilm formation in persistent and transient L. monocytogenes. (Thesis). Purdue University. Retrieved from https://docs.lib.purdue.edu/open_access_theses/831

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Assisi, Clara. “Genomic and transcriptomic analysis of biofilm formation in persistent and transient L. monocytogenes.” 2016. Thesis, Purdue University. Accessed January 23, 2021. https://docs.lib.purdue.edu/open_access_theses/831.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Assisi, Clara. “Genomic and transcriptomic analysis of biofilm formation in persistent and transient L. monocytogenes.” 2016. Web. 23 Jan 2021.

Vancouver:

Assisi C. Genomic and transcriptomic analysis of biofilm formation in persistent and transient L. monocytogenes. [Internet] [Thesis]. Purdue University; 2016. [cited 2021 Jan 23]. Available from: https://docs.lib.purdue.edu/open_access_theses/831.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Assisi C. Genomic and transcriptomic analysis of biofilm formation in persistent and transient L. monocytogenes. [Thesis]. Purdue University; 2016. Available from: https://docs.lib.purdue.edu/open_access_theses/831

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University

17. Estabrooks, Ray Gilbert. Development of rapid staining, microplating and counting techniques for bacteria in food products.

Degree: MS, Bacteriology, 1952, Oregon State University

URL: http://hdl.handle.net/1957/50922

Subjects/Keywords: Food – Microbiology

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APA (6^th Edition):

Estabrooks, R. G. (1952). Development of rapid staining, microplating and counting techniques for bacteria in food products. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/50922

Chicago Manual of Style (16^th Edition):

Estabrooks, Ray Gilbert. “Development of rapid staining, microplating and counting techniques for bacteria in food products.” 1952. Masters Thesis, Oregon State University. Accessed January 23, 2021. http://hdl.handle.net/1957/50922.

MLA Handbook (7^th Edition):

Estabrooks, Ray Gilbert. “Development of rapid staining, microplating and counting techniques for bacteria in food products.” 1952. Web. 23 Jan 2021.

Vancouver:

Estabrooks RG. Development of rapid staining, microplating and counting techniques for bacteria in food products. [Internet] [Masters thesis]. Oregon State University; 1952. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1957/50922.

Council of Science Editors:

Estabrooks RG. Development of rapid staining, microplating and counting techniques for bacteria in food products. [Masters Thesis]. Oregon State University; 1952. Available from: http://hdl.handle.net/1957/50922

Oregon State University

18. Timm, Elizabeth M. Isolation and survival of Campylobacter jejuni in foods.

Degree: MS, Food Science and Technology, 1981, Oregon State University

URL: http://hdl.handle.net/1957/27465

► The objective of this project was to evaluate various culturing and isolation techniques of Campylobacter jejuni and to develop methods to detect the organism in… (more)

Subjects/Keywords: Food – Microbiology

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APA (6^th Edition):

Timm, E. M. (1981). Isolation and survival of Campylobacter jejuni in foods. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/27465

Chicago Manual of Style (16^th Edition):

Timm, Elizabeth M. “Isolation and survival of Campylobacter jejuni in foods.” 1981. Masters Thesis, Oregon State University. Accessed January 23, 2021. http://hdl.handle.net/1957/27465.

MLA Handbook (7^th Edition):

Timm, Elizabeth M. “Isolation and survival of Campylobacter jejuni in foods.” 1981. Web. 23 Jan 2021.

Vancouver:

Timm EM. Isolation and survival of Campylobacter jejuni in foods. [Internet] [Masters thesis]. Oregon State University; 1981. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1957/27465.

Council of Science Editors:

Timm EM. Isolation and survival of Campylobacter jejuni in foods. [Masters Thesis]. Oregon State University; 1981. Available from: http://hdl.handle.net/1957/27465

Oregon State University

19. Matches, Jack Ronald. The effects of lupulon on the thermal reduction rate of bacterial spores (P.A. 3679).

Degree: MS, Food Technology, 1958, Oregon State University

URL: http://hdl.handle.net/1957/26336

Subjects/Keywords: Food – Microbiology

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APA (6^th Edition):

Matches, J. R. (1958). The effects of lupulon on the thermal reduction rate of bacterial spores (P.A. 3679). (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/26336

Chicago Manual of Style (16^th Edition):

Matches, Jack Ronald. “The effects of lupulon on the thermal reduction rate of bacterial spores (P.A. 3679).” 1958. Masters Thesis, Oregon State University. Accessed January 23, 2021. http://hdl.handle.net/1957/26336.

MLA Handbook (7^th Edition):

Matches, Jack Ronald. “The effects of lupulon on the thermal reduction rate of bacterial spores (P.A. 3679).” 1958. Web. 23 Jan 2021.

Vancouver:

Matches JR. The effects of lupulon on the thermal reduction rate of bacterial spores (P.A. 3679). [Internet] [Masters thesis]. Oregon State University; 1958. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1957/26336.

Council of Science Editors:

Matches JR. The effects of lupulon on the thermal reduction rate of bacterial spores (P.A. 3679). [Masters Thesis]. Oregon State University; 1958. Available from: http://hdl.handle.net/1957/26336

Oregon State University

20. Li, Ken-yuon. The microbial stability of refrigerated intermediate moisture foods.

Degree: PhD, Food Science and Technology, 1988, Oregon State University

URL: http://hdl.handle.net/1957/27221

► The lag phase, the specific growth rate, the minimum a [subscript w] required for growth and the temperature characteristic of Fsendomonas fluorescens, Brochothrix thermosphacta, Salmonella… (more)

▼ The lag phase, the specific growth rate, the minimum a [subscript w] required for growth and the temperature characteristic of Fsendomonas fluorescens, Brochothrix thermosphacta, Salmonella typhlmurium, Streptococcus faecalis and, Staphylococcus aureus have been studied in liquid model media under controlled temperature and a [subscript w] conditions. The results show that the lag phase increases and the specific growth rates decreases when the temperature is lowered or the a [subscript w] is reduced. The minimum a [subscript w] required for growth increases when the incubation temperature is lowered. At refrigeration temperature the minimum a [subscript w] for growth of mesophiles is higher than that of psychrotrophs. The temperature characteristic (representing the activation energy for growth) of psychrotrophs is lower than that of mesophiles, and therefore mesophiles are more sensitive to temperature changes. All of these growth parameters depend on the a [subscript w] controlling solute. The solute effect can be traced to the ability of the solute to penetrate into the cell and can be explained by the osmoregulatory mechanism. In general, it was found that the effect of the solute on these parameters had the order glycerol<NaCl<sucrose. A comparison of three models for the effect of temperature on growth rate (linear, square-root, and Arrhenius) showed that the linear model had both the advantage of simplicity and accuracy. In general, the Arrhenius model showed the poorest fit to experimental data. A predictive method was developed to assess the microbial stability of liquid model systems exposed to fluctuating temperatures. The strategy was to predict lag time and growth rate by different regression equations, and to estimate microbial growth using an integral function of the accumulated time. A lag time predictive model was developed using a linear relationship between lag time and reciprocal growth rate. A linear equation was used to predict growth rate as a function of temperature. The model was used to predict the growth of B. thermosphacta in liquid model media with low a [subscript w] and exposed to fluctuating temperatures. The predictions were acceptable at a 95% confidence level. This method will be used in future studies to predict the microbial stability of refrigerated foods exposed to temperature abuse. Advisors/Committee Members: Torres, J. Antonio (advisor), Fryer, John L. (committee member).

Subjects/Keywords: Food – Microbiology

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APA (6^th Edition):

Li, K. (1988). The microbial stability of refrigerated intermediate moisture foods. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/27221

Chicago Manual of Style (16^th Edition):

Li, Ken-yuon. “The microbial stability of refrigerated intermediate moisture foods.” 1988. Doctoral Dissertation, Oregon State University. Accessed January 23, 2021. http://hdl.handle.net/1957/27221.

MLA Handbook (7^th Edition):

Li, Ken-yuon. “The microbial stability of refrigerated intermediate moisture foods.” 1988. Web. 23 Jan 2021.

Vancouver:

Li K. The microbial stability of refrigerated intermediate moisture foods. [Internet] [Doctoral dissertation]. Oregon State University; 1988. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1957/27221.

Council of Science Editors:

Li K. The microbial stability of refrigerated intermediate moisture foods. [Doctoral Dissertation]. Oregon State University; 1988. Available from: http://hdl.handle.net/1957/27221

West Virginia University

21. Tesfai, Adiam Tsegai. Effect of Electron Beam Radiation on Microbial Inactivation, Radio-resistance and Nutritional Quality of Food.

Degree: PhD, Animal and Nutritional Sciences, 2013, West Virginia University

URL: https://doi.org/10.33915/etd.5006 ; https://researchrepository.wvu.edu/etd/5006

► A non-thermal food processing method, Electron beam radiation efficiently inactivates foodborne pathogens. However, foodborne pathogens may develop resistance in response to sublethal stresses. Thus it… (more)

▼ A non-thermal food processing method, Electron beam radiation efficiently inactivates foodborne pathogens. However, foodborne pathogens may develop resistance in response to sublethal stresses. Thus it is important to study the response of food microorganisms to e-beam and understand the mechanism underlying their survival abilities. The overall objective of this study was to examine the inactivation of foodborne microorganisms by electron beam radiation at sublethal levels, understand the radio-resistance development to this processing method and also to determine the effects of e-beam on chemical changes of nutrients in infant formula.;Four independent studies are included in this dissertation, in the first study, development of radio-resistant Salmonella Typhimurium in egg as a microbial response to e-beam at sublethal levels was investigated and the D10-value for S. Typhimurium was determined after repetitive processing with e-beam at sub-lethal doses. Survivors were enumerated on non-selective (TSA) and selective (XLD) media. Survivors from the highest dose were isolated and used in subsequent e-beam cycle. This process was repeated four times for a total of five e-beam cycles. D10-values for S. Typhimurium ATCC strain 14028 were 0.59+/-0.031 and 0.46+/-0.022 kGy on TSA and XLD, respectively. However, following the fifth e-beam cycle, the respective D10-values increased (P0.05) to develop radio-resistance faster on selective media, likely due to facilitated selection of radio-resistant cells within microbial population following each e-beam cycle. For all five e-beam cycles, S. Typhimurium had higher (P<0.05) D10-values on non-selective media, indicating that sub-lethal injury followed by cellular repair and recovery are important for radio-resistance and inactivation of this microorganism.;To further investigate the radio resistance development of microorganisms to repetitive e-beam sublethal doses, in the second study DNA repair deficient E.coli DH5alpha that have mutations of recA and gyrA genes was used. The objective was to determine if repetitive processing with e-beam at sub-lethal doses increases D10-value of E. coli DH5alpha in ground beef. Five cycles of e-beam were conducted. D10-values increased (P<0.05) significantly with each cycle. Following the third cycle D10-values were 0.32+/-0.006 and 0.32+/-0.002 kGy for survivors enumerated on non-selective and selective media, respectively; the fourth cycle 0.39+/-0.007 and 0.40+/-0.019 kGy; and the fifth cycle 0.46+/-0.006 and 0.46+/-0.020 kGy. The result of the study indicates E. coli DH5alpha increases radio-resistance to e-beam as a result of repetitive exposure to sub-lethal doses despite its DNA repair deficiency.;The third study investigated the role of recA and gyrA genes in E.coli DH5alpha that had become resistant to repetitive e-beam radiation in the previous study and its ability to repair the damage caused by e-beam. Genomic DNA from E.coli DH5alpha, radio-resistant A2 and A4 were extracted, and DNA fragments of the gyrA and recA genes… Advisors/Committee Members: Jacek Jaczynski, Gary K Bissonnette, Kristen E Matak.

Subjects/Keywords: Food science; Microbiology; Molecular biology

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APA (6^th Edition):

Tesfai, A. T. (2013). Effect of Electron Beam Radiation on Microbial Inactivation, Radio-resistance and Nutritional Quality of Food. (Doctoral Dissertation). West Virginia University. Retrieved from https://doi.org/10.33915/etd.5006 ; https://researchrepository.wvu.edu/etd/5006

Chicago Manual of Style (16^th Edition):

Tesfai, Adiam Tsegai. “Effect of Electron Beam Radiation on Microbial Inactivation, Radio-resistance and Nutritional Quality of Food.” 2013. Doctoral Dissertation, West Virginia University. Accessed January 23, 2021. https://doi.org/10.33915/etd.5006 ; https://researchrepository.wvu.edu/etd/5006.

MLA Handbook (7^th Edition):

Tesfai, Adiam Tsegai. “Effect of Electron Beam Radiation on Microbial Inactivation, Radio-resistance and Nutritional Quality of Food.” 2013. Web. 23 Jan 2021.

Vancouver:

Tesfai AT. Effect of Electron Beam Radiation on Microbial Inactivation, Radio-resistance and Nutritional Quality of Food. [Internet] [Doctoral dissertation]. West Virginia University; 2013. [cited 2021 Jan 23]. Available from: https://doi.org/10.33915/etd.5006 ; https://researchrepository.wvu.edu/etd/5006.

Council of Science Editors:

Tesfai AT. Effect of Electron Beam Radiation on Microbial Inactivation, Radio-resistance and Nutritional Quality of Food. [Doctoral Dissertation]. West Virginia University; 2013. Available from: https://doi.org/10.33915/etd.5006 ; https://researchrepository.wvu.edu/etd/5006

Oregon State University

22. Girón, Alejo. High pressure induced pH change and its effect on the inactivation of Lactobacillus plantarum and Escherichia coli.

Degree: MS, Food Science and Technology, 2005, Oregon State University

URL: http://hdl.handle.net/1957/22854

Subjects/Keywords: Food – Microbiology

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APA (6^th Edition):

Girón, A. (2005). High pressure induced pH change and its effect on the inactivation of Lactobacillus plantarum and Escherichia coli. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/22854

Chicago Manual of Style (16^th Edition):

Girón, Alejo. “High pressure induced pH change and its effect on the inactivation of Lactobacillus plantarum and Escherichia coli.” 2005. Masters Thesis, Oregon State University. Accessed January 23, 2021. http://hdl.handle.net/1957/22854.

MLA Handbook (7^th Edition):

Girón, Alejo. “High pressure induced pH change and its effect on the inactivation of Lactobacillus plantarum and Escherichia coli.” 2005. Web. 23 Jan 2021.

Vancouver:

Girón A. High pressure induced pH change and its effect on the inactivation of Lactobacillus plantarum and Escherichia coli. [Internet] [Masters thesis]. Oregon State University; 2005. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1957/22854.

Council of Science Editors:

Girón A. High pressure induced pH change and its effect on the inactivation of Lactobacillus plantarum and Escherichia coli. [Masters Thesis]. Oregon State University; 2005. Available from: http://hdl.handle.net/1957/22854

23. Woolford, James. Comparative phenotypic and transcriptional differences of Campylobacter jejuni when challenged with low molecular weight chitosan.

Degree: PhD, 2015, University of Northampton

URL: https://pure.northampton.ac.uk/en/studentTheses/8f197d97-fb90-442a-bc71-2dfd47a69eb2 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.722402

► Campylobacter jejuni is a prominent food-borne pathogen and causative agent of Campylobacteriosis infection. This infection arises primarily from the consumption of foodstuffs/beverages previously contaminated with… (more)

▼ Campylobacter jejuni is a prominent food-borne pathogen and causative agent of Campylobacteriosis infection. This infection arises primarily from the consumption of foodstuffs/beverages previously contaminated with this microorganism. Despite current food control measures currently employed, this pathogen remains problematic despite its fastidious nature. To help control the spread of Campylobacter many hurdles are used in the food industry, including natural products such as modified atmosphere and salt. Other natural antimicrobials are shown to possess antibacterial activity. Chitosan, a natural antimicrobial, has promising uses in food production. However, little is known about the transcriptional differences of C. jejuni upon chitosan exposure. Molecular responses may allow for generation of adaptive responses in an attempt to combat such a stressor, possibly altering phenotypic and virulence potential. The aims of this study were to establish the adaptive response of C. jejuni to low molecular weight chitosan by assessing the phenotypic and molecular differences arising from the chitosan challenge. By exposing C. jejuni NTCT11168 to suboptimal levels of chitosan, based on MIC determination on a model system, an adaptive strain of C. jejuni has been developed. This newly developed isolate, referred to as the ‘adapted’ C. jejuni NCTC11168 was found to have enhanced antimicrobial tolerance to chitosan, with a 3.83 fold increase in MIC relative to the parental wild-type C. jejuni NCTC11168 cells (0.012% - 0.046% (w/v) respectively). Antimicrobial activity of chitosan was found to be pH dependant. Differences in motility were also apparent between the ‘adapted’ and wild-type strains. Consistent increases in motility were noted in the ‘adapted’ cells, especially in relation to wild-type after 24, 48 and 72 hours (p < 0.05). Biofilm formation was also enhanced especially in the ‘adapted’ isolate relative to the wild-type NCTC11168 cells. This was indicated by significant increases, most notably after 3 days formation (p < 0.05). Microarray analysis revealed significant alterations in transcriptional levels in response to chitosan exposure. Protein-encoding genes, believed to be associated with energy metabolism, solute/ion uptake/acquisition and efflux systems, were found to be differentially regulated when grown in the presence of low molecular weight chitosan (p < 0.05). Overlapping between initial comparisons revealed several genes, which were differentially regulated. Most notably, PEB3 (major antigenic peptide), Cj0017c (disulphide bond formation) and Cj0294 (thiamine biosynthesis) genes were found to be up regulated in ‘adapted’ C. jejuni cells when compared to the wild-type (p < 0.05). Whilst significant down regulation was found in the protein-coding genes, Cj0025c (putative sodium:dicarboxylate symporter) and Cj1608 (two-component regulator). These results indicate that regulation of these genes may contribute to enhanced phenotypic responses observed in the ‘adapted’ isolate of C. jejuni NCTC11168. These…

Subjects/Keywords: 616; QR115 Food microbiology

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APA (6^th Edition):

Woolford, J. (2015). Comparative phenotypic and transcriptional differences of Campylobacter jejuni when challenged with low molecular weight chitosan. (Doctoral Dissertation). University of Northampton. Retrieved from https://pure.northampton.ac.uk/en/studentTheses/8f197d97-fb90-442a-bc71-2dfd47a69eb2 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.722402

Chicago Manual of Style (16^th Edition):

Woolford, James. “Comparative phenotypic and transcriptional differences of Campylobacter jejuni when challenged with low molecular weight chitosan.” 2015. Doctoral Dissertation, University of Northampton. Accessed January 23, 2021. https://pure.northampton.ac.uk/en/studentTheses/8f197d97-fb90-442a-bc71-2dfd47a69eb2 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.722402.

MLA Handbook (7^th Edition):

Woolford, James. “Comparative phenotypic and transcriptional differences of Campylobacter jejuni when challenged with low molecular weight chitosan.” 2015. Web. 23 Jan 2021.

Vancouver:

Woolford J. Comparative phenotypic and transcriptional differences of Campylobacter jejuni when challenged with low molecular weight chitosan. [Internet] [Doctoral dissertation]. University of Northampton; 2015. [cited 2021 Jan 23]. Available from: https://pure.northampton.ac.uk/en/studentTheses/8f197d97-fb90-442a-bc71-2dfd47a69eb2 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.722402.

Council of Science Editors:

Woolford J. Comparative phenotypic and transcriptional differences of Campylobacter jejuni when challenged with low molecular weight chitosan. [Doctoral Dissertation]. University of Northampton; 2015. Available from: https://pure.northampton.ac.uk/en/studentTheses/8f197d97-fb90-442a-bc71-2dfd47a69eb2 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.722402

University College Cork

24. Morrissey, Ruth M. Shining light on food microbiology; applications of luciferase-tagged microorganisms in the food industry.

Degree: 2013, University College Cork

URL: http://hdl.handle.net/10468/1395

► Bioluminescence is the production of light by living organisms as a result of a number of enzyme catalysed reactions caused by enzymes termed luciferases. The… (more)

Subjects/Keywords: Luciferase; Luciferases; Bioluminescence; Food – Microbiology

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APA (6^th Edition):

Morrissey, R. M. (2013). Shining light on food microbiology; applications of luciferase-tagged microorganisms in the food industry. (Thesis). University College Cork. Retrieved from http://hdl.handle.net/10468/1395

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Morrissey, Ruth M. “Shining light on food microbiology; applications of luciferase-tagged microorganisms in the food industry.” 2013. Thesis, University College Cork. Accessed January 23, 2021. http://hdl.handle.net/10468/1395.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Morrissey, Ruth M. “Shining light on food microbiology; applications of luciferase-tagged microorganisms in the food industry.” 2013. Web. 23 Jan 2021.

Vancouver:

Morrissey RM. Shining light on food microbiology; applications of luciferase-tagged microorganisms in the food industry. [Internet] [Thesis]. University College Cork; 2013. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/10468/1395.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Morrissey RM. Shining light on food microbiology; applications of luciferase-tagged microorganisms in the food industry. [Thesis]. University College Cork; 2013. Available from: http://hdl.handle.net/10468/1395

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University

25. Paddock, Fleta. The thermal-death-point of micro-organisms found in "spoiled" canned fruit.

Degree: 1901, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:49219

Thesis – State Agricultural College, 1901

Subjects/Keywords: Food – Microbiology

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APA (6^th Edition):

Paddock, F. (1901). The thermal-death-point of micro-organisms found in "spoiled" canned fruit. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:49219

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Paddock, Fleta. “The thermal-death-point of micro-organisms found in "spoiled" canned fruit.” 1901. Thesis, Michigan State University. Accessed January 23, 2021. http://etd.lib.msu.edu/islandora/object/etd:49219.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Paddock, Fleta. “The thermal-death-point of micro-organisms found in "spoiled" canned fruit.” 1901. Web. 23 Jan 2021.

Vancouver:

Paddock F. The thermal-death-point of micro-organisms found in "spoiled" canned fruit. [Internet] [Thesis]. Michigan State University; 1901. [cited 2021 Jan 23]. Available from: http://etd.lib.msu.edu/islandora/object/etd:49219.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Paddock F. The thermal-death-point of micro-organisms found in "spoiled" canned fruit. [Thesis]. Michigan State University; 1901. Available from: http://etd.lib.msu.edu/islandora/object/etd:49219

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University

26. Normington, Ruth. Studies in the heat resistant organisms of cold packed canned peas.

Degree: 1919, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:49021

Thesis – Michigan Agricultural College, 1919

Subjects/Keywords: Food – Microbiology

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APA (6^th Edition):

Normington, R. (1919). Studies in the heat resistant organisms of cold packed canned peas. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:49021

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Normington, Ruth. “Studies in the heat resistant organisms of cold packed canned peas.” 1919. Thesis, Michigan State University. Accessed January 23, 2021. http://etd.lib.msu.edu/islandora/object/etd:49021.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Normington, Ruth. “Studies in the heat resistant organisms of cold packed canned peas.” 1919. Web. 23 Jan 2021.

Vancouver:

Normington R. Studies in the heat resistant organisms of cold packed canned peas. [Internet] [Thesis]. Michigan State University; 1919. [cited 2021 Jan 23]. Available from: http://etd.lib.msu.edu/islandora/object/etd:49021.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Normington R. Studies in the heat resistant organisms of cold packed canned peas. [Thesis]. Michigan State University; 1919. Available from: http://etd.lib.msu.edu/islandora/object/etd:49021

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Maryland

27. Han, Sanghyun. SALMONELLA ENTERICA INTERACTIONS WITH TOMATO: PLANT GENOTYPE EFFECTS AND SALMONELLA GENETIC RESPONSES.

Degree: Plant Science and Landscape Architecture (PLSA), 2015, University of Maryland

URL: http://hdl.handle.net/1903/17017

► Several outbreaks of Salmonella enterica infections have been linked to tomatoes. One cost-effective way to complement on-farm preventive Good Agricultural Practices would be to identify… (more)

▼ Several outbreaks of Salmonella enterica infections have been linked to tomatoes. One cost-effective way to complement on-farm preventive Good Agricultural Practices would be to identify cultivars with inherent decreased susceptibility to Salmonella colonization. Various tomato cultivars with distinct phenotypes were screened to evaluate their susceptibility to Salmonella epiphytic colonization. The potential role of plant exudates, collected from the same cultivars, on the growth kinetics of Salmonella was examined. These investigations were supplemented with Salmonella genome-wide transcriptomics that showed bacterial responses to colonization of tomato shoots and roots. Epiphytic colonization of fruit by S. enterica was cultivar-dependent and serotype-specific, but did not correlate with leaf colonization. Fruit and leaves of the same cultivar differed in their ability to support Salmonella growth. Quantitative and qualitative analysis of tomato exudates provided a possible explanation for the differential susceptibility to bacterial colonization among tomato cultivars. Tomato exudates alone were capable of supporting Salmonella growth, and the growth kinetics of Salmonella in tomato exudates differed by cultivar. Characterization of the chemical composition of primary and secondary metabolites in tomato exudates pointed to potential causes for the differential growth of Salmonella observed in the exudates of various tomato cultivars. Key transcriptomic signals that were down- and up-regulated in Salmonella upon interacting with tomato were identified, enabling us to elucidate the molecular mechanisms underlying this enteric pathogen-plant interaction. Overall, the identified signals lead to a proposed model that depicts the cellular processes needed to preserve cell viability when multiple abiotic stresses in conjunction with low nutrient availability are encountered, while simultaneously repressing unnecessary energy demands or maintaining them at a level equivalent to growth in a nutritious medium. These findings strongly support the hypothesis that plant-regulated mechanisms influence enteric pathogen colonization. It is clear that Salmonella can sense subtle environmental cues brought about by the genotype or physiological state of plants and can respond with distinct patterns of gene expression. Future work should focus on whether this bacterial behavior on plants results from an evolutionary adaptation to use plants as a vector to re-enter animal hosts. Advisors/Committee Members: Micallef, Shirley A. (advisor).

Subjects/Keywords: Microbiology; Plant sciences; Food science

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APA (6^th Edition):

Han, S. (2015). SALMONELLA ENTERICA INTERACTIONS WITH TOMATO: PLANT GENOTYPE EFFECTS AND SALMONELLA GENETIC RESPONSES. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/17017

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Han, Sanghyun. “SALMONELLA ENTERICA INTERACTIONS WITH TOMATO: PLANT GENOTYPE EFFECTS AND SALMONELLA GENETIC RESPONSES.” 2015. Thesis, University of Maryland. Accessed January 23, 2021. http://hdl.handle.net/1903/17017.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Han, Sanghyun. “SALMONELLA ENTERICA INTERACTIONS WITH TOMATO: PLANT GENOTYPE EFFECTS AND SALMONELLA GENETIC RESPONSES.” 2015. Web. 23 Jan 2021.

Vancouver:

Han S. SALMONELLA ENTERICA INTERACTIONS WITH TOMATO: PLANT GENOTYPE EFFECTS AND SALMONELLA GENETIC RESPONSES. [Internet] [Thesis]. University of Maryland; 2015. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1903/17017.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Han S. SALMONELLA ENTERICA INTERACTIONS WITH TOMATO: PLANT GENOTYPE EFFECTS AND SALMONELLA GENETIC RESPONSES. [Thesis]. University of Maryland; 2015. Available from: http://hdl.handle.net/1903/17017

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Maryland

28. Wang, Miao. ASSESSMENT OF PREHARVEST MICROBIAL QUALITY OF CANTALOUPES AND PUBLIC HEALTH RISKS ASSOCIATED WITH CANTALOUPES CONTAMINATED WITH LISTERIA MONOCYTOGENES.

Degree: Food Science, 2014, University of Maryland

URL: http://hdl.handle.net/1903/15917

► Cantaloupe has been recognized as a common vehicle for foodborne infections among fresh produce commodities. A severe multistate outbreak of Listeria monocytogenes associated with the… (more)

▼ Cantaloupe has been recognized as a common vehicle for foodborne infections among fresh produce commodities. A severe multistate outbreak of Listeria monocytogenes associated with the consumption of whole cantaloupe resulted in 33 deaths in 2011. Quantitative microbial risk assessment (QMRA) modeling in food safety risk analysis has been acknowledged as an efficient tool to estimate and provide knowledge needed to manage potential public health risks associated with foodborne pathogens. The objectives of this study were to (i) conduct a microbiological survey of pre-harvest cantaloupes from farms in mid-Atlantic region, and (ii) develop a "farm to table" QMRA model for L. monocytogenes in cantaloupe. The results of the regional microbiological survey indicated a 5.3% (2/38) prevalence of generic Escherichia coli and negative for L. monocytogenes and Salmonella on cantaloupe during harvest season. A QMRA model was developed based on a thorough review of data from scientific publications and communications with fresh-cut processing industry. The model was simulated with Monte Carlo technique for 100,000 iterations in @Risk. The model estimated the public health risks associated with the consumption of both fresh-cut and whole cantaloupes in the U.S. The model demonstrated the risk associated with the consumption of a serving of fresh-cut cantaloupe is around 10 times higher than that for whole cantaloupe. Using the baseline model, the estimated median number of listeriosis cases per year associated with the consumption of fresh-cut cantaloupe among susceptible subpopulation and general healthy population are 0.0368 and 0.00134, respectively. Sensitivity analysis suggested temperature control during retail (correlation coefficient: 0.69) and home storage (correlation coefficient: 0.48) are two critical factors in mitigating the risk for fresh-cut cantaloupe consumption while home storage temperature (correlation coefficient: 0.79) after cutting is the most important factor for whole cantaloupe consumption. The QMRA model provided critical information for risk management and identified the critical data gaps including initial contamination and prevalence for future risk assessments of melon. Advisors/Committee Members: Pradhan, Abani K (advisor).

Subjects/Keywords: Food science; Public health; Microbiology

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APA (6^th Edition):

Wang, M. (2014). ASSESSMENT OF PREHARVEST MICROBIAL QUALITY OF CANTALOUPES AND PUBLIC HEALTH RISKS ASSOCIATED WITH CANTALOUPES CONTAMINATED WITH LISTERIA MONOCYTOGENES. (Thesis). University of Maryland. Retrieved from http://hdl.handle.net/1903/15917

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wang, Miao. “ASSESSMENT OF PREHARVEST MICROBIAL QUALITY OF CANTALOUPES AND PUBLIC HEALTH RISKS ASSOCIATED WITH CANTALOUPES CONTAMINATED WITH LISTERIA MONOCYTOGENES.” 2014. Thesis, University of Maryland. Accessed January 23, 2021. http://hdl.handle.net/1903/15917.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wang, Miao. “ASSESSMENT OF PREHARVEST MICROBIAL QUALITY OF CANTALOUPES AND PUBLIC HEALTH RISKS ASSOCIATED WITH CANTALOUPES CONTAMINATED WITH LISTERIA MONOCYTOGENES.” 2014. Web. 23 Jan 2021.

Vancouver:

Wang M. ASSESSMENT OF PREHARVEST MICROBIAL QUALITY OF CANTALOUPES AND PUBLIC HEALTH RISKS ASSOCIATED WITH CANTALOUPES CONTAMINATED WITH LISTERIA MONOCYTOGENES. [Internet] [Thesis]. University of Maryland; 2014. [cited 2021 Jan 23]. Available from: http://hdl.handle.net/1903/15917.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wang M. ASSESSMENT OF PREHARVEST MICROBIAL QUALITY OF CANTALOUPES AND PUBLIC HEALTH RISKS ASSOCIATED WITH CANTALOUPES CONTAMINATED WITH LISTERIA MONOCYTOGENES. [Thesis]. University of Maryland; 2014. Available from: http://hdl.handle.net/1903/15917

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

29. Yeung, Timothy W. Encapsulation of Probiotic Microorganisms in Food-Grade Hydrogel Microbeads for Improving Long-Term Storage and Oral Delivery.

Degree: University of Massachusetts

URL: https://scholarworks.umass.edu/masters_theses_2/459

► Probiotics die over time during processing, storage and digestion, resulting in reduced health benefits to the consumer. Microencapsulation of microorganisms is an effective way… (more)

Subjects/Keywords: Food Microbiology

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Yeung, T. W. (n.d.). Encapsulation of Probiotic Microorganisms in Food-Grade Hydrogel Microbeads for Improving Long-Term Storage and Oral Delivery. (Thesis). University of Massachusetts. Retrieved from https://scholarworks.umass.edu/masters_theses_2/459

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yeung, Timothy W. “Encapsulation of Probiotic Microorganisms in Food-Grade Hydrogel Microbeads for Improving Long-Term Storage and Oral Delivery.” Thesis, University of Massachusetts. Accessed January 23, 2021. https://scholarworks.umass.edu/masters_theses_2/459.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yeung, Timothy W. “Encapsulation of Probiotic Microorganisms in Food-Grade Hydrogel Microbeads for Improving Long-Term Storage and Oral Delivery.” Web. 23 Jan 2021.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Yeung TW. Encapsulation of Probiotic Microorganisms in Food-Grade Hydrogel Microbeads for Improving Long-Term Storage and Oral Delivery. [Internet] [Thesis]. University of Massachusetts; [cited 2021 Jan 23]. Available from: https://scholarworks.umass.edu/masters_theses_2/459.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

Yeung TW. Encapsulation of Probiotic Microorganisms in Food-Grade Hydrogel Microbeads for Improving Long-Term Storage and Oral Delivery. [Thesis]. University of Massachusetts; Available from: https://scholarworks.umass.edu/masters_theses_2/459

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Michigan State University

30. Johnson, Edwin A. Bacteriological, zymological & cytological studies of the cause of soft cucumber pickles.

Degree: MS, 1937, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:9403

Subjects/Keywords: Food – Microbiology

Record Details Similar Records Cite « Share

❌

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Johnson, E. A. (1937). Bacteriological, zymological & cytological studies of the cause of soft cucumber pickles. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:9403

Chicago Manual of Style (16^th Edition):

Johnson, Edwin A. “Bacteriological, zymological & cytological studies of the cause of soft cucumber pickles.” 1937. Masters Thesis, Michigan State University. Accessed January 23, 2021. http://etd.lib.msu.edu/islandora/object/etd:9403.

MLA Handbook (7^th Edition):

Johnson, Edwin A. “Bacteriological, zymological & cytological studies of the cause of soft cucumber pickles.” 1937. Web. 23 Jan 2021.

Vancouver:

Johnson EA. Bacteriological, zymological & cytological studies of the cause of soft cucumber pickles. [Internet] [Masters thesis]. Michigan State University; 1937. [cited 2021 Jan 23]. Available from: http://etd.lib.msu.edu/islandora/object/etd:9403.

Council of Science Editors:

Johnson EA. Bacteriological, zymological & cytological studies of the cause of soft cucumber pickles. [Masters Thesis]. Michigan State University; 1937. Available from: http://etd.lib.msu.edu/islandora/object/etd:9403

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Open Access Theses and Dissertations