Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 145 for “"O157"”.
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Genomische Unterschiede zwischen Shiga Toxin-Produzierenden Escherichia coli (STEC) O157:H7 und Sorbitol Fermentierenden (SF) STEC O157:H- -Stämmen
… Escherichia coli (STEC)-Stämme des Serotyps O157:H- stellen bedeutsame Auslöser für Durchfallerkrankungen und des lebensbedrohlichen Hämolytisch-Urämischen Syndroms (HUS) in Mitteleuropa dar. Die Virulenzfaktoren und Krankheitsbilder solcher Stämme ähneln denen von STEC O157:H7-Stämmen, …
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Inactivation of Escherichia coli O157:H7 on raw vegetable sprouts
… with calcinated calcium spray on E. coli O157:H7 population reduction on radish sprouts was investigated. The results showed that spraying radish seeds soaked in 200 ppm chlorine solution with 0.04% calcinated calcium solution had potential in inhibiting growth of E. coli O157:H7. The …
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Acid adaptation of Escherichia coli O157:H7 in fermented goat milk
… phase of the study, acid resistance of E. coli O157:H7 strain UT 10 and E. coli ATCC 25922 was determined in brain heart infusion broth at pH 7.4, 4.5 and 2.5. Variations due to acid stress in the counts of both strains were determined. Alterations in the fatty acid profile due to acid …
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Factors regulating the production of STX-2 in Escherichia coli O157:H7
<p>The severity of Escherichia coli O157:H7 disease is due in part to a major virulence factor produced by the microbe, the shiga-like toxin 2 (Stx-2). Antibiotic treatment to reduce pathogen numbers is controversial, as it is thought that antibiotics may increase the levels of Stx-2 released from …
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Mechanisms Associated with Attachment of Escherichia coli O157:H7 to Lettuce Surfaces
… as a model, the attachment of Escherichia coli O157:H7 to produce surfaces was studied. Strains expressing various extracellular proteins (curli, O157-antigen, and intimin) known to influence attachment of E. coli to intestinal cells were evaluated for their physicochemical properties and …
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Detection and survival of Escherichia coli O157:H7 in cattle water troughs and the effects of cetylpyridinium chloride against Escherichia coli O157:H7 biofilms on the surface of stainless steel
Escherichia coli O157:H7 is an emerging food pathogen that was first identified as a cause of illness in 1982. According to CDC (The Center for Disease Control and Prevention) estimates, E. coli O157:H7 is responsible for about 73,000 illnesses, 2,000 hospitalizations and 60 deaths in the United …
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MOL-PCR For SNP Based Detection and Characterization of STEC non-O157 Strains
… to human illness. In the United States, STEC O157:H7 strains have been attributed to the majority of disease and outbreaks; however, the frequency of disease associated with STEC non-O157 strains have also increased and is often under recognized due to diagnostic limitations. In 2012, the Food …
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Thermal Inactivation of Escherichia coli O157:H7 and Salmonella Agona in Wheat Flour
… of a multi-state outbreak of Escherichia coli O157:H7 associated with ready-to-bake cookie dough. Several cookie dough manufacturers are currently using heat-treated flour for ready-to-bake products, although data on thermal inactivation of foodborne pathogens in wheat flour remains scarce. The …
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Peri-slaughter ecology of Escherichia coli O157 and Salmonella enterica in feedlot beef cattle
Risk factors for prevalence of E. coli O157 prior to slaughter and the genotypic relationship between feedlot and slaughter isolates were investigated. The odds of E. coli O157 positive fecal samples from cattle fed brewers grains were 6 times that for cattle not fed brewers grains. The odds of E. …
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Survival and recovery of Escherichia coli O157:H7 during starvation at sub-optimal temperatures
Escherichia coli O157:H7 is an important foodborne pathogen with a dual lifestyle of growth within a host and persistence in non-host environments. Environmental survival of E. coli O157:H7 is particularly important in New Zealand due to the increasing trend in notified clinical cases, with most …
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Survival of Enterohemorrhagic Escherichia Coli O157:H7 During the Manufacture and Curing of Cheddar Cheese
… ability of enterohemorrhagic Escherichia coli O157:H7 to survive a standard Cheddar cheese manufacturing process was determined using active lactic mesophilic starter culture and subsequent curing. This strain of E. coli can survive under more adverse intrinsic and extrinsic conditions than …
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Modeling for thermal resistance of non-O157 shiga toxin producing Escherichia coli in ground beef
… study, a predictive inactivation model for non-O157 shiga toxin producing <em>Escherichia coli</em> (STEC) in ground beef was developed. Six strains of non-O157 STEC; <em>E. coli</em> O26:H1, <em>E. coli</em> O45:H2, <em>E. coli</em> O103:H2, <em>E. coli </em>O111:H8, <em>E. coli</em> O121:H9, …
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Thermal inactivation of Salmonella and Escherichia coli O157:H7 in heat treated, recycled used cooking oil
… set of strains of Salmonella and E. coli O157:H7 in heat treated, recycled used cooking oil, (ii) estimate D- and z-values for a selective set of strains of Salmonella and E. coli O157:H7 in heat treated, recycled used cooking oil, and (iii) establish time/temperature processing steps …
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High resolution meltcurve PCR assay for detection of salmonella and escherichia coli O157:H7 in foods
… associated with Salmonella and Escherichia coli O157:H7 have become world-wide public-health problems. Conventional methods for the identification of foodborne pathogens are tedious, expensive, and time-consuming. Alternatively, real-time PCR (RT-PCR) as a promising method to detect pathogens in …
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Intervention Strategies for Escherichia coli O157:H7 and Salmonella in Organic Soil and on Fresh Produce
… foodborne diseases caused by Escherichia coli O157:H7 and Salmonella have been increasingly associated with the consumption of fresh produce. Consumers' demand for safe, natural products has led to research on natural antimicrobials for effective control of foodborne pathogens on fresh produce, …
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