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 32 for “"E. faecium"”.
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Development of Improved Genetic Methods for Enterococcus Faecium
<p>Enterococcus faecium is a ubiquitous Gram-positive bacterium that has been recovered from the environment, food, and microbiota of mammals. Enterococcus faecium is widely recognized as an emerging public health threat with the rise of drug resistance and nosocomial infections. Antibiotic usage …
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Determination of the occurrence, virulence genes, and antimicrobial resistance profiles of enterococcus faecalis and enterococcus faecium isolated from poultry of Chongwe, Lusaka, Kitwe, and Ndola districts, farmworkers from the Copperbelt province poultry farms and clinical specimens from Kitwe teaching hospital in Zambia.
… of Enterococcus faecalis and Enterococcus faecium isolated from poultry of Chongwe, Lusaka, Kitwe, and Ndola Districts, Farmworkers from the Copperbelt Province Poultry Farms, and Clinical Specimens from Kitwe Teaching Hospital in Zambia. A total of 833 samples comprising 492 poultry …
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Molecular and Genomic Based Insights Into The Evolution of Enterococcus Faecium From Commensal to Hospital-Adapted Pathogen
… for the recent transition of <em>Enterococcus faecium</em> from a primarily commensal organism to one of the leading causes of hospital-acquired infections in the United States is not yet understood. To address this, the first part of my project assessed isolates from early outbreaks in the USA …
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An investigation into the effects of shape and structure on the antibacterial efficacy of metal nanoparticles
… including Escherichia coli and Enterococcus faecium. E. coli O157:H7, which is known to be virulent and infectious, causing bowel discomfort, diarrhoea, nausea or vomiting. Enterococci frequently causes gastrointestinal infections, urinary tract infections, hepatobiliary sepsis, endocarditis …
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Untersuchungen zur Induktion und zum Transfer der Vancomycin-Resistenz vom VanA-Typ sowie zur Flavophospholipol-Resistenz in Enterococcus faecium
… welcher zuerst in Enterococcus faecium beschrieben wurde, ist die in Zentraleuropa vorherrschende Variante der Glycopeptidresistenz. Das Transposon Tn1546, das die vanA-Resistenzdeterminante kodiert, liegt häufig auf großen konjugativen Plasmiden vor und kann zwischen …
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Insights Into Determinants That Contribute to Colonization, Virulence and Antibiotic Resistance In Enterococci
… faecalis</em> and <em>Enterococcus faecium</em> are increasingly common as causative agents of human infections, many of which are very difficult to treat due to multi-drug resistance. The work presented in the first part of this dissertation elucidates a mechanism for the regulation …
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Inactivation Of Salmonella And Surrogate Bacteria On Cashews And Macadamia Nuts Exposed To Saturated Steam And Propylene Oxide Treatments
… to investigate the suitability of Enterococcus faecium, Pediococcus acidilactici, and Staphylococcus carnosus as surrogate bacteria for Salmonella spp. on whole cashews and macadamia nuts, processed with SS or PPO. Whole cashews and macadamia nuts were co-inoculated with a cocktail of Salmonella …
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Mecanismos de resistencia a antibióticos macrólidos, lincosamidas y estreptograminas en streptococcus y enterococcus
… with the exception of one isolate of E. faecium which presented the erm(A) gene. A new gene that we called msrC was detected in all E. faecium isolates, independently of their erythromycin resistance pattern. The remaining species of Enterococcus analyzed did not present msrC. The msrC …
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The relative importance of human and animal sources of vancomycin-resistant Enterococcus faecium in immunocompromised patients in hospital
Enterococcus faecium is a leading cause of hospital-acquired infection, disproportionally affecting immunocompromised and critically ill patients. Despite infection control measures, rates of vancomycin-resistant E. faecium (VREfm) bacteraemias have failed to decline in the United Kingdom, and …
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Biochemical Studies of Peptidoglycan Hydrolases from Commensal and Pathogenic Bacteria
… SagA from the commensal bacterium Enterococcus faecium. These methods also enabled the evaluation of features identified in the SagA-NlpC/p60 domain structure that may be important for binding peptidoglycan substrates. Moreover, SagA-generated peptidoglycan products can activate a pattern …
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Evaluating Methods of Improving Recovery of Sub-lethally Injured Salmonella in Low Moisture Foods Treated with Antimicrobial Gas
… multiple strains of S. enterica and Enterococcus faecium NRRL B2354, from chlorine dioxide or hydrogen peroxide treated low moisture foods (LMF) black peppercorns, dried basil leaves, and chia seeds. Also, this study aimed to compare the log reduction of these two microorganisms to evaluate E. …
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Thermal Modeling of Vacuum Assisted Steam Pasteurization for Improved Product Safety of Low Water Activity Foods
… for reduction of the bacteria Enterococcus faecium (E. faecium) on whole macadamia nuts and was used to predict the inactivation of E. faecium on macadamia nut pieces and pumpkin seeds using their respective dynamic temperature profiles predicted from the thermal models.
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Characterization of Bacterial Metabolites Involved in Host Pathogen Resistance
… used to investigate the effects of Enterococcus faecium on bacterial pathogenesis. Probiotic strains of E. faecium can inhibit the virulence of several intestinal pathogens, including Salmonella typhimurium, but it is unknown if E. faecium directly targets pathogens or modulates host immunity. …
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Mass Spectrometry for Determination of Conformation and Dynamics of Proteins and Structure and Biosynthesis of Bacterial Peptidoglycan
… the fine structure of <italic>enterococcus faecium</italic>: <italic>E. faecium</italic>) peptidoglycan. Furthermore, we developed a time-dependent isotopic labeling strategy and applied it to <italic>E. faecium</italic> during the cell wall growth to determine quantitatively the percentage …
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A study of the transmission pathways of organisms associated with nosocomial infections at a veterinary academic hospital
… mainly from the ESKAPE group (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species). Within the veterinary settings, this group of organisms is often zoonotic and tends to acquire resistance …
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Pharmacological Screening of Some Medicinal Plants as Antimicrobial and Feed Additives
… poultry pathogens E. coli, S. typhimurium, E. faecium, and E. faecalis. Cinnamon extract (CE), at 130 mg/disk, exhibited antibacterial activity against E. coli, S. typhimurium, and E. faecalis. Thyme extract (TE), at 30 mg/disk, exhibited antibacterial activity against E. coli, E. faecium, and …
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Potential of bacteriocin producing bacteria to control VRE infection
… behind vancomycin resistance in Enterococcus faecium and Enterococcus faecalis is discussed. Also discussed are the chemotherapeutic treatments currently in use in treatment of VRE infections. Finally, a number of novel alternatives to antibiotics such as bacteriocins and bacteriophage and …
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Κλινικοεργαστηριακή διερεύνηση της φορείας και των λοιμώξεων από πολυανθεκτικά στελέχη σε ασθενείς της Μονάδας Εντατικής Θεραπείας και των Μονάδων Αυξημένης Φροντίδας
… Συνολικά 107 στελέχη VRE απομονώθηκαν (100 E. faecium και 7 E. faecalis). Ογδόντα τέσσερα στελέχη έφεραν το γονίδιο vanA και ήταν ανθεκτικά στη βανκομυκίνη και στην τεϊκοπλανίνη, ενώ τα υπόλοιπα 23 έφεραν το γονίδιο vanB και χαρακτηρίζονταν από χαμηλού επιπέδου αντοχή στη βανκομυκίνη (12 …
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Towards the post-antibiotic era: The role of antibiotic resistant enterococci in different sources
… i risultati hanno evidenziato la dominanza di E. faecium in tutti i siti analizzati e un'alta prevalenza di AR nei riguardi di numerosi antibiotici. Attraverso l analisi PFGE numerosi profili unici sono stati ottenuti e la presenza dello stesso clone con differenti profili di resistenza, in …
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Molecular Mechanisms of Antimicrobial Resistance In Multi-Drug Resistant Enterococci
… in <em>E. faecalis </em>and <em>E. faecium, </em>potentially circumventing limitations of existing platforms. This dissertation identifies unprecedented mechanisms of antimicrobial resistance, providing us key insight into bacterial evolution and shows that these insights can be …
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