Global ETD Search

121	Epidemiologie, Klinik, Ausbruchs- und Therapiemanagement von Krankenhausinfektionen durch Carbapenemase bildende Klebsiella pneumoniae und Toxin produzierende Stämme von Clostridium difficile Lübbert, Christoph 24 March 2015 (has links) Die Mehrzahl der jährlich 400.000 bis 600.000 Krankenhausinfektionen in Deutschland wird von Erregern der sog. ESCAPE-Gruppe (Enterococcus faecium, Staphylococcus aureus, Clostridium difficile, Acinetobacter baumannii, Pseudomonas aeruginosa und verschiedene Enterobacteriaceae, u.a. Klebsiella pneumoniae) verursacht. Besondere Sorge bereitet dabei die Ausbreitung von K. pneumoniae-Stämmen mit enzymvermittelter Resistenz gegenüber Carbapenem-Antibiotika (K. pneumoniae-Carbapenemase, KPC) und die Zunahme von C. difficile-Infektionen (CDI) durch hypervirulente Epidemiestämme (z.B. Ribotyp 027). Die spezifischen Erfahrungen eines prolongierten Ausbruchsgeschehens durch einen KPC-bildenden K. pneumoniae-Stamm (KPC-KP) am Leipziger Universitätsklinikum machen deutlich, dass bei diesem Erregertyp ein hohes Transmissionspotential bei enormer Tenazität (Umweltresistenz) zu berücksichtigen ist, ein Versagen von Standardhygienemaßnahmen in Betracht zu ziehen ist, und Infektionsketten oftmals unklar bleiben. Die Anwendung von Antibiotika ist bei KPC-KP-Infektionen auf einzelne Substanzen (Colistin, Tigecyclin, Gentamicin) beschränkt und vor allem bei immunsupprimierten Patienten (z.B. Lebertransplantierte) mit einem relevanten Risiko des Therapieversagens behaftet. Die Therapie von CDI wird gerade bei Immunsupprimierten durch eine steigende Zahl an Rezidiven erschwert, die teilweise antibiotisch (Vancomycin, Fidaxomicin) nicht beherrschbar sind, so dass alternative Therapieverfahren wie die fäkale Bakterientherapie („Stuhltransplantation“) zur Anwendung kommen. CDI-Rezidive, aber auch eine dauerhafte intestinale Besiedelung mit multiresistenten Enterobakterien wie KPC-KP, scheinen neben wirtsspezifischen Faktoren der Immunantwort durch eine Dysregulation der physiologischen intestinalen Standortflora mit Störung der Kolonisationsresistenz bedingt zu sein. Der Versuch einer Eradikationsbehandlung von Patienten mit persistierender intestinaler Besiedelung durch KPC-KP mittels oraler Applikation der nicht resorbierbaren Antibiotika Colistin und Gentamicin ist mit einem relevanten Risiko der Entstehung von Sekundärresistenzen behaftet. Die Zulassung neuer, besser wirksamer Antibiotika ist für die nächsten Jahre nicht in Sicht, so dass der Infektionsprävention überragende Bedeutung zukommt. Die Erfahrungen der KPC-Ausbruchsbewältigung am Leipziger Universitätsklinikum zeigen, dass nahezu lückenlose Compliance bei der Händedesinfektion, rigoros praktizierte und kontrollierte Barriere- und Isolationsmaßnahmen, Optimierung des Gebrauchs von Breitspektrum-Antibiotika (sog. „Antibiotic Stewardship“) und systematisches mikrobiologisches Erregerscreening dabei unabdingbar sind. Nachhaltige Verbesserungen hinsichtlich der globalen Ausbreitung von multiresistenten Krankenhausbakterien werden sich nur durch grundlegende Umgestaltungen in Umwelt, Landwirtschaft, Tierzucht und Gesundheitswesen mit sparsamer und möglichst gezielter Anwendung von Antibiotika erzielen lassen. Um Risikopopulationen hospitalisierter Patienten vor potentiell lebensbedrohlichen Erregertransmissionen effektiv schützen zu können, sind erweiterte Surveillance und konsequent umgesetzte krankenhaushygienische Maßnahmen erforderlich. info:eu-repo/classification/ddc/610 ddc:610
122	Methicillin-resistant Staphylococcus Aureus in Canadian Hospitals from 1995 to 2007: A Comparison of Adult and Pediatric Inpatients Locke, Tiffany 12 September 2013 (has links) The literature directly comparing the epidemiology of MRSA among adult and pediatric hospitalized patients is strikingly minimal. The objective of this thesis was to identify any differences between these two patient groups. The Canadian Nosocomial Infections Surveillance Program MRSA data (1995 to 2007: n=1,262 pediatric and 35,907 adult cases) were used to compare MRSA clinical and molecular characteristics and rates. Hospital characteristics were modeled using repeated measures Poisson regressions. The molecular and epidemiological characteristics of MRSA differed significantly between adults and children. Compared to children, MRSA in adults was more likely to be healthcare-associated, colonization, SCCmec type II, PVL negative, and resistant to most antibiotics. Rates of MRSA in Canada increased in both populations over time but were significantly higher in adults. The hospital characteristics associated with increased MRSA rates differed in adult and pediatric facilities. Implications for infection prevention and control strategies are discussed. Epidemiology Humans Cross Infection Hospitals Drug resistance, antimicrobial Infant Child Infant, newborn Child, preschool Age factors Sentinel Surveillance Population Surveilance Canada Hospitals, pediatric Community-Acquired Infections Hospitalization Methicillin Resistance Incidence Molecular Epidemiology Molecular Typing Cluster Analysis Staphylococcal Infection/epidemiology Healthcare Associated Infections Panton-Valentine leukocidin Age Groups Adult Aged Nosocomial Infections MRSA Adolescent Aged, 80 and over Young adult Drug Resistance, Multiple, Bacterial Infection Control Infection Control Practitioners Hospital Bed Capacity Bed Occupancy Pediatrics Epidemiologic Factors Health Facilities Risk Factors Length of Stay Patient Admission Staphylococcus aureus Public Health Agency of Canada
123	Methicillin-resistant Staphylococcus Aureus in Canadian Hospitals from 1995 to 2007: A Comparison of Adult and Pediatric Inpatients Locke, Tiffany January 2013 (has links) The literature directly comparing the epidemiology of MRSA among adult and pediatric hospitalized patients is strikingly minimal. The objective of this thesis was to identify any differences between these two patient groups. The Canadian Nosocomial Infections Surveillance Program MRSA data (1995 to 2007: n=1,262 pediatric and 35,907 adult cases) were used to compare MRSA clinical and molecular characteristics and rates. Hospital characteristics were modeled using repeated measures Poisson regressions. The molecular and epidemiological characteristics of MRSA differed significantly between adults and children. Compared to children, MRSA in adults was more likely to be healthcare-associated, colonization, SCCmec type II, PVL negative, and resistant to most antibiotics. Rates of MRSA in Canada increased in both populations over time but were significantly higher in adults. The hospital characteristics associated with increased MRSA rates differed in adult and pediatric facilities. Implications for infection prevention and control strategies are discussed. Epidemiology Humans Cross Infection Hospitals Drug resistance, antimicrobial Infant Child Infant, newborn Child, preschool Age factors Sentinel Surveillance Population Surveilance Canada Hospitals, pediatric Community-Acquired Infections Hospitalization Methicillin Resistance Incidence Molecular Epidemiology Molecular Typing Cluster Analysis Staphylococcal Infection/epidemiology Healthcare Associated Infections Panton-Valentine leukocidin Age Groups Adult Aged Nosocomial Infections MRSA Adolescent Aged, 80 and over Young adult Drug Resistance, Multiple, Bacterial Infection Control Infection Control Practitioners Hospital Bed Capacity Bed Occupancy Pediatrics Epidemiologic Factors Health Facilities Risk Factors Length of Stay Patient Admission Staphylococcus aureus Public Health Agency of Canada
124	Cellules suppressives d'origine myéloïde au cours du sepsis / Myeloid-derived suppressor cells in septic patients Uhel, Fabrice 19 May 2016 (has links) Le sepsis est à l’origine d’une dysfonction immunitaire prolongée responsable d’infections nosocomiales et d’une mortalité tardive élevée. Sa physiologie complexe demeure mal connue et il n’existe aucun traitement spécifique en dehors de l’antibiothérapie et des thérapeutiques de suppléance d’organes. Nous nous sommes intéressés au rôle des cellules myéloïdes dans cette dysfonction immunitaire. Nous avons pu montrer qu’il existe chez les patients atteints de sepsis une augmentation du nombre de cellules suppressives d’origine myéloïde monocytaires (M-MDSC) CD14+HLA-DRlow/- et granulocytaires (G-MDSC) identifiées comme des granulocytes de faible densité CD14-CD15+. Ces cellules sont responsables d’une activité Indoléamine 2,3-dioxygénase (IDO) et arginase 1, et leur déplétion permet de restaurer la prolifération des lymphocytes T in vitro. L’augmentation précoce des G-MDSC prédit la survenue ultérieure d’infections nosocomiales. De même, l’augmentation de l’activité IDO et de l’arginase 1 plasmatique sont associées à un mauvais pronostic. Au total, nous avons pu démontrer que les cellules myéloïdes acquièrent un phénotype suppresseur en partie responsable de l’immunodépression acquise et du pronostic péjoratif chez les patients septiques. Afin de restaurer les capacités immunitaires des patients, les MDSC pourraient devenir une future cible thérapeutique. / Sepsis results in a sustained immune dysfunction responsible for poor prognosis and nosocomial infections. Sepsis physiology remains poorly understood and no treatment exists currently, excepted from antibiotherapy and life-support techniques. We asked if myeloid cells could play a role in this sustained immune dysfunction. We demonstrated that Peripheral CD14+HLA-DRlow/- monocytic-myeloid-derived suppressor cells (MDSCs) and CD14-CD15+ low-density granulocytes identified as granulocytic- (G-)MDSCs were increased in septic patients. In vitro, arginase and IDO activities relied on MDSCs and depletion of both subsets restored T-cell proliferation. The initial proportion of G-MDSC predicted occurrence of nosocomial infections. Similarly, high plasma Indoleamine 2,3-dioxygenase (IDO) activity and arginase 1 level were associated with poor outcome. Altogether, our results demonstrate that myeloid cells acquire suppressive functions during sepsis, partially responsible for the sustained immune dysfunction and poor outcome. MDSCs may become a future therapeutic target to restore the immune capacities of septic patients. Sepsis Choc septique Infection Infections nosocomiales Immunologie Monocytes Granulocytes, neutrophiles Immunosuppression Arginase Arginine Tryptophane Lymphome diffus à grandes cellules B Sepsis Septic shock Infections Nosocomial infections Immunology Monocytes Granulocytes Neutrophils Arginase Arginine Tryptophan Diffuse large B cells lymphoma Myeloid-Derived suppressor cells Mdsc.
125	Investigation of peptide nucleic acid fluorescence in situ hybridization for diagnosis of ventilator-associated pneumonia in bronchoalveolar lavage specimens Phillips, Aaron M. 03 January 2014 (has links) Indiana University-Purdue University Indianapolis (IUPUI) QuickFISH PNA FISH VAP BAL ventilator-associated pneumonia bronchoalveolar lavage AdvanDx diagnosis Pneumonia -- Prevention Bronchoalveolar lavage -- Research Enteral feeding Artificial respiration -- Complications Airway extubation Nosocomial infections -- Transmission Peptides -- Biotechnology Nucleic acid probes -- Research Gastric acid -- Pathophysiology
126	Nurses perceptions of the factors contributing to the spread of tuberculosis in a clinic in the Odi Moretele sub district of Gauteng Molele, Mahlodi Annah 06 1900 (has links) Introduction: Despite being one of the most preventable diseases, TB still remains a serious and largely neglected disease. Nurses as compared to the general population are at greater risk of acquiring nosocomial TB. This study was conducted to describe the perceptions of nurses on the underlying contributory factors that may lead to the spread of TB in the clinics treating TB patients. Methods: Quantitative, non – experimental, descriptive, exploratory and cross sectional design was used. A structured and pretested questionnaire was used. Findings: The key contributory factors identified were insufficient TB training for staff and lack of knowledge on the TB legislative framework and TB policy directives. Conclusion: The findings indicate the need for a comprehensive TB infection prevention and control policy, with associated standards for provision and practice. / Health Studies / M.A. (Public Health) Health care workers Health care facilities Prevention Perception Tuberculosis and risk factors 616.9950231
127	Nurses perceptions of the factors contributing to the spread of tuberculosis in a clinic in the Odi Moretele sub district of Gauteng Molele, Mahlodi Annah 06 1900 (has links) Introduction: Despite being one of the most preventable diseases, TB still remains a serious and largely neglected disease. Nurses as compared to the general population are at greater risk of acquiring nosocomial TB. This study was conducted to describe the perceptions of nurses on the underlying contributory factors that may lead to the spread of TB in the clinics treating TB patients. Methods: Quantitative, non – experimental, descriptive, exploratory and cross sectional design was used. A structured and pretested questionnaire was used. Findings: The key contributory factors identified were insufficient TB training for staff and lack of knowledge on the TB legislative framework and TB policy directives. Conclusion: The findings indicate the need for a comprehensive TB infection prevention and control policy, with associated standards for provision and practice. / Health Studies / M.A. (Public Health) Health care workers Health care facilities Prevention Perception Tuberculosis and risk factors 616.9950231

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