Dissertations / Theses on the topic 'Bakterielle Infektion'
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Hussein, Ziyad. "Nachweis atypischer Mykobakterien im Leitungswasser mittels quantitativer PCR und Kultur." [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:289-vts-63146.
Full textGalke, Daniela. "Infektion mit Anaplasma phagozytophilum beim Hund eine Studie über Prävalenz, Prävention, Klinik." Berlin mbv, Mensch-und-Buch-Verl, 2009. http://d-nb.info/1000808653/04.
Full textThielen, Thomas. "Optimierung der Tragfähigkeit von antibiotikabeladenen PMMA-Hüftinterimsprothesen." Aachen Shaker, 2009. http://d-nb.info/1001353560/04.
Full textLuarca, de Alt Katja Pamela. "Untersuchungen zur geno- und phänotypischen Charakterisierung der aviär pathogenen E. coli (APEC)-Mutante M12A09, die eine Transposoninsertion im Gen pyrD trägt." Berlin mbv, 2008. http://d-nb.info/998068012/04.
Full textBruce-Micah, Regina Beatrice. "Untersuchungen zur Pharmakokinetik endogener und exogener Fluorophore und deren Einsatz zur photodynamischen Inaktivierung medizinisch relevanter Mikroorganismen." Duisburg Köln WiKu, 2009. http://d-nb.info/992415721/04.
Full textSterns, Theobald. "Serum-Zytokinspiegel und Empfindlichkeit für Super-Infektionen im Maus-Sepsismodell." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=976799057.
Full textKamphorst, Annemarie [Verfasser]. "Verhalten der Biomarker für akute Herzinsuffizienz und bakterielle Infektion im Verlauf prolongierter Intensivtherapie / Annemarie Kamphorst." Mainz : Universitätsbibliothek der Johannes Gutenberg-Universität Mainz, 2020. http://d-nb.info/1224810910/34.
Full textManiar, Amudhan. "The functional importance of CD177 on neutrophil in interaction with endothelium." Giessen : VVB Laufersweiler, 2007. http://d-nb.info/987804235/04.
Full textMichalzik, Monika. "Entwicklung eines mikrofluidischen Analysesystems zum immunologischen Proteinnachweis." Aachen Shaker, 2008. http://d-nb.info/993086977/04.
Full textLübbert, Christoph, Lisa Zimmermann, Julia Borchert, Bernd Hörner, Reinier Mutters, and Arne C. Rodloff. "Epidemiology and recurrence rates of Clostridium difficile infections in Germany." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-213878.
Full textRad, Roland. "Bakterielle Virulenzfaktoren und genetische Faktoren des Menschen bei der Entstehung von schweren histologischen Veränderungen der Magenmukosa während der Helicobacter-pylori-Infektion." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973068167.
Full textKöhler, Torsten. "Untersuchungen zum Einfluß von antibiotischen Leistungsförderern und ionophoren Antikokzidia auf die Inzidenz der Clostridium perfringens-Enterotoxämie des Huhnes nach experimenteller Infektion." Doctoral thesis, Universitätsbibliothek Leipzig, 2004. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-36639.
Full textInvestigations with 825 chickens in 33 trials were performed in order to find out the prophylactic effect of selected antibiotic growth promoters [avilamycin (10 ppm), avoparcin (15 ppm) virginiamycin (20 ppm)] and polyether ionophore antibiotics [monensin (100 ppm), narasin (70 ppm)] on the incidence of Clostridium (Cl.) perfringens enterotoxemia (CPE) in chickens as well as the therapeutic resp. metaphylactic influence of tylosin [Tylan 0,5 g/l H20]. The enterotoxemia could be reproduced regularly by intraduodenal infection with high numbers of vegetative cells of Cl. perfringens type A (ATCC 3624). The morbidity rate always reached 100 %. In spite of a profuse and watery diarrhoea the chickens normally showed no further considerable disturbances of the general status. Apathy or anorexia were rather rare and immediately followed by Exitus letalis of the related chickens. It was striking that the infected and non-medicated broilers contracted the disease more quickly and for a longer time. The mortality rate among the infected and non-medicated animals was 16 to 36 %, among the medicated groups max. 8 %. Tylosin showed a considerable metaphylactic effect in decreasing CPE mortality. The avoparcin group showed the best weight gain among the growth promoters, comparable to the results by means of the combinations [avilamycin + monensin or narasin] or narasin only. Decreasingly avilamycin, virginiamycin and monensin were less successful. Analysing the faecal resp. ileocecal quantities of Cl. perfringens adduced only a few statistically guaranteed correlation with other results. There was no causal connection between numbers of Cl. perfringens and life weight development. It was impossible to discover a numerical threshold of germs responsible for the death of the chickens. Summarising all the results of the entire attempts the combinations of avilamycin and narasin resp. monensin were the most effective concerning the reduction of morbidity, mortality and life weight losses by CPE. By application of tylosin it was possible to stop the mortality rate quickly. But it needs more time to achieve reductions of the CPE related weight losses. The two polyethers and also avilamycin are still admitted in the European Union. Currently an abandonment of anticoccidial feed supplements seems to be impossible due to the present danger of coccidiosis in poultry. By means of monensin/narasin plus avilamycin the adverse health effects of interactions of both pathogens should be reduced. Presupposing susceptibility of the coccida this should be a notable contribution to a better controlling and to the prevention of CPE and coccidiosis, too
Rayes, Nada. "Experimentelle und klinische Untersuchung des Einflusses von Prä- und Probiotika auf bakterielle Translokation und postoperative Infektionen nach abdominalchirurgischen Eingriffen." Doctoral thesis, Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité, 2004. http://dx.doi.org/10.18452/13917.
Full textIn the present study, the impact of pre- and probiotics on bacterial translocation (BT) and postoperative bacterial infection rates was assessed. Due to methodological reasons, we first quantified BT following single liver (LR) and colon resection (CR) or a combination of both and analysed potential pathogenic mechanisms for BT. Then, we performed two prospective randomised clinical studies to analyse the influence of a single probiotic strain and a combination of different pre- and probiotics on the incidence of bacterial infections in patients with liver transplantation (OLT) or pylorus preserving partial pancreatoduodenectomy (PPPD). In the rat model, BT after LR mainly occurred in the liver and spleen, after CR mainly in the mesenteric lymph nodes (MLN) and spleen. BT was increased in the animals with combined operation, in parallel to the extent of liver resection. Probiotics significantly decreased the bacterial concentration in the MLN. Animals with a high cecal concentration of lactobacilli had significantly less BT than the others. CR led to an increase of cecal gramnegative bacterial concentrations and to a decrease of lactobacilli. No histological changes were observed in the intestine. Paracellular permeability for ions, but not for the larger molecule lactulose, was increased in the colon in all groups compared to the sham group. Probiotics had an influence on cecal bacterial concentration. In the first clinical study, postoperative oral administration of Lactobacillus plantarum and a fibre-enriched enteral diet significantly decreased bacterial infection rates after OLT compared to selective bowel decontamination and a fibre-free diet. Fibre and heat-inactivated Lactobacillus also led to a slight, but not significant decrease of infections. Mainly gut-derived bacteria were isolated. The second clinical study analysed the influence of a combination of four different lactic acid bacteria and fibres on bacterial infection rates after OLT and PPPD. Compared to fibres and placebo, infection rates were significantly lower after OLT and markedly lower after PPPD. In both studies, the study substances were well tolerated without serious side effects. BT even occurs following minor abdominal surgery and is caused by different mechanisms related to the kind of operation. Probiotics were able to diminish BT in the rat model as well as to decrease bacterial infection rates following major abdominal surgery in the clinical studies. As they are easy to administer and do not cause severe side effects, they could be useful in clinical practice.
Beermann, Wiebke [Verfasser]. "Histonmodifikationen in der Pathogenese bakterieller Infektionen / Wiebke Beermann." Berlin : Freie Universität Berlin, 2007. http://d-nb.info/1022412744/34.
Full textKöhler, Jens [Verfasser]. "Angeborene Immunmechanismen bei bakteriellen Infektionen im Mausmodell / Jens Köhler." Greifswald : Universitätsbibliothek Greifswald, 2011. http://d-nb.info/1013707656/34.
Full textScholz, Frank-Rüdiger. "Aktivierung von Hämozyten des Tabakschwärmers Manduca sexta nach bakteriellen Infektionen." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=963903055.
Full textVergoulidou, Maria [Verfasser]. "Untersuchungen zu nicht-bakteriellen Infektionen bei immunsupprimierten Patienten / Maria Vergoulidou." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2012. http://d-nb.info/102749854X/34.
Full textOsbahr, Sünja [Verfasser]. "Die funktionelle Bedeutung des Lungenepithels in der Entstehung chronischer Lungenveränderungen bei bakterieller Infektion / Sünja Osbahr." Lübeck : Zentrale Hochschulbibliothek Lübeck, 2015. http://d-nb.info/1065204132/34.
Full textOlbrich, Anke. "Die Rolle von bakteriellen DNA-Sequenzen (CpG) bei der Immuntherapie von retroviralen Infektionen." Doctoral thesis, [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968365906.
Full textBoth, Ulrich von [Verfasser]. "Untersuchungen der Wirt-Pathogen Interaktion bakterieller Infektionen auf molekularer Ebene / Ulrich von Both." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2019. http://d-nb.info/1214593429/34.
Full textStorr, Constanze. "Antiepitheliale Antikörper der Klasse D bei Patienten mit Autoimmunerkrankungen oder bakteriellen und viralen Infektionen." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971274231.
Full textKöckritz-Blickwede, Maren von [Verfasser]. "Die Bildung von extrazellulären DNA-Netzen in der Immunabwehr gegen bakterielle Infektionen / Maren von Köckritz-Blickwede." Hannover : Bibliothek der Tierärztlichen Hochschule Hannover, 2014. http://d-nb.info/105374322X/34.
Full textSchubring-Giese, Sophie [Verfasser]. "Häufigkeit und Charakteristika bakterieller und mykotischer Infektionen bei Patienten nach allogener Stammzelltransplantation / Sophie Schubring-Giese." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2014. http://d-nb.info/1057869953/34.
Full textSchwaiger, Karin. "Zum Vorkommen Transmissibler Spongiformer Enzephalopathien und bakterieller ZNS-Infektionen beim Reh-, Rot- und Gamswild in Bayern." Diss., lmu, 2003. http://nbn-resolving.de/urn:nbn:de:bvb:19-11660.
Full textRayes, Nada. "Experimentelle und klinische Untersuchung des Einflusses von Prä- und Probiotika auf bakterielle Translokation und postoperative Infektionen nach abdominalchirurgischen Eingriffen." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972615970.
Full textJennerjahn, Alexandra [Verfasser]. "Expression von Neutrophil Antigen B1 (CD177) auf neutrophilen Granulozyten bei Patienten mit schweren bakteriellen Infektionen / Alexandra Jennerjahn." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2015. http://d-nb.info/1071087789/34.
Full textHenken, Stefanie [Verfasser]. "Stellenwert des Biolumineszenz-Imagings bakterieller Infektionen zur Evaluation der Wirksamkeit neuer Antibiotika in der Maus / Stefanie Henken." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2011. http://d-nb.info/101347192X/34.
Full textWisniewska, Monika Dorota [Verfasser]. "Veränderungen im Spurenelementhaushalt bei Neugeborenen mit konnatalen bakteriellen Infektionen : der Kupfer/Zink-Koeffizient als ein neuer Biomarker bei Neugeborenen mit Early-Onset-Infektionen / Monika Dorota Wisniewska." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2020. http://d-nb.info/1206185562/34.
Full textVelin, Therese. "Prokalcitonin som markör för sepsis och bakteriella infektioner. Utprovning av en ny metod på Klinisk Kemi i Kristianstad." Thesis, Malmö högskola, Fakulteten för hälsa och samhälle (HS), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-26989.
Full textProcalcitonin is a 116 amino acid prohormone, normally produced in the thyroid c-cells and in the neuroendocrine cells in the lungs, in response to hypercalcemia. In infections and sepsis bacterial lipopolysaccharides and different cytokines stimulate cells throughout the body to produce procalcitonin. Several trials have been carried out to evaluate how measurements of procalcitonin can be used, partly to separate bacterial infections from non-bacterial, and partly to guide individual treatment with antibiotics. In these studies the use of antibiotics could be reduced, reducing the risk of developing bacterial resistance and the cost of treatment. The purpose of this trial is to investigate a new method for procalcitonin assay. The method is an automated immunoassay on an existing instrument in the department of Clinical chemistry in Kristianstad. Blood specimens from the departments of Clinical chemistry in Lund, who uses the same method and Malmö, who uses another automated immunoassay, were compared to the present method. Good agreement was found between Kristianstad and Lund, while the relationship between Kristianstad and Malmö was slightly weaker. Precision between days was satisfactory, totalling 4,5 % on the low control and 1,9 % on the high control. Precision within series was excellent, 1,4 % on average.
Frielinghaus, Lisa [Verfasser], and Barbara C. [Akademischer Betreuer] Kahl. "Erregerspektrum, Resistenzmuster und kalkulierte Initialtherapie bei bakteriellen Infektionen am Albert-Schweitzer-Hospital in Lambaréné / Lisa Frielinghaus ; Betreuer: Barbara Kahl." Münster : Universitäts- und Landesbibliothek Münster, 2015. http://d-nb.info/1138242969/34.
Full textFrielinghaus, Lisa Verfasser], and Barbara C. [Akademischer Betreuer] [Kahl. "Erregerspektrum, Resistenzmuster und kalkulierte Initialtherapie bei bakteriellen Infektionen am Albert-Schweitzer-Hospital in Lambaréné / Lisa Frielinghaus ; Betreuer: Barbara Kahl." Münster : Universitäts- und Landesbibliothek Münster, 2015. http://d-nb.info/1138242969/34.
Full textSicker, Ute [Verfasser]. "Risikoeinschätzung einer transfusionsbedingten bakteriellen Infektion von Yersinia enterocolitica aufgrund von Experimenten zur in vitro Kontamination von Blut und unter Einbezug von Daten aus Epidemiologie und Hämovigilanz / Ute Sicker." Gießen : Universitätsbibliothek, 2017. http://d-nb.info/1133478468/34.
Full textSchlag, Stephanie [Verfasser], and Johannes G. [Gutachter] Liese. "Mikrobiologie, Klinik und Antibiotika-Therapie invasiver bakterieller Infektionen an der Würzburger Universitäts-Kinderklinik zwischen 2006 und 2012 / Stephanie Schlag ; Gutachter: Johannes G. Liese." Würzburg : Universität Würzburg, 2017. http://d-nb.info/1149510404/34.
Full textRehling, Nico Sebastian [Verfasser], Jens [Akademischer Betreuer] Wiltfang, Andreas [Gutachter] Zautner, Simone [Gutachter] Scheithauer, and Martin [Gutachter] Oppermann. "Prävalenz bakterieller Infektionen bei psychiatrischen Erkrankungen – Zusammenhänge mit Alter, Verweildauer und F-Diagnosen / Nico Sebastian Rehling ; Gutachter: Andreas Zautner, Simone Scheithauer, Martin Oppermann ; Betreuer: Jens Wiltfang." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://d-nb.info/1208521764/34.
Full textSchlichting, Nadine. "Palmitat induzierte Expression von IL-6 und MCP-1 in humanen Detrusormyozyten vs. bakteriell induzierter Entzündungsreaktion - ein möglicher Zusammenhang zwischen diabetischen Stoffwechsel und Infektionen der Harnblase." Doctoral thesis, Universitätsbibliothek Leipzig, 2011. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-67731.
Full textBackground: Urinary tract infections (UTI) are more frequent in type-2 diabetes mellitus patients than in subjects with normal glucose metabolism. The mechanisms underlying this higher prevalence of UTI are unknown. However, cytokine levels are altered in diabetic patients and may thus contribute to the development of UTI. Increased levels of free fatty acids (FFA), as observed in obese patients, can induce IL-6 production in various cell types. Therefore we studied the effects of the free fatty acid palmitate and bacterial lipopolysaccharide (LPS) on interleukin-6 (IL-6) and monocyte chemotactic protein-1 (MCP-1) expression and secretion in cultured human bladder smooth muscle cells (hBSMC). Methodology/Principal Findings: Biopsies were taken from patients undergoing cystectomy due to bladder cancer. Palmitate or LPS stimulated hBSMC were analysed for the production and secretion of the IL-6, gp80, gp80soluble, gp130, MCP-1, pSTAT3, SOCS3, NF-kB and SHP2 by quantitative PCR, ELISA, Western blotting, and confocal immunofluorescence. In signal transduction inhibition experiments we evaluated the involvement of NF-kB and MEK1 in IL-6 and MCP-1 regulation. Palmitate upregulates IL-6 mRNA expression and secretion via NF-kB dependent pathways in a concentration- and timedependent manner. MCP-1 was moderately upregulated by palmitate but was strongly upregulated by LPS involving NF-kB and MEK1 dependent pathways. Soluble IL-6 receptor (gp80soluble) was downregulated by palmitate and LPS, while membrane-bound gp80 was moderately upregulated. LPS increased SOCS3 and SHP2, whereas palmitate only induced SOCS3. Secondary finding: most of the IL-6 is secreted. Conclusions/Significance: Bacterial infection (LPS) or metabolic alterations (palmitate) have distinct effects on IL-6 expression in hBSMC, (i) short term LPS induced autocrine JAK/STAT signaling and (ii) long-term endocrine regulation of IL-6 by palmitate. Induction of IL-6 in human bladder smooth muscle cells by fatty acids may represent a pathogenetic factor underlying the higher frequency and persistence of urinary tract infections in patients with metabolic diseases
Sothmann, Peter [Verfasser], and Bernd [Akademischer Betreuer] Salzberger. "Der Einfluss sozioökonomischer und soziogeographischer Determinanten auf das Risiko systemischer bakterieller Infektionen bei Kindern – Eine Fall-Kontroll-Studie in der periurbanen Zone der ghanaischen Großstadt Kumasi / Peter Sothmann ; Betreuer: Bernd Salzberger." Regensburg : Universitätsbibliothek Regensburg, 2016. http://d-nb.info/1122825218/34.
Full textSothmann, Peter Verfasser], and Bernd [Akademischer Betreuer] [Salzberger. "Der Einfluss sozioökonomischer und soziogeographischer Determinanten auf das Risiko systemischer bakterieller Infektionen bei Kindern – Eine Fall-Kontroll-Studie in der periurbanen Zone der ghanaischen Großstadt Kumasi / Peter Sothmann ; Betreuer: Bernd Salzberger." Regensburg : Universitätsbibliothek Regensburg, 2016. http://d-nb.info/1122825218/34.
Full textManig, Anja [Verfasser], Sandra [Akademischer Betreuer] Schütze, and Michael [Akademischer Betreuer] Weig. "Vergleich des Verlaufes bakterieller Infektionen des zentralen Nervensystems bei alten und jungen Mäusen am Beispiel der Escherichia coli- und Streptococcus pneumoniae-Meningitis / Anja Manig. Gutachter: Sandra Schütze ; Michael Weig. Betreuer: Sandra Schütze." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2015. http://d-nb.info/1069417394/34.
Full textStorm, Martin. "Identification and Characterization of Biomarkers in Bacterial Infections." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6509.
Full textLejon, Sara. "Evasion and Attack: Structural Studies of a Bacterial Albumin-binding Protein and of a Cephalosporin Biosynthetic Enzyme." Doctoral thesis, Uppsala : University Library Universitetsbiblioteket, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8399.
Full textDießelberg, Catharina [Verfasser], Roland [Akademischer Betreuer] Nau, and Fred [Akademischer Betreuer] Lühder. "Activin A und Follistatin bei bakteriellen Infektionen - Der Einfluss von Activin A auf Mikrogliazellen in vitro und der Einfluss von Follistatin auf den Verlauf einer E. coli-K1-Sepsis im Mausmodell / Catharina Dießelberg. Gutachter: Roland Nau ; Fred Lühder. Betreuer: Roland Nau." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2012. http://d-nb.info/1044736364/34.
Full textSchlichting, Nadine [Verfasser], Matthias [Akademischer Betreuer] Blüher, (MPH) Andreas [Akademischer Betreuer] Oberbach, Jochen [Akademischer Betreuer] Neuhaus, Jens-Uwe [Akademischer Betreuer] Stolzenburg, and Jürgen [Akademischer Betreuer] Engele. "Palmitat induzierte Expression von IL-6 und MCP-1 in humanen Detrusormyozyten vs. bakteriell induzierter Entzündungsreaktion - ein möglicher Zusammenhang zwischen diabetischen Stoffwechsel und Infektionen der Harnblase / Nadine Schlichting. Gutachter: Jens-Uwe Stolzenburg ; Jürgen Engele. Betreuer: Matthias Blüher ; Andreas Oberbach (MPH) ; Jochen Neuhaus." Leipzig : Universitätsbibliothek Leipzig, 2011. http://d-nb.info/1020088761/34.
Full textBätzel, Carolin. "Verbesserung der medizinischen Versorgung und des Outcomes sehr kleiner und leichter Frühgeborener durch klinisches Benchmarking." Doctoral thesis, Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité, 2006. http://dx.doi.org/10.18452/15454.
Full textThis dissertation presents the results of a 1997 - 2001 benchmark project in co-operation with the "Berliner Klinik für Neonatologie der Charité Campus Mitte" and the "Abteilung für neonatologische Intensivmedizin der Universitätskinderklinik" in Innsbruck. The study is based on the Vermont-Oxford-Neonatal-Network''s data. After analysing the results, further evidence was analysed by way of literary research in PubMed and the Cochrane Database of Systematic Reviews. Afterwards, a questionnaire was created, lining out the clinical guidelines of the relevant outcome parameters. The respiratory distress syndrom, the necrotising enterocolitis and the bacterial infections were selected for the benchmark. The internal guidelines'' analysis showed that there were differences between the two clinics'' results in respiratory interventions, feeding and the management of infections. The discussion made clear that research based on further evidence is necessary in many fields.
Emge, Karoline. "Wertigkeit der Power-Doppler Sonographie bei der Erkennung von periprothetischen Infektionen." Doctoral thesis, 2011. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-66194.
Full textThe aim of this study was to evaluate the diagnostic value of the PDS at endoprosthetic replacement surgery of hip and knee. The main focus was a comparative study of the representation of the periprosthetic synovitis by PDS, the histological assessment according to the consensus classification by Morawietz and hygiene. Another aspect was to examine the reliability of the newly established consensus Classification by Morawietz. We had 83 patients, 33 men and 50 women, with an average age of 70 years (43 - 88 years) examined both before endoprosthetic revision by PDS, and preoperative laboratory and diagnostic, intraoperative sampling to determine the hygienic and histological assessment conducted by Morawietz. It was followed by a comparison of PDS with the results of the histology and the intra-operatively acquired Hygiene findings. In this study we couldn't find a significant correlation between the PDS and the histological results. Also, no significant correlation between the PDS and infections with septic causes (intraoperative pathogen detection, elevated inflammatory parameters to be determined). So we found out in this study, the PDS no suitable post in the process of preoperative diagnosis of endoprosthetic revisions supplies. Most significant was the positive predictive value in our study when comparing results of histological and microbiological findings. An investigation on the use of contrast medium-enhanced PDS in the assessment revisions of total hip and knee replacement would be useful. Nearly identical results brought the comparison of our histopathological data of the consensus classification of Morawietz et al. with published data. These results indicate a good definition of the criteria by Morawietz et al. and thus a reliable method for histopathological evaluation of the synovium
Sturm, Volker Jörg Friedrich. "\(^{19}F\) Magnetresonanztomographie zur Bildgebung von Infektionen im Zeitverlauf." Doctoral thesis, 2015. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-122851.
Full textThe main focus of this work is to investigate the potential of magnetic resonance imaging (MRI) to monitor the timecourse of bacterial infections in vivo. More specifically, it focuses on the ability to localize and assess an infection-induced localized bulky abscess using three different MRI methods: the utilization of native \(T_2\) contrast; the usage of super paramagnetic iron oxide nanoparticles (USPIO) as MRI \(T_2^*\) contrast agents; and the application of perfluorcarbons (PFC) as \(^{19}F\) MRI marker (see chapter 3). Study results demonstrated that, as expected the altered \(T_2\) values present in the abscess area permit localization of the infection when using \(T_2\) weighted data. The precise boundary of the abscess, however, could not be determined due to the gradual change of the \(T_2\) values in the area of the infection. Conforming to other studies [53, 58], the MR-detected accumulation of USPIO particles along the abscess rim allowed definition of a fairly exact demarcation line between the abscess and surrounding tissue during the chronic phase of the infection (day 9 p.i.). During the acute phase of the infection (day 3 p.i.), however, the particle accumulation at the abscess rim was too sparse for precise boundary definition [58]. Because of their extremely low biological abundance and the very short relaxation times of endogenous fluorine, PFCs can be imaged background-free in a biological system. Moreover, as emulsified PFCs were taken up by phagocytosing cells and accumulated at the site of inflammation [30, 59], the acquired MRI data showed PFC accumulation during both the chronic and acute phases of infection. It was thus possible to differentiate between the abscess and surrounding tissue at each examined time point. Due to the described advantages, PFCs were chosen to evaluate with MRI the infection severity. As a bacterial burden reference, colony forming units (cfu) and bioluminescence imaging (BLI) [49, 50] were selected. Observation of BLI, cfu and \(^{19}F\) MRI data showed qualitative correlation during the investigated time course. This was true for the accumulated \(^{19}F\) MR signal in the area of infection and for the \(^{19}F\) MR signal volume. Additionally, unlike the cfu method MRI and BLI are non-invasive and thus data can be gathered at multiple time points. However, contrary to BLI, MRI does not require a special pathogen strain. Moreover, it can provide morphological data from an abscess and the surrounding tissue. Because the data delivered by each of these three methods (MRI, BLI and cfu), are based on alternative approaches, additional examinations of the established platform are suggested. For example, the extent to which the methods supplement each other may provide deeper insight into the interaction between pathogen and host. Even though the chosen semi quantitative approach was sufficient in the context of the evaluated issues to estimate the relative fluorine amount at the site of infection, it is in general desirable for each quantification to determine the sensitivity of the coil per sample. To address this issue the Bloch Siegert (BS) based \(B_1\) mapping method implemented in a turbo/ multi spin echo (TSE/MSE) sequence is presented in Chapter 4 Bloch-Siegert \(B_1^+\)-Mapping. Such a sequence allows effective use of the relatively long PFC \(T_2\) times and encodes BS information solely into the phase data. Thus, a \(B_1\) map can be created in addition to the unaltered TSE/MSE magnitude image. In the context of \(^{19}F\) imaging, this is of special interest due to the usually low amounts of fluorine resulting in long measurement times. In conclusion, it was shown that MRI not only enables visualization of the temporal behavior of infections on the investigated animal model, but it can also provide quantitative information about the progress of the infection. Additionally, a method potentially allowing in vivo B1+ mapping was introduced. This is an important step to improve the reliability of relaxometry and absolute quantification of in vivo \(^{19}F\) MRI
Grosz, Magdalena Urszula. "Identification of phagosomal escape relevant factors in Staphylococcus aureus infection." Doctoral thesis, 2015. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-121981.
Full textStaphylococcus aureus ist ein fakultativ Gram-positives Humanpathogen, dass verschiedene schwerwiegende Infektionen verursachen kann. Staphylokokken werden von professionellen und nicht-professionellen Phagozyten (Fresszellen) zu gleich aufgenommen. Desweitern sind sie stark zytotoxisch für eukaryotische Zellen. Außerdem wird vermutet, dass sie sich mittels migrierender Phagozyten dem angeborenen Immunsystem entziehen können. In dieser Studie werden die post-invasiven Ereignisse während einer Staphylokokken Infektion untersucht. Im Detail wurden Stämme identifiziert die aus den Phagosomen entkommen können und die dafür verantwortlichen Toxine. Im Zuge dessen wurden neue Erkenntnisse der Interaktion zwischen Bakterien und Wirtszellen gewonnen. Eine neue Klasse von kleinen amphiphatischen Peptiden mit starken grenzflächenaktiven Eigenschaften (Surfactant), die sogenannten Phenol soluble modulins (PSMs) im Besonderen PSMα sowie das Leukozidin LukAB, sind am phagosomalen Ausbruch der klinisch relevanten S. aureus Stämmen LAC, MW2 und 6850 in nicht professionellen und professionellen Phagozyten involviert. Hingegen, sind PSMβ, δ-toxin, α-toxin, β-toxin oder Phosphatidylinositol abhängige Phospholipase C nicht am phagosomalen Ausbruch beteiligt. Durch die Hemmung der bakteriellen DNA-abhängigen RNA Polymerase mit Rifampicin wurde der Zeitpunkt für den Ausbruch auf etwa 2,5 Stunden nach der Infektion eingegrenzt. Der phagosomale Ausbruch ist weiterhin für die intrazelluläre Replikation von S. aureus notwendig. Während Stämme, die nicht ausbrechen können in der angesäuerten Vakuole nicht replizieren können, bietet das Zytoplasma ein reichhaltiges Milieu für die Vermehrung. Zudem wird der Pathogen induzierte Zelltod erst nach dem phagosomalen Ausbruch und mit anschließender Vermehrung ermöglicht. Nachgewiesen wurde dies mittels psmα und lukAB defizienten Mutanten welche signifikant weniger zytotoxisch waren als der Wildtyp Stamm. Diese Studie zeigt darüber hinaus, dass der phagosomale Ausbruch nicht nur durch bakterielle Toxine vermittelt wird. Sondern, dass die Phagozyten-spezifischen Rezeptoren für beide relevanten Toxine, FPR2 (PSMα Rezeptor) und CD11b (LukAB Rezeptor), in Epithel- und Endothelzellen nach Infektion mit S. aureus calciumabhängig produziert werden und für den Ausbruch notwendig sind. Der knockdown beider Rezeptoren mittels siRNA verhindert den Ausbruch. Wird der intrazelluläre Calciumstrom mittels des Inositoltrisphosphat Rezeptor (IP3R) Inhibitor 2-APB blockiert können die Gene fpr2 und cd11b nicht hochreguliert werden und der Ausbruch wird ebenfalls verhindert. Folglich zeigt diese Studie, dass der phagosomale Ausbruch und Pathogen induzierte Zelltod sowohl durch bakterielle Toxine als auch Wirtsfaktoren vermittelt wird
Schlag, Stephanie. "Mikrobiologie, Klinik und Antibiotika-Therapie invasiver bakterieller Infektionen an der Würzburger Universitäts-Kinderklinik zwischen 2006 und 2012." Doctoral thesis, 2017. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-156236.
Full textWe analysed invasive bacterial infections in children caused by the most common and important pathogens of bloodstream infections in children over a 7-year-period
Köhler, Rolf. "Entwicklung eines GFP-Reportersystems in Legionella und molekularbiologische Funktionsanalyse des Legionella Mip-Proteins." Doctoral thesis, 2000. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-1594.
Full textThe facultative intracellular bacterium Legionella pneumophila was first identified in 1977 as the etiologic agent of legionellosis, a severe and atypical pneumonia. It possesses a dual host system which allows the bacteria to replicate in protozoa in aquatic habitats as well as a pathogen in human phagocytic cells. In order to analyze the complex interaction of the bacterial pathogen and its host cells, in this thesis a new GFP reporter system was established and sussessfully evaluated. It is now possible to monitor a Legionella infection in vivo and to quantify bacterial invasion influenced by different factors in a more convenient way. To analyze GFP expression in Legionella a transcriptional fusion of the gfpmut2 gene with the Legionella-specific mip (macrophage infectivity potentiator) promoter was constructed. In addition, a vector habouring the sod (super oxid dimutase) promoter derived from Listeria monocytogenes was used. Following transformation into Legionella strains strong GFP-mediated fluorescence was detected confirming the functionality of GFP in Legionella for the first time. Using fluorescence microscopy, spectrofluorimetry and flow cytometry (FACS-analysis) the strains were examined regarding differences in virulence and intracellular replication. Re-confirming results from earlier studies obtained by using enumeration of CFU values showed the validity of the method. Quantification of the mip promoter activity revealed a constitutively expression, this indicates that differences in Legionella virulene are not due to variations in mip promoter activity. Moreover, the influence of different phagocytosis inhibitors on Legionella uptake into the protozoan hosts Acanthamoeba castellanii and Hartmannella vermiformis using the GFP reporter system was examined. Application of cytochalasin D had no influence on bacterial uptake in A. castellanii and H. vermiformis suggesting in microfilament-independent mechanism. Phagocytosis in H. vermiformis is mainly accomplished using receptor-mediated phagocytosis as it was evident from inhibition studies with cycloheximide and methylamine. In contrast, phagocytosis in A. castellanii is mediated by other receptors or additional mechanisms are available. This results confirm the proposed heterogeneity of uptake mechanisms by different protozoan hosts. After L. pneumophila is phagocytosed the endosomal pathway of phagosome maturation is blocked, by means of secreted but as yet unidentified effector molecules. To study a putative protein translocation C-terminal Mip::GFP fusion proteins were constructed. The stability of the proteins was rather weak which is likely due to the dimeric conformational state of the Mip protein. In addition, transport over the cytoplasmic membran was not accomplished. Therefore the fusion proteins proved not to be useful for examine translocational events. Because of the unknown in vivo function of bacterial PPIases the focus in the the second part of this work was to identify a putative interaction partner of the Mip protein and to elucidate the influence of dimerization and PPIase activity on Legionella's virulence. Using cross linking experiments a putative interaction partner could be detected. N-terminal sequencing revealed no homology to already known Legionella or other proteins. N-terminal blockade of the putative partner molecule may be the cause that hampered sequence identification. It has been shown that the isomerase activity of the Legionella Mip protein is not necessary for invasion and intracellular survival in protozoan, monocytes and U937 macrophages. Additional features of the protein are its homodimeric conformational state and the assoziation with the outer membrane. In cooperation with the group of Prof. Dr. G. Fischer in Halle a N-terminal truncated (aa 4-79) dimerization-deficient Mip protein (L.p.FKBP25-20-3, 80-213) was constructed and biochemically characterized. Using site specific mutagenesis participation of the N-terminal located amino acids (K11A/D32A, Y16A/D32A und M38,42E) in the dimerization of the Mip protein was confirmed. To analyze the influence on pathogenicity of the dimeric state of the Mip protein a mip negative strain was complemented by providing the gene encoding the monomeric Mip (L.p.FKBP25-20-3, 80-213) in cis. The proper integration and protein expression was confirmed. The results demonstrate that the isomerase activity is dispensable for intracellular growth in protozoan hosts. Moreover, the results clearly demonstrated that dimerization and not the isomearse activity are essential for virulence of Legionella in a monocellular system. In contrast, it could be shown that the isomerase activity is necessary for full virulence in the animal model (guinea pigs). The loss of the isomerase avtivity have a more dramatic impact on the intracellular survival of Legionella compared to the monocellular system (A. castellanii). Moreover, Legionella strains replicated intracellulary dependent on their remaining in vitro isomerase activity. Using the monomeric Mip expressing strain L.p.JR32-2.4 it could be demonstrated that dimerization also plays a role in the animal model. This work provides evidence for a different role of the isomerase activity of the Mip protein in monocellular systems and during the infection of higher organisms
Schmitz, Sabine. "Infektionen durch Mycoplasma pneumoniae in Franken in den Jahren 2000-2003 : Untersuchungen eines Ausbruches in Ebrach sowie stationärer Patienten der Universitätskinderklinik Würzburg." Doctoral thesis, 2010. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-51713.
Full textThis is a retrospective study of an outbreak of Mycoplasma pneumoniae infections between october 2000 and february 2001 in Ebrach, Franken, Germany. We wanted to get information about epidemiologic characteristics, such as spread of infection, clinical manifestations and complications, as well as influence of therapy, and possibilities of diagnostics. Furthermore we monitored patients with Mycoplasma pneumoniae infections which led to hospitalisation in the pediatric department of Würzburg university hospital and compared them to the patients in Ebrach. In Ebrach a total of 177 patients were thought to have an MP infection. It started in year 3 of primary school, where within 16 days 9 pupils suffered from pneumonia due to MP and 3 children had MP bronchitis. For this reason the pupils where not allowed to attend school for a few days. Beginning with the school children the infection reached 78 persons, mainly parents of the children but also neighbours and friends for example from the football team. Most of them suffered from coughs and fever. Manifestations were infections of the lower respiratory tract (38,5% pneumonia, 50% bronchitis), 9 patients suffered from cutaneous symptoms (exanthema). One patient had to be hospitalized because of a Guillain-Barre-syndrom. Between 2000 and 2003, 125 patients of the pediatric department of the Würzburg university hospital were thought to have MP infections. In 43 cases the MP infection was diagnosed. Patients were between 3 and 16 years old, there were bit more cases amongst males but females got more complications. Hospitalized patients showed more severe manifestatons (65% pneumonia) or complications (34%). These were for example 6 children with Bells palsy, 4 children with menigitis and one of each of the following manifestations: encephalitis, cranial nerve palsy of trochlearis and vestibularis, hearing loss, permyocarditis, uveitis anterior, nephrotic syndrom. No special symptoms which could be said to be pathognomonic were found in either Ebrach or amongst the hospitalized patients. The special constellation of pathological findings much rather suggests a diagnosis of an MP infection: cough, fever, quite good clinical condition, radiographic evidence of pneumonia, different wsg results at 37°C and 4°C. The incidence of MP infections among hospitalized patients did not increase during the time of the outbreak in Ebrach. It is already known that pupils are possible vectors but such a spread of MP infection in the classroom has seldom been observed before and needs further investigation. Serologic diagnosis needs more time because of the delayed immune response of the host and this is why pcr is often necessary. Antibiotic treatment with effective drugs such as macrolides should be taken into consideration early and administered for a long enough period
Rad, Roland [Verfasser]. "Bakterielle Virulenzfaktoren und genetische Faktoren des Menschen bei der Entstehung von schweren histologischen Veränderungen der Magenmukosa während der Helicobacter-pylori-Infektion / Roland Rad." 2004. http://d-nb.info/973068167/34.
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