Дисертації з теми "Pathogen reservoir"
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Marien, Joachim, Benny Borremans, Sophie Gryseels, Barre Soropogui, Bruyn Luc De, Gedeon Ngiala Bongo, Beate Becker-Ziaja, et al. "No measurable adverse effects of Lassa, Morogoro and Gairo arenaviruses on their rodent reservoir host in natural conditions." BIOMED CENTRAL LTD, 2017. http://hdl.handle.net/10150/624077.
Повний текст джерелаRacicot, Bergeron Catherine. "Food animal reservoir for extraintestinal pathogenic «Escherichia coli» causing human infections." Thesis, McGill University, 2011. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=104886.
Повний текст джерелаLes études portant sur les infections extra-intestinales causées par des souches d'Escherichia coli génétiquement apparentées, chez des personnes non reliées entre elles, ont démontré le potentiel épidémique de ce groupe de bactéries. Ces souches d'E. coli pathogènes extra-intestinales (ExPEC) apparentées auraient possiblement une source commune. Notre groupe a récemment décrit comment la viande de détail, plus particulièrement le poulet, pourrait être un réservoir d'ExPEC responsables d'infections urinaires (IUs) chez les humains. En se déplaçant plus en amont dans le continuum de la ferme à la fourchette, cette étude teste si le réservoir d'ExPEC se trouve dans les animaux de production eux-mêmes. Un total de 824 isolats d'E. coli de provenances géographique et temporelle communes, prélevés dans le contenu caecal d'animaux abattus (n=349) et de cas d'IU humaine (n=475) ont été comparés. Par l'utilisation de 6 différentes méthodes de typage, une relation évolutionnaire a été observée entre les isolats d'E. coli provenant du réservoir animal et d'IU humaine. De plus, le poulet était l'espèce animale prédominante parmi les isolats parentés. L'utilisation d'un modèle évolutionnaire a permis de déterminer que le poulet est la source la plus probable des isolats d'IU humaine. Cette étude a confirmé qu'un réservoir animal, principalement chez le poulet, pourrait exister pour les ExPEC qui causent des IUs acquises en communauté.
Perkins, Tracy. "The role of estuarine sediments as a reservoir for pathogenic microorganisms." Thesis, Bangor University, 2015. https://research.bangor.ac.uk/portal/en/theses/the-role-of-estuarine-sediments-as-a-reservoir-for-pathogenic-microorganisms(3683144c-e7f1-4753-8749-72f3e0378935).html.
Повний текст джерелаNowak, Kathrin [Verfasser]. "African fruit bats as potential reservoir for zoonotic pathogens - the example of Escherichia coli / Kathrin Nowak." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1176639382/34.
Повний текст джерелаNowak, Astrid Kathrin [Verfasser]. "African fruit bats as potential reservoir for zoonotic pathogens - the example of Escherichia coli / Kathrin Nowak." Berlin : Freie Universität Berlin, 2018. http://nbn-resolving.de/urn:nbn:de:kobv:188-refubium-23453-4.
Повний текст джерелаMaaz, Denny [Verfasser]. "The influence of co-infections on the reservoir competence of peridomestic rodents for tick-borne pathogens / Denny Maaz." Berlin : Freie Universität Berlin, 2019. http://d-nb.info/1176634933/34.
Повний текст джерелаSproston, Emma L. "Ruminant reservoirs and invertebratevectors for transfer of human pathogens to vegetable crops and ready-to-eat foods." Thesis, University of Aberdeen, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.495927.
Повний текст джерелаNygren, Tomas, and Claes Johansson. "Draining the Pathogenic Reservoir of Guilt? : A study of the relationship between Guilt and Self-Compassion in Intensive Short-Term Dynamic Psychotherapy." Thesis, Linköpings universitet, Institutionen för beteendevetenskap och lärande, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-119217.
Повний текст джерелаStaley, Christopher. "Investigation of Reservoirs of Fecal Indicator Bacteria and Water Quality on the Presence of Allochthonous Pathogens and the Ecology and Virulence of Vibrio vulnificus." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4228.
Повний текст джерелаThelaus, Johanna. "The aquatic microbial food web and occurence of predation-resistant and potentially pathogenic bacteria, such as Francisella tularensis." Doctoral thesis, Umeå universitet, Ekologi, miljö och geovetenskap, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1620.
Повний текст джерелаCaucci, Serena [Verfasser], Thomas [Gutachter] Berendonk, Thomas [Akademischer Betreuer] Berendonk, Peter [Gutachter] Krebs, Fiona [Gutachter] Walsh, and Hauke [Akademischer Betreuer] Harms. "Reservoirs of antibiotic resistance and pathogens in bacterial communities of anthropogenically - driven environments / Serena Caucci ; Gutachter: Thomas Berendonk, Peter Krebs, Fiona Walsh ; Thomas Berendonk, Hauke Harms." Dresden : Technische Universität Dresden, 2018. http://d-nb.info/1226813909/34.
Повний текст джерелаViksten, Jeff. "Effects on Groundwater Composition by the Koga Irrigation Scheme." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-293425.
Повний текст джерелаTillgång till rent dricksvatten är en av de viktigaste resurserna för samhället såväl som varje enskild människa. Utan tillgång till rent dricksvatten kan hälsa och livs-kvalitet komma att påverkas av vattenburna patogener.I torra länder som Etiopien med periodisk torka har man gjort insatser för att hushålla med vattnet utöver regnperioderna. Ett exempel på detta är Kogadammen i Merawi, där en fördämning har konstruerats för att förse ett område med konst-bevattning. Genom bevattning ett område ändrar man de hydrologiska förhållanden som råder vilket gör att grundvattnets sammansättning kan komma att ändras.Denna rapport syftar till att försöka samla in data som stödjer teorin att konst-bevattningen i området påverkar grundvattnets sammansättning. Prover av grund-vatten och ytvatten samlades och jämfördes för att se om några slutsatser kunde dras. Också allmänna dricksvatten parametrar ingick såsom förekomsten av bio-logiska patogener. Antalet prover som tagits är ensamt inte tillräckligt för att dra slutsatser, men när de kombineras med data från tidigare fältarbete i området och litteraturstudier stödjer de antagandet om att konstbevattningen i området påverkar grundvattensammansättningen.
Barrett, Cindy L. "Range-wide Prevalence and Impacts of Pseudocercosporella inconspicua on Lilium grayi and an Assessment of L. superbum and L. michauxii as Reservoirs." Digital Commons @ East Tennessee State University, 2017. https://dc.etsu.edu/etd/3249.
Повний текст джерелаKeirnan, Elizabeth Carole. "Investigating the host range and origins of Phoma koolunga (Ascochyta blight of field pea)." Thesis, 2020. http://hdl.handle.net/2440/124906.
Повний текст джерелаThesis (MPhil) -- University of Adelaide, School of Agriculture, Food and Wine, 2020
Caucci, Serena. "Reservoirs of antibiotic resistance and pathogens in bacterial communities of anthropogenically - driven environments." Doctoral thesis, 2016. https://tud.qucosa.de/id/qucosa%3A31990.
Повний текст джерелаCordeiro, Roniele Peixoto. "Bacterial starter cultures and probiotics as reservoirs of antibiotic resistance transmissible to zoonotic pathogens." 2010. http://hdl.handle.net/1993/21666.
Повний текст джерелаLogtenberg, Jana. "An assessment of chiropractic adjustment beds as reservoirs for normal flora and infectious bacterial pathogens at a chiropractic teaching clinic." Thesis, 2009. http://hdl.handle.net/10321/458.
Повний текст джерелаBackground: Research has indicated the majority of bacteria on chiropractic adjustment beds (beds), can persist on dry inanimate surfaces for months. Thus, insufficient disinfection procedures create continuous sources of pathogens endangering patients and healthcare workers alike. This research study aimed to assess the beds as reservoirs for micro-organisms, at a chiropractic teaching clinic (clinic) in South Africa. Method: A selection of samples obtained from the headrests and armrests of the beds were serially diluted, plated in duplicate (using the spread plate technique) and incubated for 24-48 hours at 37°C. After inspection for the presence of micro-organisms, those present were enumerated to determine their quantities, the microbial build-up throughout the day, as well as the degree of the transmission from the patients to the beds during treatment. The incidence of the micro-organisms was established, along with their identities, using microscopic and macroscopic characteristics. These micro-organisms were also used to assess the efficacy of the disinfectant currently in use by the clinic. Results: Microbial growth was present on 89.4% of the beds sampled. The quantities of the micro-organisms increased significantly (p=0,027) from 7:30 am to 16:30 pm, with the median increasing from 25 colony forming units (cfu) / cm2 to 714 792 cfu/ cm2. The microbial build-up was highly significant (p<0.001), with a median of 346 cfu/ cm2 at 7:30 am and 10:30 am; increasing to 162 291 cfu/ cm2 by 13:30 pm and 250 million cfu/ cm2 by 16:30 pm. There was also a significant increase (p<0.001) in the quantity of micro-organisms during treatment with a median of 0 cfu/ cm2 before treatment that rose to 23 479 cfu/cm2 after treatment, indicating that the micro-organisms present on the beds were being deposited by the patient`s skin during the treatment. The most prevalent micro-organisms identified were Staphylococci and Serratia, with an average of 59% and 40% of colonies; while Micrococci and Bacilli were relatively uncommon. No growth was evident after 5 minutes of exposure to the disinfectant during the growth inhibition test. For the Kirby Bauer test, the average size of the zone of inhibition increased as the dilution decreased. The disinfectant is effective but more so against the Gram-positive than the Gram-negative bacteria. The disinfectant was 5,0, 5,5 and 5,6 times more effective than phenol in eradicating Staphylococci, Serratia and Bacilli, respectively. Conclusions and Recommendations: This study showed that micro-organisms were present on the beds. Staphylococci and Serratia have been implicated in many healthcare associated infections. The present disinfectant is effective, but should be used in between every patient. A different or additional disinfectant that is more effective against the Gram-negative bacteria should be considered for future use.
Banda, Ntshunxeko Thelma. "Characterization of E. coli strains from rural communities in the Vhembe District (Limpopo South Africa)." Diss., 2019. http://hdl.handle.net/11602/1489.
Повний текст джерелаDepartment of Microbiology
Background: Escherichia coli is a facultative anaerobic bacterium that forms part of the gut microbiota. It is used as an indicator that confirms recent faecal contamination. E. coli have been identified amongst the pathogens that are mostly responsible for moderate to severe diarrheal outbreaks in the low and middle-income countries. With South Africa facing an issue in water scarcity, issues concern poor sanitation and hygiene practices results in serious public health problems and allows E. coli to be transmitted from infected human or animal faeces to a new susceptible host using environmental reservoirs such as soil, water, hands as the transmission pathway. Objective: The primary objective of the study was to characterize E. coli strains from rural communities of Vhembe district, Limpopo, South Africa. Methodology: Households of 7 villages in the Vhembe district were randomly selected. A total of 81 households (HHs) were part of the study. In each household, a structured questionnaire was used to background information on WASH practices. Samples taken from each HH included toilet seat swabs, floor swabs, child and mother handwash samples, stored water samples and running tap water samples. A total of 399 samples were analysed using Colilert® Quanti-trays®/2000 method to detect the presence of Escherichia coli. Positive E. coli samples were further identified using multiplex polymerase chain reaction (m-PCR) to determine the pathogenic strains of E. coli. Transmission pathways were established using identified strains. Results: Data from the structured questionnaires showed common problems of availability of running tap water; lack of provision of sanitation; open practice on defaecation and very little hand hygiene practices. A total of 91 (22.81%) samples tested positive for E. coli with the Colilert® Quanti-trays®/2000 method. The mothers’ handwash samples had the most E. coli prevalence followed by stored water samples. The most prevalent E. coli pathotype was EPEC with the virulence gene eae. Atypical EPEC (60.44%) outnumbered the typical EPEC (5.49%). The pathotype ETEC was detected in 41.76% samples and EHEC in 9.89% samples. Transmission pathway was observed from the different households; with eae gene (aEPEC) being the most detected from samples looking at the LT gene (ETEC). v | P a g e Discussion: All 7 villages are facing common issues such as lacking running water, poor sanitation and improper hand hygiene practices. The mothers were the most contaminated and it was observed that its due to the daily activities that they perform around the house. It is of importance for them to practice proper hand hygiene to prevent transmission of pathogenic E. coli to the children via direct or indirect transmission route. The pathogenic E. coli was detected from all different samples collected from the households including the floor and toilet seat samples. EPEC was detected the most, and studies have shown that this strain is known to cause diarrheal infections in young children from developing countries. Conclusion: The members of the study village households were aware of the WASH services and its importance. However, proper implementation into their day-to-day life is lacking due to the high number of TC and E. coli detected from handwash samples and stored water samples from the households. Recommendation: Appropriate WASH strategies should be established to ensure good health at the village households. Further studies should be done to check possible transmission pathways from more village households.
NRF
Hallmaier-Wacker, Luisa. "Metagenomics in One Health — from standardization to targeted application." Thesis, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0005-1382-2.
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