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Tesis sobre el tema "Bactera"

Autor: Grafiati
Publicado: 25 de enero de 2025
Última modificación: 31 de julio de 2025

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1

Thomas, Lee. "Genetic methods for Rapid Detection of Medically Important Nosocomial Bactera." Thesis, The University of Sydney, 2007. http://hdl.handle.net/2123/3575.

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The role of the microbiology laboratory is (1) to provide infection control information, so that highly transmissible isolates may be identified and appropriate control measures instigated as rapidly as possible and (2) to provide adequate information to the clinician enabling correct antibiotic choices to be made, particularly in the critically ill. Microbiological data is by definition slow as it is culture dependent: this study focused on the development of genetic, culture-independent methods for detection of resistance in nosocomial pathogens that could be introduced into the routine micr
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Thomas, Lee. "Genetic methods for Rapid Detection of Medically Important Nosocomial Bactera." University of Sydney, 2007. http://hdl.handle.net/2123/3575.

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Master of Science<br>The role of the microbiology laboratory is (1) to provide infection control information, so that highly transmissible isolates may be identified and appropriate control measures instigated as rapidly as possible and (2) to provide adequate information to the clinician enabling correct antibiotic choices to be made, particularly in the critically ill. Microbiological data is by definition slow as it is culture dependent: this study focused on the development of genetic, culture-independent methods for detection of resistance in nosocomial pathogens that could be introduced
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3

Almeida, Beatriz Silveira Viana de. "Análise do proteoma do fluído intercelular de folhas de laranjeiras infectadas com Xylella fastidiosa." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/11/11138/tde-24072002-164115/.

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Com o objetivo de compreender os mecanismos que regulam a interação citros-Xf procurou-se identificar e caracterizar proteínas com acúmulo diferencial no apoplasto de folhas de Citrus sinensis var. Pêra infectadas com Xf, apresentando ou não sintomas de CVC, através de eletroforese bidimensional em géis de poliacrilamida desnaturante e espectrometria de massa (MALDI-ToF). O fluído intercelular (FI) foi extraído de folhas de laranjeira cultivadas em campos experimentais. A presença ou ausência do patógeno foi confirmada por amplificação, através de PCR, de fragmentos específicos de DNA da bacté
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Bou, habib Michèle. "Développement et analyse d'un modèle dynamique d'attaque de phages lors de l'acidification du lait pour la fabrication du fromage." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASB061.

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Avec l'augmentation de la demande pour les produits fromagers, l'optimisation des procédés de production est devenue essentielle. L'une des premières étapes de la fabrication du fromage est l'acidification du lait, qui influence fortement les propriétés organoleptiques, la texture et la sécurité du produit final. Elle consiste à convertir le lactose, sucre du lait, en acide lactique par des bactéries lactiques. Cependant, ces bactéries sont sensibles aux attaques de virus appelés bactériophages. Ces attaques peuvent entraîner la lyse bactérienne, retardant ou arrêtant l'acidification, ce qui e
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Moyà, Anderico Laura. "Deciphering the utility of Galleria mellonella as an infection and toxicity in vivo model." Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/671803.

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Galleria mellonella (greater wax moth) is a popular animal model that has been extensively used as an alternative in vivo model for investigating the virulence and pathogenicity of different bacteria. G. mellonella has also been shown to be a suitable model for studying the efficacy and toxicity of various compounds. Recently, this model has been gaining popularity as the larvae are conveniently sized for manipulation, they do not need constant feeding, they are inexpensive to purchase and to breed, they do not require much space or special infrastructure, they present a low biohazard risk, an
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6

de, Klerk Nele. "Host-bacteria interactions : Host cell responses and bacterial pathogenesis." Doctoral thesis, Stockholms universitet, Institutionen för molekylär biovetenskap, Wenner-Grens institut, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-126425.

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Helicobacter pylori colonizes the human stomach, where it causes gastritis that may develop into peptic ulcer disease or cancer when left untreated. Neisseria gonorrhoeae colonizes the urogenital tract and causes the sexually transmitted disease gonorrhea. In contrast, Lactobacillus species are part of the human microbiota, which is the resident microbial community, and are considered to be beneficial for health. The first host cell types that bacteria encounter when they enter the body are epithelial cells, which form the border between the inside and the outside, and macrophages, which are i
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7

Gaviria, Cantín Tania Cristina. "Factores Gre de Salmonella enterica serovar Typhimurium, su papel en el control de la filosofía y patogenicidad." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/397788.

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El género Salmonella, está compuesto de bacterias Gram-negativas, no esporuladas, en forma de bacilo. Salmonella tiene importante relevancia a nivel de salud pública ya que es uno de los principales patógenos entéricos tanto en países desarrollados como en vías de desarrollo. En los casos de gastroenteritis notificados en España, Salmonella se posiciona en segundo lugar, después de Campylobacter. En este trabajo se utilizó como organismo modelo de estudio S. enterica serovar Typhimurium (S. Typhimurium), que en humanos causa salmonelosis, gastroenteritis caracterizada por diarrea inflamatoria,
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8

Kassotaki, Elissavet. "Elimination of micropollutants in conventional and novel nitrogen removal processes. A comparative assessment of diverse microbial communities capabilities." Doctoral thesis, Universitat de Girona, 2018. http://hdl.handle.net/10803/664342.

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Pharmaceutically active compounds (PhACs) and endocrine disrupting compounds (EDCs) can pose a significant risk to the environment and human health, undermining prosperity. Current wastewater treatment plants (WWTPs) cannot efficiently act as barriers to their release and have been identified as main points of discharge and contamination. The present thesis aimed to investigate the fate of five PhACs (ibuprofen, sulfamethoxazole, metoprolol, carbamazepine and venlafaxine) and five EDCs (estrone, 17β-estradiol, estriol, 17α-ethinylestradiol and bisphenol A) in different systems simulating waste
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9

Lawlor, Kirsten. "Distribution of bacteria and bacterial plasmids in lake water sediments." Thesis, University of Liverpool, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240596.

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10

Chvalkovská, Eva. "Využití různých metod izolace DNA baktérií mléčného kvašení v molekulárně biologických metodách." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2019. http://www.nusl.cz/ntk/nusl-401889.

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This thesis focused on the probiotic bacteria, DNA isolated from these bacteria by three different methods and the effect of isolation on DNA identification using molecular biological methods. Probiotic bacteria are an important part of human intestinal tract. They have an important role in the function of the immune system due to adhesion to the mucosa of the intestinal flora. They create a inhostile environment for pathogens. Probiotic bacteria are commonly taken in the food like dairy products or food supplements. However, overuse of antibiotics is at risk of passing on the intrinsic resist
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Sebastião, Isis [UNESP]. "Toxicidade e interação de proteínas Cry1 de Bacillus thuringiensis em Helicoverpa armigera (Hübner) (Lepidóptera: Noctuidae)." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/123869.

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Made available in DSpace on 2015-06-17T19:34:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-02-26. Added 1 bitstream(s) on 2015-06-18T12:49:23Z : No. of bitstreams: 1 000829428_20170301.pdf: 100482 bytes, checksum: 894af24aad4ca7d75f9898581c07f398 (MD5) Bitstreams deleted on 2017-03-03T11:01:31Z: 000829428_20170301.pdf,. Added 1 bitstream(s) on 2017-03-03T11:02:40Z : No. of bitstreams: 1 000829428.pdf: 275587 bytes, checksum: 79098a3390015f4449a4b64413d932a8 (MD5)<br>Estudos que visam a interação das proteínas Cry de Bacillus thuringiensis, a fim de encontrar combinações adequada
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Sebastião, Isis. "Toxicidade e interação de proteínas Cry1 de Bacillus thuringiensis em Helicoverpa armigera (Hübner) (Lepidóptera: Noctuidae) /." Jaboticabal, 2015. http://hdl.handle.net/11449/123869.

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Orientador: Manoel Victor Franco Lemos<br>Coorientador: Ricardo Antonio Polanczyk<br>Banca: Janete Apparecida Desidério<br>Banca: Camila Chiaradia Davolos<br>Resumo: Estudos que visam a interação das proteínas Cry de Bacillus thuringiensis, a fim de encontrar combinações adequadas para o desenvolvimento de plantas Bt são ferramentais fundamentais no controle de lepidópteros-praga. A lagarta H. armigera causa danos severos nas culturas agrícolas e sua introdução no Brasil levou a busca de formas de controle eficientes e nesse contexto B. thuringiensis pode ser um bom agente de controle. Diante
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13

Kim, Min Jun. "Bacterial flows : mixing and pumping in microfluidic systems using flagellated bacteria /." View online version; access limited to Brown University users, 2005. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3174627.

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14

Wood, Ryan. "Bacteria in Blood: Optimized Recovery of Bacterial DNA for Rapid Identification." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8147.

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Blood stream infections are challenging infections to rapidly diagnose. The current clinical diagnostic methods for blood stream infections require culturing the blood sample prior to identifying the bacteria and any resistance the bacteria may contain. Removing the culturing step from the bacterial identification process of a blood stream infection provides a significant reduction in the processing time. However, eliminating the culturing step shifts the difficulty from processing time to concentration, since clinical concentration levels can be as low as 10 CFU/mL in blood. This dissertation
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15

Adebayo, Olajumoke O. "Evaluation of bacterial polymers as protective agents for sensitive probiotic bacteria." Thesis, University of Wolverhampton, 2018. http://hdl.handle.net/2436/621096.

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Probiotics are live microorganisms which when administered in adequate amounts confer one or more health benefits on the host. Different processing conditions, the acidic condition of the stomach and exposure to hydrolytic enzymes affect the viability and efficacy of probiotic organisms. This study investigated the protective effects of two biopolymers poly-gamma-glutamic acid (γ-PGA) and bacterial cellulose (BC) on probiotics during freeze drying and during exposure to simulated intestinal juices and bile salts. The antibacterial property of Bifidobacterium strains was also investigated again
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16

Habeeb, Fatema. "Bacteria-cytokines interactions : effect of normal bacterial flora of pathogenic bacteria on pro-inflammatory cytokines production in human blood." Thesis, University of Strathclyde, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501921.

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17

Bergström, Niklas. "Structural studies of bacterial carbohydrate antigens with focus on oral commensal bacteria /." Stockholm : Karolinska institutets bibl, 2002. http://diss.kib.ki.se/2002/91-7349-236-1.

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18

Ghalsasi, Vihang Vivek [Verfasser], and Victor [Akademischer Betreuer] Sourjik. "Engineering bacteria to disperse bacterial biofilms / Vihang Vivek Ghalsasi ; Betreuer: Victor Sourjik." Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180608275/34.

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Deveci, Haci. "Bacterial leaching of complex zinc/lead sulphides using mesophilic and thermophilic bacteria." Thesis, University of Exeter, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341175.

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Ghalsasi, Vihang Vivek Verfasser], and Victor [Akademischer Betreuer] [Sourjik. "Engineering bacteria to disperse bacterial biofilms / Vihang Vivek Ghalsasi ; Betreuer: Victor Sourjik." Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180608275/34.

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21

Reeves, Adam J. "Signaling and interaction of the Bacillus subtilis physical stress pathway regulators of sigma B : a dissertation /." San Antonio : UTHSC, 2007. http://proquest.umi.com/pqdweb?did=1390290691&sid=1&Fmt=2&clientId=70986&RQT=309&VName=PQD.

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Château, Maarten de. "Functional, structural and evolutionary studies on a family of bacterial surface proteins." Lund : Dept. of Cell and Molecular Biology, Lund University, 1996. http://catalog.hathitrust.org/api/volumes/oclc/38947242.html.

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23

Moragrega, i. Garcia Concepció. "Interacció Pseudomonas syringae pv. syringae-perera. Factors determinants i activitat de diversos fosfonats en el desenvolupament de la malaltia." Doctoral thesis, Universitat de Girona, 1997. http://hdl.handle.net/10803/96472.

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Blast of pear caused by Pseudomonas syringae pv. syringae is one of the bacterial disease that limit pear production throughout the world. Symptoms are characterized by blast of buds and blossoms wich causes significant loss of fruit production, and necrotic spots on leaves or fruits. Control of bacterial blast of pear with chemicals is difficult and is based on copper compounds and antibiontics. However, its use is limited by the low efficacy, phytotoxicity to the plant or emerging resistance of the pathogen. The activity of several phosphonates (fosetil-Al, potassium phosphonate, etephon and
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24

LIMA, Danúbia Ramos Moreira de. "Fixação biológica de nitrogênio e nutrição nitrogenada em cana planta inoculadas com bactérias diazotróficas." Universidade Federal Rural de Pernambuco, 2016. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/4825.

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Submitted by Mario BC (mario@bc.ufrpe.br) on 2016-06-20T13:23:56Z No. of bitstreams: 1 Danubia Ramos Moreira de Lima.pdf: 1715855 bytes, checksum: 1868fd8d6fa7cd8052c609ded713f57c (MD5)<br>Made available in DSpace on 2016-06-20T13:23:56Z (GMT). No. of bitstreams: 1 Danubia Ramos Moreira de Lima.pdf: 1715855 bytes, checksum: 1868fd8d6fa7cd8052c609ded713f57c (MD5) Previous issue date: 2016-02-29<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>The sugarcane (Saccharum spp.) Is a widespread culture in tropical and subtropical regions, with Brazil as the world's lead
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Omer, Zahra Saad. "Bacterial-plant associations with special focus on pink-pigmented facultative mehtylotrophic bacteria (PPFMs) /." Uppsala : Dept. of Plant Pathology and Biocontrol Unit, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/a456-ab.html.

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Staley, Zachery. "Direct and Indirect Effects of Agrochemicals on Bacterial Pathogens and Fecal Indicator Bacteria." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4584.

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The presence of agrochemical residues in both urban and agricultural water bodies has become ubiquitous, often producing deleterious effects in the impacted watershed including reductions in biodiversity, alterations in species interactions, and toxicity to non-target organisms. While these effects have been studied on metazoan consumers, the consequences of agrochemical contamination on microorganisms, such as bacteria, protozoa, and viruses, are poorly understood. Agrochemicals could act directly on microorganisms, including pathogens, by either facilitating their survival or decreasing th
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27

Sabeti, Azad Mahnaz. "Accumulation of a bactericidal antibiotic by tolerant bacteria and insights into bacterial persistence." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS585.

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Les aminoglycosides (AG) sont une famille d’antibiotiques qui ciblent le ribosome bactérien. À titre d’exemple il s’agit de la néomycine, la gentamicine et la streptomycine. Quand ces antibiotiques se fixent au ribosome, ils provoquent des erreurs de lectures ou inhibent la synthèse des protéines, ce qui conduit à la mort cellulaire. Même s’ils ont été découverts il y a plus d’un demi-siècle, de nombreux aspects de leur mode d’action restent inconnus. L’accumulation des AG dans les bactéries se passe en trois étapes. La première consiste en une interaction électrostatique avec la membrane. La
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Dixit, Sameer M. "Antagonistic activity of probiotic bacteria based on bacterial diversity in the porcine gut." Thesis, View thesis, 2004. http://handle.uws.edu.au:8081/1959.7/35614.

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Diversity analysis of Escherichia coli have routinely utilised isolates obtained by culture of faeces on MacConkey selective media, under the assumption that the diversity identified in faecal isolates are representative of similar diversity in E. coli in the gastrointestinal tract (GIT). This study has addressed this important issue by specifically isolating E. coli from different regions of the gut in pigs and subjecting them to enzymatic multilocus enzyme electrophoresis (MLEE) and molecular virulence factor (VF) analysis to ascertain whether E. coli populations inhabiting different regions
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Dixit, Sameer M. "Antagonistic activity of probiotic bacteria based on bacterial diversity in the porcine gut." View thesis, 2004. http://handle.uws.edu.au:8081/1959.7/35614.

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Thesis (Ph.D.)--University of Western Sydney, Hawkesbury, 2004.<br>A thesis presented to the University of Western Sydney, Hawkesbury, Centre for Advanced Food Research, in fulfilment of the requirements for the degree of Doctor of Philosophy. Includes bibliographies.
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Rodriguez, Luis A. (Luis Antonio). "Adenylate Energy Charge Determinations of Soil Bacteria Grown in Soil Extract Medium." Thesis, University of North Texas, 1988. https://digital.library.unt.edu/ark:/67531/metadc500662/.

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The adenylate energy charge values of twenty bacteria isolated from soil and cultured in a medium consisting of soil and distilled water were determined by the luciferin-luciferase bioluminescense method. The purpose of this study was to examine the growth and energy charge values of these organisms in soil extract medium, and to determine what effect the addition of glucose has on their energy charge values. Three of the organisms employed in this study showed energy charge values similar to those reported for bacteria grown in enriched media. The remainder of the isolates demonstrated low en
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Ilabaca, Díaz Carolina. "Identificación de microbiota bacteriana relacionada con procesos enológicos en Chile." Doctoral thesis, Universitat Rovira i Virgili, 2016. http://hdl.handle.net/10803/364776.

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Aquesta recerca centrada en els bacteris processos relacionats amb enològic, com ara bacteris d'àcid làctic (BL) i bacteris d'àcid acètic (BA). Treballa principalment amb tècniques de cultiu independent per a la identificació de bacteris en una fermentació malolàctica fermentació (MLF) i en un acetificacion tradicional. En el cas de la BL, va dissenyar una estratègia d'identificació mitjançant PCR-RFLP. Perfils característics pels 4 gèneres BL presents en un FML s'aconsegueix. L'aplicació de nitrogen és comú per aconseguir un bon desenvolupament del responsable de llevats fermentació alcohòlic
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El, Mouali Benomar Youssef. "CRP-cAMP mediated silencing of virulence expression in Salmonella enterica serovar Typhimurium." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/456373.

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The regulation of the expression of virulence genes in Salmonella enterica serovar Typhimurium is an intensively studied feature of Salmonella lifestyle. How Salmonella integrates environmental signals to activate virulence-related genes within the host has been explored. The genes encoded in Salmonella pathogenicity island I (SPI-1) required for the invasion of epithelial cells are well characterized, and many regulators involved in the activation of SPI-1 genes have been described. However, little is known about mechanism involved in the repression of SPI-1 under conditions were Salmonella d
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Brown, Jaque Maryury Andrea. "Bacteriófagos en el cuerpo humano." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/664653.

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Los bacteriófagos son componentes abundantes y omnipresentes en muchos ambientes naturales, y el cuerpo humano no es la excepción. Del mismo modo que pasa en la naturaleza, los fagos en el cuerpo humano pueden desempeñar un papel importante en el control y la evolución de las poblaciones bacterianas, promoviendo la selección de ciertos tipos de bacterias e influyendo notablemente en la evolución de los genomas bacterianos mediante transferencia genética horizontal. Además, teniendo en cuenta su gran abundancia, podría preveerse que las partículas fágicas incluso lleguen a afectar a las bacteri
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Carratalá, Tomás Jose Vicente. "Development and characterization of protein nanoformulations as alternative therapeutics to reduce antibiotic usage." Doctoral thesis, Universitat Autònoma de Barcelona, 2021. http://hdl.handle.net/10803/673321.

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L’aparició de farmacoresistència bacteriana als antibiòtics convencionals és una situació d’alarma mundial. Aquest escenari ha obligat a implementar mesures com la millora de les pràctiques d’higiene o l’administració controlada d’antibiòtics per reduir el seu ús en totes les àrees en les que s’utilitzen comunament, inclosa la medicina humana i animal i la indústria animal de producció d’aliments . Totes aquestes mesures estan destinades a disminuir l’aparició i propagació de la resistència als antibiòtics entre els bacteris, però quan es tracta de combatre als bacteris que ja presenten una o
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Gitti, Douglas de Castilho [UNESP]. "Coberturas vegetais, doses de nitrogênio e inoculação de sementes com Azospirillum brasilense em arroz de terras altas no sistema plantio direto." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/98725.

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Made available in DSpace on 2014-06-11T19:29:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-03-02Bitstream added on 2014-06-13T20:59:58Z : No. of bitstreams: 1 gitti_dc_me_ilha.pdf: 798804 bytes, checksum: 2aee2e0022c100a7e87a247b54224150 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>O arroz é uma importante fonte de energia e proteínas para a população mundial, principalmente na Ásia e Oceania. No Brasil, juntamente com o feijão, constitui a base da alimentação. Tecnologias sustentáveis que reduzam custos dos produtores e aumentem a produtividade do ar
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Vetter, Yves-Alain. "Bacterial foraging with cell-free enzymes /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/11033.

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Okuklu, Burcu Güneş Hatice. "Investigation of chromosomal and plasmid dna profiles of lactococcus lactics ssp. lactis/." [s.l.]: [s.n.], 2005. http://library.iyte.edu.tr/tezler/master/biyoloji/T000396.pdf.

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Thesis (Master)--İzmir Institute of Technology, İzmir, 2005<br>Keywords: Lactococcus lactis ssp. lactis, chromosome profiling, pulsed field gel electrophoresis, plasmid profiling, plasmid stability. Includes bibliographical references (leaves 58-63)
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Davidson, Seana Kelyn. "Biology of the bryostatins in the marine bryozoan Bugula neritina : symbiosis, cryptic speciation and chemical defense /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 1999. http://wwwlib.umi.com/cr/ucsd/fullcit?p3035405.

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Sadeghi, Abbas. "Development of a Semi-synthetic Medium Supporting Adherent Growth in Coagulase-Negative Staphylococci." PDXScholar, 1992. https://pdxscholar.library.pdx.edu/open_access_etds/13.

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A semi-synthetic medium for use in determining adherent growth with Staphylococcus epidermidis and Staphylococcus saprophyticus was developed. Production of an adherent biofilm was dependent upon the presence of hematin in the growth medium. Clinical strains of Staphylococcus epidermidis were tested for production of an adherent biofilm in trypticase soy broth, the semi-synthetic medium and the hyperalimentary nutrient solution used in the neonatal hospital unit. An adherent biofilm was obtained when Staphylococcus epidermidis was cultured m hematin supplemented hyperalimentary solution. Growt
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40

Walkden, Heidi. "Bacterial infection of the brain: how bacteria penetrate the CNS by invading peripheral nerves." Thesis, Griffith University, 2020. http://hdl.handle.net/10072/395110.

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Bacterial infections of the central nervous system (CNS), though uncommon, are associated with very high rates of morbidity and mortality. Recent research has also highlighted the correlation between pathogens and chronic diseases of the CNS, such as neurodegenerative disorders, particularly Alzheimer’s disease. Whilst some bacteria can cross the blood-brain/blood-cerebrospinal fluid barriers, to date, other pathways by which bacteria enter the CNS remain largely unknown. Identifying alternative paths by which pathogens can enter the CNS is thus important for developing novel strategies preven
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41

Longford, Sharon Rae Faculty of Science UNSW. "The ecology of epiphytic bacteria on the marine red alga Delisea pulchra." Awarded by:University of New South Wales, 2007. http://handle.unsw.edu.au/1959.4/36783.

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Bacteria are ubiquitous to marine living surfaces, taking on a broad spectrum of roles from mutualistic to pathogenic. Despite their universality, much remains unknown about their basic ecology and interactions with higher organisms. To address this gap, this thesis firstly examines the bacterial communities associated with three co-occurring marine eukaryote hosts from temperate Australia: the demosponge Cymbastela concentrica, the subtidal red macroalga Delisea pulchra and the intertidal green macroalga Ulva australis. Molecular characterisation of the bacterial communities was undertaken us
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42

Jones, Nicole Jean. "NITRIFYING BACTERIAL ABUNDANCE IN RELATION TO NITROGEN AND PHOSPHORUS COMPOUNDS IN WETLANDS." OpenSIUC, 2012. https://opensiuc.lib.siu.edu/theses/829.

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Floodplain lakes are wetlands which receive flood waters from nearby rivers or other sources. Water samples were taken from floodplain lakes near the Illinois River, the Mississippi River, and the Cache River in Southern Illinois. Fluorescence in situ hybridization (FISH), spectrophotometry, and gene probes were used to investigate the effect of nutrient and chemical concentrations on the abundance of nitrifying bacteria; specifically ammonia-oxidizing Nitrosococcus and Nitrosomonadales and nitrite-oxidizing Nitrospira and Nitrobacter. Nitrosococcus was the dominant ammonia-oxidizing bacteria
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43

Chung, Whasun Oh. "Macrolide resistance and its linkage to tetracycline resistance /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/9279.

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44

Genís, Pagès Sandra. "Use of lactic acid bacteria as a preventive strategy against metritis in dairy cows." Doctoral thesis, Universitat Autònoma de Barcelona, 2016. http://hdl.handle.net/10803/399509.

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Aproximadament el 40% de les vaques lleteres desenvolupen una malaltia uterina durant el post-part que acaba provocant infertilitat. Alguns estudis indiquen que la infecció uterina, causada principalment per Escherichia coli durant la primera setmana post-part, està associada amb la metritis, caracteritzada per la inflamació de l’úter on la vaca és incapaç d’eliminar els bacteris patògens. El tractament antibacterià tradicional que s’utilitza per contrarestar la metritis pot no ser efectiu en tots els casos, sobretot quan hi ha una inflamació prolongada. El primer estudi està enfocat en ava
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45

Brufau, Bonet Maria Teresa. "Efecte dels β-galactomannans sobre la funció intestinal de barrera en les infeccions per Salmonella". Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/400155.

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L’administració d’antibiòtics a dosis subterapèutiques va ser una estratègia extensament utilitzada a partir dels anys 50 en la producció animal per a la prevenció d’infeccions i com a promotors del creixement. Tanmateix, la creixent aparició de bacteris resistents als antibiòtics va comportar que l’any 2006, la Unió Europea (UE) prohibís l’ús dels antibiòtics com a promotors del creixement (AGP) en la nutrició animal (CE n. 1831/2003). Aquesta prohibició, però, va fer repuntar el nombre de casos d’infeccions en animals i toxiinfeccions alimentàries en humans que fins aleshores havien estat co
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Sebastián, Ávila José Luis. "Desarrollo de aptasensores para la detección de bacterias enteropatógenas." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/460682.

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El objetivo general de esta tesis doctoral fue el desarrollo de biosensores basados en aptámeros para la detección de bacterias enteropatógenas. Para ello se estudiaron diferentes estrategias de detección gracias a las propiedades únicas de los aptámeros, tales como su capacidad de adoptar diferentes estructuras conformacionales tras el enlace con la molécula diana, su estabilidad y la facilidad con que se pueden modificar químicamente, introduciendo marcajes o ciertos grupos funcionales. Las bacterias utilizadas en todas las estrategias de detección fueron: Salmonella typhimurium (diana del a
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Turon, Rodrigo Marta. "Macro- and micro -symbioses involving sponges: Ecological roles in the marine benthos." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/668685.

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The symbiotic lifestyle represents a fundamental contribution to the diversity of marine ecosystems. Sponges are ideal models to study symbiotic relationships from evolutionary and ecological points of view since they are the most ancient metazoans on Earth, are ubiquitous in the marine benthos, and establish complex symbiosis with both prokaryotes and animals, which in turn harbour their own bacterial communities. In this thesis, we aim to go deeper into the mechanisms by which sponges establish symbiotic associations with members of the three domains of life, combining taxonomical, ecologi
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48

Singh, Umadatt. "The adherence properties of Bacteroides gingivalis." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/31013.

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A Bacteroides gingivalis adhesin mediating attachment to red blood cells and buccal epithelial cells was isolated, cloned and characterized. The isolation procedure involved gentle stirring of the cells followed by ammonium sulphate precipitation, ion-exchange and gel chromatography. The native molecule had a Mr in excess of 10⁶ kDa and was made up of subunits with an Mr of 43 kDa. Antisera raised to the adhesin and its subunits reacted with antigens on the surface of B. gingivalis cells. No reaction with fimbriae was seen. The IgG fractions from these antisera inhibited the adherence of B. gi
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Nilsson, Annika. "Bacterial adaptation to novel selection pressures /." Stockholm, 2005. http://diss.kib.ki.se/2005/91-7140-192-X/.

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Paro, Mariane Lima de Castro [UNESP]. "Análise do perfil de susceptibilidade antimicrobiana de microrganismos isolados de processos infecciosos bucais." Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/91435.

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Made available in DSpace on 2014-06-11T19:25:20Z (GMT). No. of bitstreams: 0 Previous issue date: 2003Bitstream added on 2014-06-13T20:13:38Z : No. of bitstreams: 1 paro_mlc_me_araca.pdf: 3376248 bytes, checksum: 3cb7c10029858de2655c594466804a68 (MD5)<br>As doenças infecciosas representam uma das principais causas de perda precoce dos dentes, podendo levar a seqüelas graves. Os microrganismos normalmente envolvidos nessas patologias quase sempre pertencem a microbiota autóctone da cavidade bucal e, quase invariavelmente, são de baixa virulência. Assim, o objetivo desse estudo foi avaliar a s
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