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Dissertations / Theses on the topic 'Pathogenic agent'

Author: Grafiati

Published: 7 September 2021

Last updated: 29 July 2025

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1

Amaral, Andreia Vanessa Campos Pusich. "Micropropagation, phenotyping and genotyping of chestnut progenies obtained from controlled crosses." Master's thesis, ISA, 2020. http://hdl.handle.net/10400.5/21510.

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Mestrado em Biologia dos Recursos Vegetais / Instituto Superior de Agronomia / Faculdade de Ciências. Universidade de Lisboa<br>Phytophthora cinnamomi is an oomycete that infects the roots and can cause the death of trees belonging to the Fagaceae family, such as genus Castanea. Ink disease is currently considered the major threat to chestnut trees in Europe, causing a high decrease in nut production, which is the highest income of mountain regions of Trás-os-Montes. Thus, genetic improvement for resistance aiming to developing new chestnut varieties less susceptible to this pathogen is very i

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2

Kepekci, Aysun Remziye. "Antifungal Spectrum Determination Of The K5 Type Yeast Killer Protein On Fungi Causing Spoilage In Citrus Fruits." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/12607858/index.pdf.

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Some yeast strains under certain conditions secrete polypeptide toxins which are inhibitory to sensitive fungal cells into the medium. These yeast strains are termed as killer yeasts and their toxins are designated as killer proteins or killer toxins. Killer proteins are classified into 11 typical types (K1-K11). These toxins have different killing mechanisms on sensitive cells. Some of them hydrolyze major cell wall component, beta-1,3- glucans. As mammalian cells lack cell walls research and development of novel highly selective antifungals are mostly focused on the agents which target the c

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3

Timme, Sandra [Verfasser], Marc Thilo Günter [Gutachter] Figge, Oliver [Gutachter] Kurzai, and Lars [Gutachter] Kaderali. "Agent-based modelling of the spatio-temporal interaction between immune cells and human-pathogenic fungi / Sandra Timme ; Gutachter: Marc Thilo Günter Figge, Oliver Kurzai, Lars Kaderali." Jena : Friedrich-Schiller-Universität Jena, 2018. http://d-nb.info/120588551X/34.

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4

Hilário, Sandra Cristina Carvalho. "Botryosphaericeae and Diaporthaceae species associated with blueberry plants in Portugal." Master's thesis, Universidade de Aveiro, 2017. http://hdl.handle.net/10773/21454.

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Mestrado em Microbiologia<br>The blueberry (Vaccinium corymbosum) is a non-native and increasingly cultivated plant in Portugal and represents an important part of the economy of some regions. The rapid growing of blueberry production has been accompanied by an increase of diseases caused by plant pathogens, mainly fungi. However, there is an overall lack of studies concerning blueberry fungal pathogens occurring in Portugal. This study aimed to contribute to fill this gap by focusing on Diaporthaceae and Botryosphaeriaceae species, which are known pathogens affecting cultivated areas o

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5

Jenczmionka, Nicole Joan. "The role of mitogen-activated protein kinases for developmental and pathogenic processes of Fusarium graminearum, the causal agent of the head blight disease of small grain cereals." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971440352.

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6

Kholikov, Khomidkhodzha. "Enhanced Singlet Oxygen Generation and Antimicrobial Activity of Methylene Blue Coupled with Graphene Quantum Dots as an Effective Photodynamic Therapy Agent." TopSCHOLAR®, 2018. https://digitalcommons.wku.edu/theses/3059.

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Growing resistance of bacteria towards antibiotics resulted in extensive research effort for development and application of new materials and techniques. Due to their unique properties, graphene quantum dots (GQDs) have attracted much attention and are a promising material with potential applications in many fields. One use of GQDs is as a photodynamic therapy agent that generates singlet oxygen. In this work, GQDs synthesized by focusing nanosecond laser pulses into a mixture of benzene and nickel(II) oxide were combined with methylene blue (MB) to eradicate Gram-negative Escherichia coli and

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7

Tureli, Akif Emre. "Antimicrobial Spectrum Determination Of The K5 Type Yeast Killer Protein And Its Kinetics Of Cell Killing." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606847/index.pdf.

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Some yeast strains under certain conditions secrete into the medium polypeptide toxins which are inhibitory to sensitive cells. These yeast strains are termed as killer yeasts and their toxins are designated as killer proteins or killer toxins. Killer proteins are classified into 11 typical types (K1-K11). These toxins have different killing mechanisms on sensitive cells. Some of them hydrolyze major cell wall component &amp<br>#946<br>-1,3- glucans. As mammalian cells lack cell walls research and development of novel highly selective antifungals are mostly focused on the agents which target t

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8

Yener, Burcu. "Determination Of Antimicrobial Spectrum Of K9 Type Yeast Killer Toxin And Its Cell Killing Activity." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607350/index.pdf.

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Some yeast strains secrete extracellular polypeptide toxins known to have potential growth inhibitory activity on other sensitive yeast genera but are immune to their own toxins. These yeast strains are termed as killer yeasts and their toxins are designated as killer proteins or killer toxins. Killer phenotypes are classified into 11 typical types (K1-K11). The toxic actions of yeast killer proteins on sensitive cells show differences and one of the most important toxic actions involves the selective functional damage by hydrolyzing major cell wall components. Because mammalian cells lack a c

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9

Koyyappurath, Sayuj. "Étude histo-pathologique et moléculaire de la résistance des vanilliers (Vanilla spp., Orchidaceae) à Fusarium oxysporum f.sp. radicis-vanillae, agent de la pourriture des racines et des tiges." Thesis, La Réunion, 2015. http://www.theses.fr/2015LARE0008/document.

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La production de vanille (Vanilla planifolia, Orchidaceae) est limitée par la pourriture des racines et des tiges (PRT) provoquée par des champignons telluriques du genre Fusarium contre lesquels la lutte chimique ou prophylactique est inefficace. Ce travail décrit finement l'interaction entre les vanilliers et les Fusarium dans le but de développer la lutte génétique. L'analyse moléculaire (gène EF1α et IGS) et la détermination du pouvoir pathogène de 365 souches de Fusarium isolées de vanilliers à La Réunion et à Madagascar ont démontré que les souches pathogènes sur vanillier appartiennent

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10

Bridel, Sébastien. "Développement d’outils bio-informatiques décisionnels en médecine vétérinaire : application au modèle Tenacibaculum, agent pathogène de poissons marins Comparative Genomicsof Tenacibaculum dicentrarchi and “Tenacibaculum finnmarkense”Highlights Intricate Evolution of Fish-Pathogenic Species Genetic diversity and population structure of Tenacibaculum maritimum, a serious bacterial pathogen of marine fish: from genome comparisons to high throughput MALDI-TOF typing." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASV012.

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Le genre Tenacibaculum (famille des Flavobacteriaceae, phylum Bacteroidetes), proposé en 2001 par Suzuki et al., comprend aujourd’hui 28 espèce valides. Ces bactéries sont exclusivement retrouvées dans les milieux marins, libres ou associées à des organismes tels que les poissons, les macroalgues et les invertébrés. Huit espèces sont pathogènes pour les poissons et essentiellement isolées dans des élevages. Ces bactéries sont à l’origine de maladies aux symptômes similaires collectivement désignées sous le nom de ténacibaculoses. L’identification basée sur des caractères phénotypiques n’est pa

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11

Joseph-Horne, Tim. "Mechanisms of antifungal resistance in pathogenic fungi." Thesis, University of Sheffield, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387760.

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12

Kramer, Ryan M. "Molecular Signature Characterization of Select Agent Pathogen Progression." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1394725717.

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13

Stock, Nicholas Simon. "The total synthesis of the antifungal agent Pramanicin." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314372.

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14

Ellepola, Arjuna Nishantha Bandara. "The post-antifungal effect (PAFE) and its impact on the pathogenic attributes of Candida albicans." Thesis, Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21253274.

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15

Adducci, Benjamin Augustus. "Detection of a Surrogate Biological Threat Agent (Bacillus globigii) with a Portable Surface Plasmon Resonance Biosensor." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/73535.

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New methods and technology are needed to detect biological agents that threaten the health of humans and domestic animals. The bacterium Bacillus anthracis, causal agent of anthrax, has been used as a biological warfare agent. Here, we extend the work of Chinowksy et al. (2007) to the detection of a surrogate of B. anthracis, B. globigii (also known as B. atrophaeus, B. subtilis var. niger, B. subtilis var. subtilis) in a mixed sample containing two different species of Bacillus using a portable surface plasmon resonance (SPR) biosensor (SPIRIT 4.0, Seattle Sensor Systems). Two methods (direct

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16

Tsukamoto, Hiroshi. "Evaluation of Echinochloa Pathogens as Biological Agents for Weed Control." Kyoto University, 2000. http://hdl.handle.net/2433/181076.

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17

Gunnarsson, Iva. "SLE : pathogenetic mechanisms in nephritis and sulphasalazine-induced lupus reactions /." Stockholm, 1999. http://diss.kib.ki.se/1999/91-628-3654-4/.

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18

Muriel, Galet Virginia. "Novel antimicrobial films based on ethylene-vinyl alcohol copolymers for food packaging application." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/48522.

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This PhD dissertation thesis has been focus on the development and characterization of antimicrobial packaging films based on the incorporation in the polymer matrix or on the attachment to the film surface of naturally occurring antimicrobial compounds with the purpose of inhibiting the proliferation of microorganisms and extend the microbiological shelf life of packaged food products. The studied active films are based on the use of ethylene vinyl copolymers (EVOH) containing 29% (EVOH29) or 44% (EVOH44) molar percentage of ethylene as polymeric vehicle for the incorporation of severa

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Tavares, Ana Filipa Nogueira. "Novel insights into the action of antimicrobial agents against human pathogens." Doctoral thesis, Universidade Nova de Lisboa. Instituto de Tecnologia Química e Biológica, 2013. http://hdl.handle.net/10362/11965.

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Dissertation presented to obtain the Ph.D degree in Biochemistry<br>Nowadays, the growing increase of antibiotic resistance represents a global public health concern. Hence, it is crucial to understand the mode of action of antimicrobial agents and to develop new strategies to control bacterial infections. The work presented in this thesis contributes with new insights into the mechanisms that underpin the action of antimicrobial agents against pathogenic bacteria through: (i) the study of a putative nitroreductase of Staphylococcus aureus and its involvement in nitrofurans activation; (

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20

Ameh, Ekwu Mark. "The use of bacteriophages as natural biocontrol agents against bacterial pathogens." Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/11331.

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Bacteriophages are viruses that specifically infect bacteria. The bactericidal nature of lytic bacteriophages has been exploited by scientists for decades with the hope to utilise them in the fight against bacterial infections and antibiotic resistant bacteria in medical settings. More recently, the potential applications of bacteriophages for biocontrol in the agrifood and environmental sectors have been investigated in an attempt to develop ‘natural’ antimicrobial products. Bacteriophages have a couple of decisive advantages over conventional methods of controlling pathogenic bacteria, such

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Mendi, Ebrahim M. "Biological control of Chenopodium album by Ascichyta caulina." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2001. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=59743.

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22

Stewart, Thomas E. "The Grass Seed Pathogen Pyrenophora semeniperda as a Biocontrol Agent for Annual Brome Grasses." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/2267.

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Bromus tectorum and other annual brome grasses have invaded many ecosystems of the western United States, and because of an annual-grass influenced alteration of the natural fire cycle on arid western range lands near monocultures are created and conditions in which the native vegetation cannot compete are established. Each year thousands of hectares become near monocultures of annual brome grasses. Pyrenophora semeniperda, a generalist seed pathogen of annual grasses, shows major potential as a possible mycoherbicide that could help in reducing the monocultures created by annual grasses. The

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23

Boots, Michael Robert John. "Ecological and evolutionary consequences of a host-pathogen interaction." Thesis, University of Liverpool, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333390.

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24

Bergman, Peter. "Antimicrobial peptides and pathogenic Neisseria : experimental studies in mouse, man and rat /." Stockholm, 2005. http://diss.kib.ki.se/2005/91-7140-428-7/.

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25

JAUNET, THIERRY. "Caracterisation, pathogenie et epidemiologie de pseudomonas fuscovaginae, agent de la pourriture brune des gaines du riz (oryza sativa)." Paris 11, 1995. http://www.theses.fr/1995PA112017.

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La pourriture brune des gaines du riz causee par pseudomonas fuscovaginae est la principale contrainte pathologique de la riziculture des zones tropicales d'altitude en afrique, en asie et en amerique du sud. L'etude de 72 echantillons de pourritures de gaine collectees a madagascar et au nepal en 1991 et 1992 a permis d'isoler 162 isolats bacteriens dont 65% induisent une pourriture de gaine apres inoculation sur riz au stade plantule. La caracterisation physiologique basee sur 8 tests biochimiques permet de regrouper les 106 isolats pathogenes sur riz au stade plantule en 11 groupes biochimi

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26

Fleeman, Renee. "Discovering Antibacterial and Anti-Resistance Agents Targeting Multi-Drug Resistant ESKAPE Pathogens." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/6839.

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Antibiotic resistance has been a developing problem for mankind in recent decades and multi-drug resistant bacteria are now encountered that are resistant to all treatment options available. In 2014, the World Health Organization announced that this problem is driving us towards a “post-antibiotic era” that will change the face of modern medicine as we know it. If lack of novel antibiotic development and FDA approval continues, by the year 2050, 10 million people will die each year to an antimicrobial resistant bacterial infection. With lack of pharmaceutical industry involvement in developing

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27

Lim, Kyungwha. "Reduction of spoilage and pathogenic bacteria on beef products by direct and indirect applications of antimicrobial agents /." free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p3100061.

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28

Sussel, Angelo Aparecido Barbosa. "Caracterização de isolados de Colletotrichum lagenarium, agente causal da antracnose das Cucurbitáceas." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/11/11135/tde-19052005-171537/.

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A antracnose, doença causada por fungos do gênero Colletotrichum, é uma das doenças mais importantes em muitas plantas cultivadas. Nas cucurbitáceas, como pepino, chuchu, melão e melancia, a antracnose é muito freqüente e causa prejuízos bastante elevados. O agente causal é o Colletotrichum lagenarium, que apresenta como sinonímias C. orbiculare e C. gloeosporioides f. sp. cucurbitae. O presente trabalho visa caracterizar cultural, morfológica e patogenicamente, e identificar molecularmente, os isolados de C. lagenarium, obtidos de plantas da família Cucurbitaceae. Os isolados foram obtido

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29

Dunn, Michael G. "Molecular characterisation of a Bacillus thuringiensis genetic locus." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360025.

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30

Oh, Herin. "Quinolone resistance in Bacteroides fragilis and Pseudomonas aeruginosa, two opportunistic pathogens /." Stockholm, 2003. http://diss.kib.ki.se/2003/91-7349-498-4.

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Gonciarz, Ryan Lennox. "Broadening the spectrum of antibacterial agents to tackle multidrug-resistant Gram-negative pathogens." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/22308/.

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Antimicrobial resistance is one of the greatest threats to human health in the 21st century: particularly resistance amongst Gram-negative bacteria. The work presented herein aims to identify new agents that target drug-resistant Gram-negative pathogens such as E. coli, through the rational modification of the oxazolidinone class of antibiotics. This class, exemplified by linezolid, is well validated for treating Gram-positive derived infections, but lacks clinically-useful activity against Gram-negative bacteria. An integrated approach encompassing structure-based drug design, organic synthes

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Filgueira, Pimentel Mirian. "EVALUATION AND FUNCTIONAL CHARACTERIZATION OF BIOCONTROL AGENTS TARGETING SELECT SOILBORNE PATHOGENS OF SOYBEAN." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/dissertations/1886.

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Soybean crops are vulnerable to a wide range of pathogens that reduce yield and cause extensive losses worldwide. In the United States, the soilborne pathogens Pythium spp., causing soybean damping-off, and Fusarium virguliforme, causing sudden death syndrome (SDS) of soybean, have been among the top diseases that most reduced soybean yields. This study demonstrated that biological control using native fungal antagonists could be a powerful tool to integrate with current management strategies for more efficient control of Pythium damping-off and SDS in soybean. Trichoderma spp. and Clonostach

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33

AMBIKA, KM. "ROLE OF LACTOSMART AS A NOVEL THERAPEUTIC AGENT IN ANTIMICROBIAL DEFENSE." Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2021. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18433.

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The emergence of multi – drug resistance (MDR ) in microorganisms against antibiotics has become a global problem [1,2,3]. Various conventional drugs with promised efficacy and specificity are unable to withstand the threat of antibiotic drug resistance [4,5,6]. The rising crisis of MDR bacteria has led to the channelization of relevant research in the direction of antimicrobial molecules from natural sources as potential novel antibiotics. The spectrum of innate immune proteins and their potent fragments herald a promising approach to fight the problem of drug resistance. Among the na

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Douglas, Lisa Iris. "Physiology and ecology of Idriella bolleyi, a biological control agent of cereal root and stem base pathogens." Thesis, University of Edinburgh, 1996. http://hdl.handle.net/1842/13702.

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<I>Idriella bolleyi</I> strains, T560, J10 and AB1, differed considerably in their tolerance to water-stress - this was apparent in both osmotic and matric potentials and in all aspects of their growth cycle. The level of tolerance for one strain, T560, was comparable to the take-all pathogen <I>Gaeumannomyces graminis</I> var. <I>tritici</I>, which is associated with low water-stress tolerance, and another strain, AB1, was comparable to the foot-rot pathogen <I>Fusarium culmorum</I>, known to be highly tolerant of drought conditions. Variation in response to osmotic potential was also observe

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35

Barny, Marie-Anne. "Etude genetique et moleculaire du determinisme du pouvoir pathogene d'erwinia amylovora : agent du feu bacterien des pomoidees." Paris 7, 1990. http://www.theses.fr/1990PA077009.

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Erwinia amylovora est la bacterie responsable du feu bacterien des pomoidees. Nous avons cherche a determiner si pea28, plasmide omnipresent chez e. Amylovora intervenait dans la virulence. L'obtention d'une souche ne contenant plus ce plasmide nous a permis d'etablir que pea28, n'etait pas indispensable au pouvoir pathogene mais intervenait neanmoins au niveau de l'agressivite de l'espece. Dans le but d'identifier des genes codant pour des fonctions cles du processus infectieux, nous avons mutagenise la souche sauvage cfbp 1430 d'e. Amylovora par l'intermediaire d'un derive du phage mu: mudii

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36

Nkosi, Themba Johan. "Antimicrobial activities of three medicinal plants against selected diarrheagenic pathogens." Thesis, Nelson Mandela Metropolitan University, 2013. http://hdl.handle.net/10948/d1020759.

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Diarrhea is a global concern that the United Nations Children’s Fund (UNICEF) and the World Health Organization (WHO), have confirmed to be the second major cause of death in children under the age of five. Major bacterial pathogens that cause diarrhea include Escherichia coli, Salmonella species, Shigella species and Staphylococcus aureus. Antibiotic therapy is recommended depending on the severity and presentation of the disease; however, the appearance of antibiotic-resistant bacteria is an emerging global threat to the ability to treat these bacterial infections. This situation could be ov

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37

Mechmechani, Samah. "Hurdle technology using microencapsulated proteolytic enzymes and microencapsulated carvacrol to fight pathogenic bacterial biofilms." Electronic Thesis or Diss., Université de Lille (2022-....), 2022. http://www.theses.fr/2022ULILR023.

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L'environnement opératoire dans les domaines alimentaire et médical permet aux bactéries de se fixer et de se développer sur les surfaces, ce qui entraîne la formation de biofilms bactériens pathogènes et résistants. Ces structures pathogènes sont responsables de nombreuses maladies d'origine alimentaire et d'infections associées aux soins. Par conséquent, pour lutter contre ce fléau de santé publique, plusieurs stratégies ont récemment été proposées, notamment l'élimination chimique et mécanique. Ce travail présente les différents facteurs qui influencent l'adhésion bactérienne et la formatio

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Kimmelfield, Rebecca B. "Establishing the use of Pseudomonas spp. as biocontrol agents of fungal and nematode pathogens." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu159367589981123.

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Kleyi, Phumelele Eldridge. "The development of functionalized electrospun nanofibers for the control of pathogenic microorganisms in water." Thesis, Rhodes University, 2014. http://hdl.handle.net/10962/d1013134.

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The thesis presents the development of functionalized electrospun nylon 6 nanofibers for the eradication of pathogenic microorganisms in drinking water. Imidazole derivatives were synthesized as the antimicrobial agents and were characterized by means of NMR spectroscopy, IR spectroscopy, elemental analysis and X-ray crystallography. The first set of compounds (2-substituted N-alkylimidazoles) consisted of imidazole derivatives substituted with different alkyl groups (methyl, ethyl, propyl, butyl, heptyl, octyl, decyl and benzyl) at the 1-position and various functional groups [carboxaldehyde

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40

Liu, Yang Li Men`gshi. "Study of antimicrobial activity and mechanism of zinc oxide nanoparticles against foodborne pathogens." Diss., Columbia, Mo. : University of Missouri-Columbia, 2009. http://hdl.handle.net/10355/6718.

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The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on March 23, 2010). Thesis advisor: Dr. Mengshi Lin. Includes bibliographical references.

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Hogan, Tiffany Rose School of Medical Science UNSW. "Molecular changes in the topoisomerase genes, gyrA and parC, and their contribution to fluoroquinolone resistance in the pathogenic Neisseria." Awarded by:University of New South Wales. School of Medical Science, 2006. http://handle.unsw.edu.au/1959.4/27298.

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This thesis examined molecular changes in the quinolone-resistance determining regions (QRDRs) of the topoisomerase genes, gyrA and parC of Neisseria gonorrhoeae and Neisseria meningitidis and their contribution to fluoroquinolone resistance (FQR). Initially models of FQR emergence were developed from analysis of resistant mutants generated in vitro. The effects of the nature and order of sequential changes in GyrA and ParC on FQR were explored by correlating QRDR changes with ciprofloxacin minimum inhibitory concentration (MIC) determinations. The in vitro models were validated by comparisons

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42

Boardman, Cynthia. "Host-Pathogen Interactions between Eastern Oysters (Crassostrea virginica) and the Bacterial Agent of Juvenile Oyster Disease (Roseovarius crassostreae)." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/BoardmanC2005.pdf.

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43

Okleberry, Kevin M. "Metabolism of Selected Antiviral Agents in Cells Infected with Drug-Resistant and Wild-Type Strains of Murine Cytomegalovirus." DigitalCommons@USU, 1995. https://digitalcommons.usu.edu/etd/4657.

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Resistance of human viral pathogens to various antiviral drugs is a serious medical problem. Two modes of drug resistance in cytomegalovirus infections have been observed, the first being altered (decreased) drug metabolism by the infected cells, and the second reduced sensitivity of the viral deoxyribonucleic acid polymerase enzyme to the active form of the drug. Mice infected with the murine cytomegalovirus have been used extensively as an animal model for the human cytomegalovirus, and drug-resistant strains in this model have been identified. To better understand the mode of drug resistanc

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Bennett, Amanda Judith. "Integrated use of soil sterilisation and the application of biocontrol agents to control plant pathogens." Thesis, University of Newcastle Upon Tyne, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403651.

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45

Makambila, Casimir. "Etude de l'anthracnose du manioc (manihot esculenta crantz) et son agent pathogene colletotrichum gloeosporioides penz f. Sp. Manihotis henn." Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF2E385.

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L'agressivite des souches de colletotrichum manihotis varie d'une souche a une autre et les cultivars de manioc inocules sont plus ou moins sensibles au champignon. La temperature et la lumiere exercent une action sur l'infection des tiges. In vitro la lumiere stimule ou inhibe, selon les temperatures la croissance en longeur des hyphes et la conidiogenese. Les radiations bleues, vertes et jaunes inhibent la croissance a 32 non=c. , les radiations rouges stimulent la croissance a des temperatures comprises entre 20 et 28 non=c. La conidiogenese est inhibee a 20 non=c. Et stimulee a partir de 2

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Ray, Pushpanjali. "Search for novel actinomycetes from soil as potential biocontrol agent against fungal root pathogens of phaseolus vulgaris (L.) vigna radiata(L.)." Thesis, University of North Bengal, 2017. http://ir.nbu.ac.in/hdl.handle.net/123456789/2575.

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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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FIERRO, MARCO. "Characterization of Italian chickpea landraces and investigation on interaction between plant, pathogen and biocontrol agents." Doctoral thesis, Università degli studi del Molise, 2017. http://hdl.handle.net/11695/73182.

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Il cece è la terza leguminosa da granella coltivata nel mondo; per le sue caratteristiche nutrizionali rappresenta una fonte ottimale di nutrienti, vitamine e minerali nella dieta umana così come nella nutrizione animale. L'Italia è il secondo produttore di ceci nella Comunità europea (UE), ma la produzione italiana, destinata a consumo umano, si basa principalmente su ecotipi locali prodotti in piccole aziende agricole. Dal 1985, a causa di un improvviso calo della produzione nazionale di ceci, la maggior parte del mercato italiano è sostenuta dalle importazioni. Questa tendenza, fortunatamen

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Troskie, Anscha Mari. "Tyrocidines, cyclic decapeptides produced by soil bacilli, as potent inhibitors of fungal pathogens." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86162.

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Thesis (PhD)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: The global rise in microbial resistance, ranging from the agricultural industry to the medical sector, has created the urgent need for novel or supplementary antibiotics. Antimicrobial peptides or “nature’s antibiotics” may be the answer to this major problem. In this study a group of antimicrobial peptides, cyclic decapeptides named tyrocidines, produced by the soil bacterium Bacillus aneurinolyticus, was investigated for their antifungal activity, possible mode of antifungal action and potential applications. The study i

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Bonaldi, M. "STREPTOMYCETES AS BIOLOGICAL CONTROL AGENTS AND PLANT GROWTH-PROMOTING BACTERIA." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/247475.

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Developing no-chemical strategies for the control of soil borne pathogens is one of the major issues for the cultivation of leafy vegetables. The application of Biological Control Agents (BCAs) represents a valuable approach and nowadays some biocontrol products are available on the market for greenhouse and field applications. However, these products often show lack of consistency and variable results mainly due to the poor knowledge about their biology and modes of applications and how the agroecosystem components modulate their efficacy. Streptomycetes are soil inhabitants and have an impo

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