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Dissertations / Theses on the topic 'Parasite'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Boissier, Jérôme. "Sexe et schistosome : écologie des interactions hôte-parasite et parasite-parasite." Perpignan, 2001. http://www.theses.fr/2001PERP0478.

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Le cycle biologique du genre Schistosoma est analysé à travers les interactions hôte-parasite en fonction du sexe de l'infestation et à travers les interactions parasite-parasite sexe-dépendantes. L'analyse des interactions hôte-parasite en fonction du sexe de l'infestation révèle que les mâles schistosomes induisent une plus grande pathogénie que les femelles schistosomes aussi bien chez l'hôte mollusque que chez l'hôte vertébré. Chez l'hôte mollusque, les fonctions de nutrition, de relation et de reproduction sont plus affectées par un parasite mâle que par un parasite femelle. Chez l'hôte v

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2

Rakowitz, Michael. "ParaSITE." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/69401.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Architecture, 1998.<br>Includes bibliographical references (p. 71).<br>paraSITE proposes the appropriation of exterior ventilation systems on existing architecture to inflate pneumatic shelters that are designed for homeless people. This project involves the production of a series of inflatable prototypes, the distribution of these devices to a group of homeless people, and the subsequent use of these shelters in relation to a building.<br>by Michael Jonathan Rakowitz.<br>S.M.

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3

Schneider, Maria Victoria. "Modes de reproduction chez le parasitoi͏̈de solitaire Venturia canesces." Lyon 1, 2003. http://www.theses.fr/2003LYO10071.

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Venturia canescens, un parasitoi͏̈de ichneumonidé de chenilles de piralidés, a deux modes de reproduction : arrhénotoque, (mâles haploi͏̈des et femelles diploi͏̈des)) et thélytoque (des femelles vierges engendrent des filles diploi͏̈des). Cette thélytoquie n'est pas l'effet de bactéries symbiotiques. Dans le Sud de la France, les deux modes de reproduction coexistent en sympatrie. La thèse traite des questions soulevées par cette coexistence. Une étude de la distribution géographique et une analyse moléculaire des populations, ont montré l'existence d'un clone thélytoque très répandu. Cependan

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4

Isomursu, M. (Marja). "Host–parasite interactions of boreal forest grouse and their intestinal helminth parasites." Doctoral thesis, Oulun yliopisto, 2014. http://urn.fi/urn:isbn:9789526203645.

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Abstract Parasites are an inseparable part of the life of wild birds. They may cause morbidity, mortality or reduction in fecundity. Parasite distribution in hosts is typically not uniform and many host factors (e.g. age) may affect the pattern of distribution. Under certain conditions, parasites even have the potential to regulate the host population. The grouse species of Finnish forests — the capercaillie Tetrao urogallus , the black grouse Lyrurus tetrix and the hazel grouse Tetrastes bonasia — harbour several species of intestinal helminth parasites. The populations have fluctuated in cyc

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5

St, Vincent Chad Michael. "'Parasite single' women of Japan : 'parasites' or search for a new identity? /." Title page, contents and introduction only, 2002. http://web4.library.adelaide.edu.au/theses/09AR/09ars7749.pdf.

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6

Goodhead, Ian Barry. "Genomic approaches to understanding host resistance and parasite virulence in Trypanosoma parasites." Thesis, University of Liverpool, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.570185.

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Roughly one-third of cattle in sub-Saharan Africa are at risk of contracting "Nagana" - a disease caused by Trypanosoma parasites similar to those that cause human "Sleeping Sickness". Laboratory mice can also be infected by trypanosomes, and different mouse breeds show varying levels of susceptibility to infection, similar to what is seen between breeds of cattle. We have applied next-generation technologies to identify shared polymorphisms between susceptible mice, and annotated these for potential function alongside publicly available SNP data sets. By so doing, short lists of genes at the

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7

Ferté, Hubert. "Les nématodes parasites du tube digestif du chevreuil (Capreolus capreolus L. 1758) : à propos d'une enquête réalisée dans le nord-est de la France." Tours, 1987. http://www.theses.fr/1987TOUR3805.

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8

Mintsa, Nguema Rodrigue. "Interactions hôte-parasite dans le modèle Biomphalaria pfeifferi-Schistosoma mansoni du Dhofar (Oman) : génétique des populations de l’hôte, traits d’histoire de vie et conséquences sur la transmission du parasite." Perpignan, 2010. http://www.theses.fr/2010PERP0995.

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Cette thèse a été réalisée dans le contexte de la réémergence de la schistosomose à Schistosoma mansoni (plathelminthe trématode) dans le Dhofar en Oman. Le travail est centré sur les interactions hôte-parasite et sur leurs conséquences sur la transmission du schistosome. Une première partie est consacrée à l’étude spatio-temporelle de la structure génétique des populations de Biomphalaria pfeifferi (mollusque gastéropode d’eau douce). Elle a été réalisée à l’aide de neuf marqueurs microsatellites sur 18 populations de mollusques. Les populations de B. Pfeifferi étudiées sont caractérisées par

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9

Houngbédji, Tossimidé. "Rhamphicarpa fistulosa : infestation dans les bas-fonds rizicoles de la Région des Savanes (Togo) et étude des interactions hôte-parasite." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS455/document.

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Une des contraintes biotiques majeures de la riziculture de bas-fond au nord du Togo est l’adventice parasite Rhamphicarpa fistulosa (Hochst.) Benth. Afin d’évaluer les options stratégiques pour contrôler efficacement R. fistulosa, notre étude a été conduite avec comme principaux objectifs : 1) l’identification de la répartition de R. fistulosa et l’étude des facteurs qui favorisent son infestation, 2) l’étude de l’impact des niveaux d’infestation sur la flore adventice du riz, et 3) la caractérisation des interactions hôte-parasite et de leurs impacts sur le développement de l’hôte et les per

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10

Oliveira, Ana Carolina Santos. "Mecanismos parasitários de escape ao sistema imunológico." Master's thesis, [s.n.], 2011. http://hdl.handle.net/10284/2486.

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Trabalho apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Ciências Farmacêuticas.<br>A evasão ao sistema imunulógico, por parte dos parasitas, está actualmente omnipresente e envolve uma série de mecanismos moleculares, que reflectem a evolução, reprodução e crescimento parasitário. Existem uma série de formas e processos de escape parasitário permitindo com que estes garantam, simultaneamente, a sua sobrevivência e a do hospedeiro. A co-evolução convergente entre hospedeiro e parasita sustêm a base destes mecanismos que se baseiam na man

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11

Prior, Kimberley Faith. "The evolutionary ecology of circadian rhythms in malaria parasites." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/29562.

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Biological rhythms are thought to have evolved to enable organisms to organise their activities according to the Earth’s predictable cycles, but quantifying the fitness advantages of rhythms is challenging and data revealing their costs and benefits are scarce. More difficult still is explaining why parasites that exclusively live within the bodies of other organisms have biological rhythms. Rhythms exist in the development and traits of parasites, in host immune responses, and in disease susceptibility. This raises the possibility that timing matters for how hosts and parasites interact and,

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12

Vandame, Rémy. "Importance de l'hybridation de l'hôte dans la tolérance à un parasite : cas de l'acarien parasite Varroa jacobsoni chez les races d'abeille Apis mellifera européenne et africanisée, en climat tropical humide du Mexique." Lyon 1, 1996. http://www.theses.fr/1996LYO10306.

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13

Williams, Emily Rose-Margaret. "Parasites and the ecological undead: marine snails and their suite of trematodes." Thesis, The University of Sydney, 2012. https://hdl.handle.net/2123/28920.

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The invisible interactions between parasites and their hosts are important elements of the ecology and biology of host populations. Parasites can shape the morphology, distribution, physiology and behaviour of individual hosts - some commonly studied host-parasite interactions often involve gastropods and trematodes. Trematodes can have detrimental effects on their snail hosts, yet many such relationships are relatively unknown. One such relationship is that of the mud whelks, Velacumantus australis, many of which are infected by several species of parasitic trematode. Australian estuaries and

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14

Grenier, Simon. "Biologie et physiologie des relations hôtes-parasitoïdes chez 3 tachinaires (Diptera, Tachinidae) d'intérêt agronomique : développement en milieux artificiels : lutte biologique." Lyon 1, 1986. http://www.theses.fr/1986LYO10004.

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15

Campbell, Scott Edward. "Secreted proteins in Microsporidian parasites : a functional and evolutionary perspective on host-parasite interactions." Thesis, University of Exeter, 2013. http://hdl.handle.net/10871/14523.

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The Microsporidia form a phylum of obligate intracellular parasites known to cause disease in humans and a diverse range of economically important animal species. Once classified as ‘primitive’ eukaryotes, it is now recognised that the peculiarities of microsporidian genomics and cell biology are, in fact, the consequence of extreme reduction allowed by an intimate relationship with the host cell. Excluding survival as an extracellular spore, microsporidia are in direct contact with the host throughout their developmental lifecycle, from entry to egress. Host cell manipulations have been descr

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16

O'Brien, Chris. "Appreciating the Importance of Parasites: Analyzing and Understanding the Ecology of Parasite-Host Interactions." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/194212.

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There is a growing interest in the nature of parasite-host interactions, the role these relationships play in ecological communities, and how human activities alter these associations. Furthermore, because inference about these interactions is usually gained by methods of statistical hypothesis testing, additional importance should be placed on the analysis and interpretation of parasite-host interactions. In this dissertation I address these ideas in three separate but interrelated studies with the three following questions: 1) How do two parasites with complex life-cycles alter the behavi

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17

Morgan, Andrew. "Experimental host-parasite coevolution." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424864.

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18

Jones, R. S. "Parasite-induced warning colouration." Thesis, University of Liverpool, 2016. http://livrepository.liverpool.ac.uk/3006078/.

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Parasites are ubiquitous in nature and are capable of exerting strong selection pressures on their hosts to enhance (or potentially reduce) transmission. Parasite manipulation of hosts can therefore drive evolution of various traits and phenotypes in the host to the benefit of the parasite. These adaptations can serve a number of purposes, working to enhance survival and reproduction of the parasite within its host. This thesis aims to elucidate the roles of various defences induced by the nematode Heterorhabditis bacteriophora and its symbiotic bacterium Photorhabdus luminescens in its obliga

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19

Syed, Abeer. "Microsystems for parasite enrichment." Thesis, University of Glasgow, 2013. http://theses.gla.ac.uk/4353/.

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The aim of this project was to develop a lab-on-chip platform upon which activities in engineering and parasitology can be brought together to create new low cost diagnostic technologies for Human African Trypanosomiasis, a disease also known as sleeping sickness, for use in resource-poor environments like Sub-Saharan Africa. Filtration and separation of particles is essential for many biochemical and analytical assays. This work describes the development of novel techniques to enhance the separation/enrichment of parasites from whole blood. Techniques like chemotaxis, inertial microfluidics a

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20

Bell, Andrew Stuart. "Studies on the biosystematics and biology of strigeids (Digenea) parasitic in freshwater fish." Thesis, University of Stirling, 1995. http://hdl.handle.net/1893/3383.

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This study is concerned with two strigeid genera which utilise fish as their second intermediate host and piscivorous birds as a definitive host, i.e. Apatemon (Apatemon) Sudarikov, 1959 and Ichthyocotylurus Odening, 1969. Although the lifecycle has been ascertained for most Ichthyocotylurus spp., confusion and disagreement still exist as to the constituent species, while all of the life-stages have been described for only a single member of the subgenus Apatemon (Apatemon). In order to clarify species membership to these taxa and indeed the taxonomic position of the subgenus Apatemon (Apatemo

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21

Serne-Delaves, Micheline. ""Blastocystis hominis" Brumpt, 1912 et blastocystose humaine : un parasite méconnu, une parasitose discutée." Paris 5, 1993. http://www.theses.fr/1993PA05P017.

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22

Pereira, Felipe Bisaggio. "Estrutura da comunidade de helmintos associados ao lagarto Tropidurus torquatus (Squamata: Tropiduridae) em uma área de afloramento rochoso no distrito de Toledos, Juiz de Fora, MG." Universidade Federal de Juiz de Fora (UFJF), 2010. https://repositorio.ufjf.br/jspui/handle/ufjf/3017.

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23

Besnard-Cochennec, Nathalie. "Bonamia ostreae, parasite de l'huître plate, Ostrea edulis : sa position taxonomique parmi les parasites du groupe "microcell" : analyses des interactions hôte-parasite chez plusieurs populations d'huître plates." La Rochelle, 2001. http://www.theses.fr/2001LAROS073.

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La Bonamiose, maladie due au protozaire Bonamia ostreae a été détectée en 1979 pour la première fois en Bretagne au cours d'épisodes de mortalité. Depuis, cette maladie s'est propagée à tous les centres ostréicoles français, puis européens. Une autre espèce, B. Sp. A été décrite en Nouvelle Zélande et en Australie. En outre, deux autres parasites ont été rapprochés du genre Bonamia. Il s'agit de Mikrocytos mackini qui affecte les huîtres creuses, Crassostrea gigas au Canada et M. Roughleyi qui affecte les huîtres sauvages en Australie, Saccostrea commercialis. Ces quatre parasites sont regroup

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24

Ibikounle, Moudachirou. "Les Schistosomoses au Bénin : épidémiologie et écologie des interactions hôte-parasite." Perpignan, 2006. http://www.theses.fr/2006PERP0706.

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Ce travail présente une étude épidémiologique et une étude des interactions hôte-parasite sur les schistosomoses au Bénin. Au plan épidémiologique, une synthèse bibliographique de l'état des travaux réalisés sur les schistosomoses dans l'espace de la Communauté Economique des Etats de l'Afrique de l'Ouest (CEDEAO) a été menée. Au Bénin, nos analyses épidémiologiques ont permis de confirmer l'existence de deux espèces de schistosomes humains : S. Haematobium et S. Mansoni sur les cinq signalées dans l'espace CEDEAO dans lequel le Bénin se situe (S. Haematobium, S. Mansoni, S. Guineensis, S. Bov

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25

Fredensborg, Brian Lund, and n/a. "Ecological interactions between the trematode parasite Maritrema novaezealandensis (Microphallidae) and its intermediate hosts in the New Zealand intertidal soft-sediment community." University of Otago. Department of Zoology, 2005. http://adt.otago.ac.nz./public/adt-NZDU20060810.154001.

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Most, if not all, animals will at some stage in their lives encounter parasites. Some of the most widespread and abundant parasites belong to the Class Trematoda. Trematodes often have a substantial negative impact on individual intermediate host ecology. In this thesis, I investigate ecological and evolutionary consequences of the interaction between the microphallid trematode, Maritrema novaezealandensis, and its intermediate snail and crustacean hosts. Parasites often show a heterogeneous spatial distribution pattern in natural animal host populations. In this study, factors determining t

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26

Dubois, Jacques. "Phylogénie moléculaire et morphologique des Pimplinae (Hymenoptera, Ichneumonidae) parasites d'araignées : scénarios évolutifs du mode de parasitisme." Paris, Muséum national d'histoire naturelle, 2005. http://www.theses.fr/2005MNHN0063.

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Les Pimplinae sont une des sous-familles d’Ichneumonidae dont les modalités de relation hôtes-parasitoïdes sont les plus diversifiées et dont la biologie est parmi les mieux connues. Des hypothèses phylogénétiques ayant déjà été établies sur des bases morphologiques pour la sous-famille, nous avons (1) confirmé ces hypothèses à l’échelle générique à partir de données moléculaires originales basées sur l‘étude des ADNr 28S,16S et du CO1; (2) approfondi les relations de parenté au sein du groupe de genres Polysphincta ; (3) établi des hypothèses sur l’évolution du parasitisme au sein du groupe.

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27

Le, Brun Nathalie. "Spécificité des relations hôtes-parasites : le modèle Cyprinidae-Diplozoon." Montpellier 2, 1988. http://www.theses.fr/1988MON20055.

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La spécificité parasitaire est abordée à travers les modèles fournis par 4 espèces du genre Diplozoon, parasite branchial de Cypirindae. Plusieurs populations de Diplozoon sont étudiées et comparées dans le sud de la France et en Suisse (lac de Neuchatel)

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28

Tabouret, Guillaume. "Oestrus ovis(linné 1761) [Diptera : oestridae] chez les ovins : application à la caractérisation des tumeurs mammaires." Toulouse 3, 2001. http://www.theses.fr/2001TOU30021.

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29

Nno, Mabiala Alix Dania. "Mécanismes et agents de la virulence chez les parasitoïdes hyménoptères Braconides du genre Asobara : le cas particulier d'A. Japonica." Amiens, 2009. http://www.theses.fr/2009AMIE0109.

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Le succès reproducteur d'un parasitoïde dépend en grande partie de sa capacité à infester son hôte et à s’y développer. Les parasites sont généralement capables d’éviter, de neutraliser ou de détourner la réponse immunitaire innée de leur hôte. Le processus le plus répandu est la production de facteurs immunosuppresseurs bloquant cette réponse, ou de facteurs toxiques provoquant la mort des cellules de défense. Ce travail de thèse porte sur la comparaison des mécanismes et des agents de la virulence chez les Hyménoptères braconides du genre Asobara. L’étude a porté sur deux espèces, A. Japonic

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30

Badets, Mathieu. "Etude de la plasticité de développement de Polystoma gallieni, parasite de la rainette méridionale Hyla meridionalis : approches écologiques et moléculaires." Perpignan, 2008. http://www.theses.fr/2008PERP0937.

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La théorie synthétique de l'évolution attribue aux processus du développement une nouvelle dimension dans notre compréhension de l'histoire de la vie. Comme les forces de sélection naturelles et sexuelles, les forces du développement pourraient favoriser ou contraindre la diversification des espèces. Par le jeu d'une combinatoire génétique et par une étonnante capacité d'interaction avec l'environnement, le développement d'un individu pourrait donc être dévié dans sa trajectoire afin d'augmenter survie et reproduction. Ainsi, le développement qui permet l'expression d'une information (génétiqu

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31

Davies, Charlotte Mary. "Snail-schistosome interactions and the evolution of virulence." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343421.

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32

Kelly, Colleen Kay. "Host use and foraging in the parasitic plant Cuscuta subinclusa." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184543.

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Foraging theory predicts active responses by organisms upon encounter with a resource, as opposed to the passive responses of differential survivorship and growth. Stems of the parasitic plant Cuscuta subinclusa invest in resource acquisition (coil) relative to host quality in a way predicted by the marginal value theorem (MVT) in that: (1) stem coiling, the necessary antecedent and determinant of resource uptake, precedes exploitation of host materials; and (2) mean coiling on a host species is proportional to: (a) mean growth/haustorium, (b) mean biomass accumulation over the season, and (c)

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McKay, Derek Mark. "Aspects of the neurobiology of two parasitic platyhelminths, with observations on host-parasite interactions." Thesis, Queen's University Belfast, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335561.

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Pollok, Richard. "Cryptosporidium parvum : host-parasite interactions." Thesis, Queen Mary, University of London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402442.

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Herbert, Julian Richard. "Stochastic processes for parasite dynamics." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368164.

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36

Watson, Andrew Keith. "Characterising microsporidian host-parasite interactions." Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3504.

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Microsporidia are an enormously successful group of obligate intracellular fungal parasites that infect most eukaryotes including humans. In my thesis I have analysed and compared microsporidian genomes to identify which genes have been conserved, and which lost, during the transition of the group to parasitism, sequenced the transcriptome of a mixed infection of Trachipleistophora hominis in a rabbit kidney cell line, and provided a description of the T. hominis intracellular lifecycle. My results demonstrate that microsporidian genome evolution is extremely dynamic; with huge loss of genes i

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37

Hallowell-Evans, Cara Louise. "Parasite control on thoroughbred studs." Thesis, University of Liverpool, 2017. http://livrepository.liverpool.ac.uk/3022893/.

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Gastrointestinal parasite infections impact on the health and welfare of Thoroughbreds (TB). The parasites of concern include the strongyles; cyathostomins and Strongylus vulgaris, Parascaris equorum and Anoplocephala perfoliata. In addition, there is increasing recognition of liver fluke infections in horses. Life-long parasite control is needed and use of anthelmintic drugs is the major approach, but decades of intensive anthelmintic usage has promoted widespread resistance particularly in cyathostomins and Parascaris equorum. Intensive anthelmintic usage is defined as the administration of

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38

Ali, K. S. M. "Immunity to Leishmania mexicana parasite." Thesis, Nottingham Trent University, 2014. http://irep.ntu.ac.uk/id/eprint/156/.

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Background: Cutaneous Leishmaniasis caused by the Leishmania mexicana complex is associated with unpleasant or disfiguring lesions, for which there only limited treatment options. The life cycle of L. mexicana consists of two stages which involve different immune evasion mechanisms: promastigote and amastigote. Understanding parasitic interactions with host cells and developing a protective vaccine could improve the management and treatment of the disease. Aims: • To construct and compare the immunogenicity of 3 Leishmania genes in 3 different plasmids. • Study the effect of long term in vitro

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Caldevilla, Sonia. "Demodex folliculorum : parasite de l'homme." Paris 5, 1999. http://www.theses.fr/1999PA05P094.

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40

Fedna, Jimmy. "Prévalence du parasite Angiostrongylus cantonensis en Haïti chez les rats et gastéropodes." Electronic Thesis or Diss., Bourgogne Franche-Comté, 2024. http://www.theses.fr/2024UBFCD017.

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Ma recherche examine la prévalence et la répartition du parasite Angiostrongylus cantonensis en Haïti, également connu sous le nom de ver pulmonaire du rat, et qui est la première cause de méningite à éosinophiles chez l’homme dans le monde. Ce parasite a un cycle de vie complexe impliquant à la fois des hôtes définitifs (rats) et des hôtes intermédiaires (escargots et les limaces). J’ai documenté l'écologie du parasite et sa persistance deux décennies après sa découverte initiale dans le pays. Trois objectifs ont été fixés : synthétiser les connaissances sur les dimensions spatiales et écolog

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Morga, Benjamin. "Etude des interactions hôte/parasite chez l'huître plate Ostrea edulis et son parasite Bonamia ostreae." Phd thesis, Université de La Rochelle, 2010. http://tel.archives-ouvertes.fr/tel-00618480.

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L'histoire de l'ostréiculture française met en évidence la fragilité de cette production face à la surexploitation des stocks et l'apparition de maladies. En particulier, la production d'huître plate, Ostrea edulis, a fortement diminué suite à l'apparition de deux maladies parasitaires dont la bonamiose. Les moyens de lutte contre la bonamiose sont relativement restreints. Ils sont essentiellement basés sur la surveillance de la santé des huîtres afin de limiter la dissémination et la propagation de la maladie. Cependant l'utilisation de modèles prédictifs de l'évolution de la maladie en zone

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Brewster, Bernice. "Aquatic Parasite Information : a database on parasites of freshwater and brackish fish in the United Kingdom." Thesis, Kingston University, 2016. http://eprints.kingston.ac.uk/39278/.

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A checklist of parasites of freshwater fish in the UK is an important source of information concerning hosts and their distribution for all aspects of scientific research. An interactive, electronic, web-based databse, Aquatic Parasite Information has been designed, incorporating all freshwater and brackish species of fish, parasites, taxonomy, synonyms, authors and associated hosts, together with records for their distribution. One of the key features of Aquatic Parasite Information is this checklist can be updated. Interrogation of Aquatic Parastie Information has revealed that some parasite

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Lester, Hannah. "Anthelmintic resistance in equine parasites : an epidemiological approach to build a framework for sustainable parasite control." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2029559/.

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Faecal egg count (FEC) directed targeted anthelmintic treatment programmes and regular efficacy testing using the faecal egg count reduction test (FECRT) have been advocated to support evidence-based helminth control in horses. One major hurdle to their widespread application is that horse owners/managers and those that prescribe anthelmintics may have insufficient knowledge on which to base evidence-based protocols. The ultimate aim of this study was to create a framework for a decision support system (DSS) to support evidence-based helminth control in horses. To create the framework, the dia

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Davis, Richard Elliot. "Neutrophil responses to infection with leishmania parasites: MHC class II-expression and parasite life-stage interactions." Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/2200.

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The vector-borne protozoan Leishmania spp. cause the spectrum of disease known as leishmaniasis in human and animal hosts. The most common manifestations of leishmaniasis are the chronic, ulcerative skin disease cutaneous leishmaniasis (CL), and the more serious visceral leishmaniasis (VL) in which parasites take up residence in internal organs, causing death if not treated. The role of neutrophils (PMNs) in the immune response to CL and VL is unclear. It is s generally thought that PMNs are only a short-lived effector cell, and have been disregarded as playing a role in chronic Leishmania spp

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Bouchut, Anne. "La compatibilité dans l’interaction Biomphalaria glabrata/Echinostoma caproni : recherche de gènes candidats." Montpellier 2, 2007. http://www.theses.fr/2007MON20009.

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Les interactions hôte-parasite entre mollusques et trématodes se caractérisent par un polymorphisme de compatibilité qui se manifeste par la présence de couples compatibles (hôte susceptible et/ou parasite virulent) et de couples incompatibles (hôte résistant et/ou parasite avirulent) en populations naturelles. Afin d’appréhender les déterminants moléculaires responsables de cette compatibilité différentielle entre le mollusque Biomphalaria glabrata et le trématode parasite Echinostoma caproni, plusieurs études moléculaires comparatives ont été réalisées sur deux souches de B. Glabrata, suscep

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Khalaf, Sahira. "Parasite epidemiological and pollution/parasite interaction studies on sticklebacks (Gasterosteus aculeatus L.) from the River Wandle." Thesis, King's College London (University of London), 1998. https://kclpure.kcl.ac.uk/portal/en/theses/parasite-epidemiological-and-pollutionparasite-interaction-studies-on-sticklebacks-gasterosteus-aculeatus-l-from-the-river-wandle(86b59e83-fa4d-4a7c-8a08-87112517c39b).html.

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White, Emily Claire. "Infection by the gastrointestinal parasite Trichuris muris : defining the microbiota of the parasite and the host." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/infection-by-the-gastrointestinal-parasite-trichuris-muris-defining-the-microbiota-of-the-parasite-and-the-host(e29ed75d-014d-4e36-87ed-a6db82845511).html.

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Intestinal dwelling parasites live in close association with the complex microbiota that inhabit our intestinal tracts. The intestinal helminth, Trichuris muris, depends on these bacteria for egg hatching and successful establishment of infection within the epithelium of the caecum and colon. Infection causes significant alterations to the host intestinal microbiota, including a decrease in bacterial diversity and shifts in proportions of certain bacterial groups. This is accompanied by a decrease in Foxp3+ regulatory T cells and changes to the metabolic potential of the host microbiota, conse

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Raine, John Dale. "Proteomic analysis of the malarial parasite." Thesis, Imperial College London, 2005. http://hdl.handle.net/10044/1/11358.

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Tompkins, Daniel Michael. "Evolutionary ecology of bird-parasite associations." Thesis, University of Oxford, 1996. http://ora.ox.ac.uk/objects/uuid:a5f5ea19-b799-490b-b738-99ff52df25c1.

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This thesis investigates the ecological determinants of chewing louse (Insecta: Phthiraptera) host-specificity on four species of Malaysian swiftlets (Aves: Apodidae). Influences of host coloniality on louse ecology were also demonstrated, illustrating the dependence which these permanent ectoparasites have on their hosts. Louse collections were made to look for incidences of host-specific lice occurring on the "wrong" host ("straggling"). Straggling was observed, implying that lice disperse among host species. Thus, opportunity for louse dispersal (or lack thereof) does not govern the host-sp

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Edwards, J. C. "Parasite-induced changes in host behaviour." Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380108.

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