Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Experimental Infections"”.
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Pathogenesis of the Swine Coccidia in Natural and Experimental Infections and the Life Cycles of Two Eimeria Species
Made available in DSpace on 2014-12-14T13:28:21Z (GMT). No. of bitstreams: 1 8009206.pdf: 4386072 bytes, checksum: 129cf3a5f8fa0c714a72e5c0210c8425 (MD5) Previous issue date: 1979
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Natural and Experimental Infections of THELAZIA CALIFORNIENSIS Price (1930, Nematoda: Thelaziidae) with Descriptions of the Adult and Larval Parasites
<p>The purpose of this work was to determine the extent and effects of infestation of the eye worm of mammals, <em>Thelazia californiensis</em>, and to elucidate through experimentation or observation the mode of transmission.</p> <p>A survey of literature revealed that thelaziasie (infestation by …
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Pathology of parasitic infections in marine teleosts
… infected with the parasites, and in addition experimental infections of C. lingua were established in grey mullet. The most intense response was induced by R. -johnstonel in plaice, and was composed mainly of cells of the macrophage series, which included epithelioid and giant cells. …
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Characterization of Canine Leishmaniasis in the United States: Pathogenesis, Immunological Responses, and Transmission of an American Isolate of Leishmania infantum
… United States and parts of Canada. Leishmania infections are usually spread to mammals by infected sand flies, however epidemiological data do not support a role for sand fly transmission in North America. The purpose of this work was to isolate and characterize L. infantum from a naturally …
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Transmission Dynamics Of Mycobacterium Avium Subspecies Paratuberculosis In Closed Dairy Herds In The Us
… role in MAP transmission. In a metaanalysis of experimental infections of cows with MAP, most calves shed MAP within 12 months of infection. Duration of early shedding and time to late shedding were both dependent on age at exposure, while dose delivered played a role in duration of early …
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The Role of the Glyoxylate Cycle in the Pathogenesis of Mycobacterium tuberculosis
… for growth on fatty acids and for virulence in experimental infections. Although deletion of icl1 or icl2 had little impact on replication of M. tuberculosis in macrophages and mice, deletion of both genes abrogated intracellular growth, and resulted in rapid bacterial clearance from the lungs. …
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Glyoxylate Metabolism in Mycobacterium smegmatis
… (ICL), was shown to be required for virulence in experimental infections of mice. The other enzyme of the glyoxylate shunt, malate synthase (MLS), may also be important for the intracellular survival of the tubercle bacillus; yet, no studies have been done to determine its in vivo role. We present …
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African trypanosomiasis : its effect on platelet morphology, function and survival
… and parasitaemia has been investigated in experimental infections of Trypanosoma brucei brucei and Trypanosoma congolense in rabbits, and of Trypanosoma vivax in calves. Studies of platelet size, structure, function and survival have been undertaken in an attempt to ellucidate the mechanism …
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Haemonchus contortus Infections in Alpacas and Sheep
… and compartment three (C-3) of camelids. Heavy infections may cause severe anemia and death. Alpacas were first introduced into the U.S. in the 1980s. Although not true ruminants, alpacas may become infected with H. contortus and develop the same clinical signs as sheep and goats. Even though …
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The spread and evolution of RNA viruses among honey bees and the wider insect community with particular emphasis on deformed wing virus (DWV)
… still harbour low level, genetically diverse DWV infections, and have had no reported colony losses. Thirdly, I discovered two new RNA viruses in ants and wasps collected from apiaries, during a honey bee collection trip to Hawaii. Milololii virus was found to infect the Ghost ant Tapinoma …
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The Distribution and Biology of the Invasive Eyefluke of Waterfowl (Philophthalmus gralli) in Texas
… invasion history of P. gralli in Texas, and to experimentally investigate the infection dynamics of the parasite to better understand its ecology. First, I investigated the current geographic distribution and infection status of the parasite in the eyes 1,362 hunter-harvested waterfowl wintering …
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L'epatite E nei suidi: epidemiologia, diagnosi e filogenesi
… have a high level of nucleotidic omology and in experimental infections, the possibility of interspecific transmission of swine strains to humans and of human strains to non-human primates has been demonstrated. Furthermore, some seroepidemiological studies have demonstrated that people working …
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Exploring the impact of gastrointestinal parasitic helminths on the human microbiome using advanced biomolecular and bioinformatics technologies
… were to explore the impact of such helminth infections in various systems, ranging from natural multi-species infections in a developing country to highly controlled and experimental infections involving a single species of parasitic helminth. This would allow the identification of microbiome …
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Pasteurella multocida biofilm formation, and the interrelationship of P. multocida with Histophilus somni in a polymicrobial biofilm during bovine respiratory disease
… and multi-systemic diseases, bacteremia, and infections resulting from bite wounds. The glycosaminoglycan capsule (CPS) of P. multocida is an essential virulence factor, protecting the bacterium from host defenses. However, chronic infections such as bovine respiratory disease (BRD) and avian …
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Mechanism of Pathogenesis and Replication of an Avian Strain of the Hepatitis E Virus in a Chicken Model
… avirulent strains of avian HEV. We attempted to experimentally infect specific-pathogen-free (SPF) adult chickens by the natural fecal-oral route in order to systematically study HEV pathogenesis and replication and to characterize the clinical course and pathological lesions associated with …
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Early pathogenesis of Yersinia ruckeri infections in rainbow trout (Oncorhynchus mykiss, Walbaum)
… to study the early pathogenesis of Y. ruckeri infections, with emphasis on the identification of the portal of entry and the investigation of different traits in vitro that have been associated with bacterial virulence. The General Introduction gives an overview of the micro-organism, Y. …