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 20 of 20 for “"one-host"”.
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Population Biology and Landscape Ecology of Digenetic Trematode Parasites in their Gastropod Hosts, with Special Emphasis on Echinostoma spp.
… involving both vertebrate and invertebrate hosts, and are grouped into 1 of 2 categories. Allogenic parasites have at least one host capable of moving between aquatic habitats, while autogenic species have all hosts restricted to a single body of water. These life cycle categories help shape …
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Plasmid Structure and Function in Plant-Pathogenic Pseudomonas Syringae (outer-Membrane Proteins)
… tobacco pathogens contain predominately one type of plasmid species, pJP27.00-type. The remaining six tobacco-specific strains do not harbor plasmids. The oat pathogens contain either one, two or three plasmids. DNA homology studies indicate, that the plasmid DNAs are highly conserved. …
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The biology of poplar rust in the South Western Cape with special reference to the carbon physiology of the host-biotroph relationship
An investigation of the host-obligate biotroph relationship of a commonly occurring rust fungus in the South Western Cape, Melampsora sp., infecting Populus canescens (Aiton) Sm., was stimulated by the apparently non-harmful effect of the pathogen on its host. The healthy appearance of the infected …
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Remapping territorial faultlines: Conflicts between separatist groups and host states
… versus nation conflicts. Since most states "host" several ethnonational or indigenous groups within their borders, an examination of the conditions under which internal geopolitical faultlines (or historical/cultural divisions) transform into militarized disputes is warranted. Several …
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Cross-Species Translocation of mRNA from Host Plants into the Parasitic Plant Dodder
… live by tapping into the vascular tissue of a host plant. Contents of the host phloem translocate readily into the parasite, and shared plasmodesmata have been documented between host cortical cells and dodder searching hyphae. Dodder is known to transmit viruses from one host to another, which …
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Molecular Detection of Tick-Borne Pathogens Associated With Ixodid Tick Species Infesting Migratory Songbirds and Ruminants
… various infectious agents to their vertebrate hosts. Ticks attached to birds and ruminants are capable of carrying tick-transmitted microorganisms. In our study, the prevalence of tick-borne pathogens was examined in ticks infesting migratory songbirds and Pakistani ruminants. During spring …
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Molecular Phylogenetic Relationships of North American Dermacentor Ticks Using Mitochondrial Gene Sequences
… lineage, and that all four species of one-host <em>Dermacentor</em> ticks also form a monophyletic lineage within the genus. The placement of the former <em>Anocentor</em> species, <em>D. nitens</em> and <em>D. dissimilis</em> in Dermacentor is also well supported. The winter tick, …
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The Role of Dysfunctional Na+/H+ Exchange in the Development of Dysbiosis and Subsequent Colitis
… too rapid to be accounted for by genetics alone. Among those, Inflammatory Bowel Disease (IBD) has risen from a western disease affecting industrialized populations to an emerging global threat affecting diverse populations around the world. IBD is a complex disease that combines genetic …
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Water-Soluble Deep-Cavity Cavitands: Synthesis, Molecular Recognition, and Interactions with Phospholipid Membranes
… by the hydrophobic effect. These molecular hosts dimerize in the presence of certain guest molecules to form water-soluble molecular capsules. These systems have given rise to numerous novel chemical phenomena and have potential use in drug delivery. The host octaacid (OA) has been …
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Diallel analysis of diplopodia ear rot resistance in maize and an assessment of the genetic variability of Stenocarpella maydis through isozyme analysis
… for hexokinase and malate dehydrogenase and one isolate was polymorphic for hexose kinase. Fungi that have limited isozyme polymorphisms often are biotrophs or fungi with formae speciales which are usually limited to one host. These groups of fungi usually have races and this may indicate …
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Understanding the Evolution of Emerging Bacterial Pathogens in Response to Host Resistance
Understanding the evolution of parasites and hosts following a host-shit event is increasingly recognised as being of great importance to public health and the clinical/veterinary sciences in predicting the behaviour and evolutionary consequences of emerging infectious diseases. Microbial …
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Ecological and evolutionary aspects of interactions between microbes coinfecting plants
Coinfections of one host with multiple pathogen species are common, and have important implications for host health and pathogen fitness. In the research reported here, plant virus systems were used to explore the effects of coinfection on pathogen populations and host responses. Chapter 1 …
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Effects of voluntary wheel running and forced treadmill running on inflammation induced behavioral abnormalities in young and old mice
… to regulate the body’s response to infection. One host factor affecting the behavioral response to infection is aging. Due to microglia priming and exacerbated neuroinflammation, aged individuals exhibit prolonged sickness behavior and depressive-like behavior following activation of the immune …
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Host plant associations of two cochineal insect species, Dactylopius ceylonicus and D. opuntiae (Dactylopiidae: Hemiptera), on the invasive cactus species Opuntia monacantha, O. ficus-indica and a possible hybrid cactus, in South Africa
… the ability of cochineal to use more than one host plant species has validated reports of inadvertent displacement of Dactylopius ceylonicus (the original agent released in 1913) by D. opuntiae (which was originally released on Opuntia ficus-indica in 1938) on O. monacantha in South Africa. …
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Genetics and physiology of motility by Photorhabdus spp
… to reach favorable conditions, colonize a host, or have motility genes that also regulate virulence expression. It is not known how motility is regulated, or how it may confer an advantage, in the complex life cycle of Photorhabdus..</p><p>We characterized motility in Photorhabdus and found …
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Development, Characterization, and Use of Molecular Tools to Study Immune-Driven Zika Virus Evolution
… is a critical avenue to combat these pathogens. One specific group of emerging pathogens of interest is flaviviruses. Flaviviruses are arthropod-borne viruses (arbovirus) in the family Flaviviridae. The medically relevant flaviviruses can be divided into two groups – tick-borne and …
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From data to mathematical analysis and simulation in models in epidemiology and ecology
… In the second part, by starting from a basic host-parasitoid model, we study the dynamics of a 2 hosts-1 parasitoid model assuming, for the sake of simplicity, that larval stages have a fixed duration. If each host is subjected to density-dependent mortality in its larval stage, we obtain …
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The evolution and genetics of vector competence in mosquito disease vectors
… the development and transmit a parasite from one host to another. It influences variation in disease transmission among mosquito populations, hence affecting disease epidemiology. In this project, I have studied some aspects of ecological interactions and genetic factors in a step towards …
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The host-pathogen interactions of Chinook Salmon (Oncorhynchus tshawytscha) and the aquatic rhabdoviral pathogen infectious hematopoietic necrosis virus
… Northwest. Our goal was to define the unique host-pathogen interactions of Columbia River Basin Chinook salmon and their interactions with the two genogroups (U and M) of IHN viruses prevalent in the CRB to better understand the role that Chinook salmon may have in the ecology and epidemiology …
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Ecological impact of entomopathogenic nematodes used to control the large pine weevil, Hylobius abietis (Coleoptera: Curculionidae)
… (Hylobius abietis; Coleoptera: Curculionidae) is one of the most economically damaging pests in forestry across Northern Europe. Its larvae develop in coniferous tree stumps on clearfell sites and adult weevils feed on seedlings that are replanted on these sites, causing substantial mortality. As …