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.
Results
Showing 1 to 9 of 9 for “"Parasite exposure"”.
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Cancer cell behaviour following parasite exposure
… which cellular mechanisms are altered following exposure. Using several in vitro and in vivo techniques, this study aimed to determine the effect that certain helminths have on the progression of cervical and colorectal cancer. The results revealed that antigen from the hookworm Nippostrongylus …
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Freshwater fishes and microplastics in an era of multiple stressors
… by freshwater fishes. However, microplastic exposure occurs in combination with other interacting multiple stressors, for example urbanisation and parasite infection, and may potentially cause a range of synergistic negative impacts. Understanding the patterns of microplastic ingestion and …
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Chemotactic and inflammatory responses to and recognition of Encephalitozoon spp. of microsporidia
… chronic diarrhea. The intracellular, eukaryotic parasites responsible for this pathology can often disseminate, causing multiorgan infections. Dissemination of these pathogens is believed to occur through vehicular spread by macrophages. The macrophage response to microsporidia is poorly …
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Local adaptation to parasites and selection on major histocompatibility genes in ecologically divergent populations of three-spine stickleback (Gasterosteus aculeatus)
… diverge ecologically, they become exposed to new parasites and pathogens with potentially harmful fitness consequences. Populations are therefore expected to evolve resistance, possibly at a cost of less resistance to parasites rarely encountered parasites. This trade-off in resistance should …
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Emerging Infectious Disease: Host and Parasite Perspectives
… and related haematozoa are nearly ubiquitous parasites that can impose fitness costs of variable severity and may, in some cases, cause substantial mortality in their host populations. One example of the latter, the emergence of avian malaria in the endemic avifauna of Hawaii, has become a …
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Genetics and Evolution of Drosophila Humoral Immunity against Parasitoid Infections
… wasp Leptopilina boulardi is a major natural parasite of Drosophila melanogaster. However, the regulation of Drosophila humoral immunity against parasitoids is not clearly illustrated. In this thesis, I investigated the humoral immune mechanisms underlying Drosophila resistance to parasitoid …
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Prevalence and drivers of blood parasitism in African penguins (Spheniscus demersus)
… include the impacts of arthropod-borne blood parasites on the health of penguin populations. While parasitism of wild penguins has been poorly studied, susceptibility to infection with blood protozoa is well established in a wide range of penguin species held in captivity. This thesis assesses …
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Variable immunity and its consequences for parasite dynamics
… by three common factors: susceptible hosts, parasites, and environmental conditions. Over the past three decades, disease ecology has provided overwhelming evidence that environmental conditions can shape disease risk by altering host-parasite interactions. For example, shifting global …
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Ecological consequences of indigenous and non-indigenous freshwater fish parasites.
Parasites can have considerable consequences for their freshwater fish hosts, irrespective of whether they are intermediate or final hosts. The ecological consequences of infection arise from processes including parasite manipulation, where the parasite manipulates the host to increase their chance …