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Ornithodiplostomum spp. metacercariae in fathead minnows : migration, site selection, and host response

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dc.contributor.advisor Goater, Cameron
dc.contributor.author Matisz, Chelsea E
dc.contributor.author University of Lethbridge. Faculty of Arts and Science
dc.date.accessioned 2009-10-13T15:45:16Z
dc.date.available 2009-10-13T15:45:16Z
dc.date.issued 2009
dc.identifier.uri http://hdl.handle.net/10133/779
dc.description x, 125 leaves : ill. ; 29 cm. en
dc.description.abstract Site selection, and the means to access specific sites, is a keystone of parasitology. I evaluated migration and site selection behaviours of metacercariae of two congeneric species of strigeoid trematode throughout growth and encystment phases in the fathead minnow. Results showed that pre-encystment stages of Ornithodiplostomum ptychocheilus migrate along specific neural tracts to access sites in the optic lobes of the brain. Conversely, pre-encystment stages of Ornithodiplostomum sp. migrate via direct penetration, or via the vascular system to access visceral organs, especially the liver. Remarkably, both species have a bi-phasic pattern of development, with growth and encystment occurring in unique sites. Finally, I examined patterns of rodlet cell proliferation and maturation in response to growth and encystment phases of O. ptychocheilus. Cell densities were low (<11/mm2) in brain tissue adjacent to 1 and 2 week old metacercaria, but peaked to approximately 210/mm2 at 6 weeks. These results shed new light on the potential function of these enigmatic cells. en
dc.language.iso en_US en
dc.publisher Lethbridge, Alta. : University of Lethbridge, Deptartment of Biological Sciences, 2009 en
dc.relation.ispartofseries Thesis (University of Lethbridge. Faculty of Arts and Science) en
dc.subject Parasitology -- Research en
dc.subject Fathead minnow -- Research en
dc.subject Dissertations, Academic en
dc.subject Electronic dissertations en
dc.subject Trematoda -- Research en
dc.title Ornithodiplostomum spp. metacercariae in fathead minnows : migration, site selection, and host response en
dc.type Thesis en
dc.publisher.faculty Arts and Science en
dc.publisher.department Biological Sciences en

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