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

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dc.contributor.authorMatisz, Chelsea E.
dc.contributor.authorUniversity of Lethbridge. Faculty of Arts and Science
dc.contributor.supervisorGoater, Cameron P.
dc.date.accessioned2009-10-13T15:45:16Z
dc.date.available2009-10-13T15:45:16Z
dc.date.issued2009
dc.degree.levelMasters
dc.descriptionx, 125 leaves : ill. ; 29 cm.en
dc.description.abstractSite 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.identifier.urihttps://hdl.handle.net/10133/779
dc.language.isoen_USen
dc.publisherLethbridge, Alta. : University of Lethbridge, Deptartment of Biological Sciences, 2009en
dc.publisher.departmentBiological Sciencesen
dc.publisher.facultyArts and Scienceen
dc.relation.ispartofseriesThesis (University of Lethbridge. Faculty of Arts and Science)en
dc.subjectParasitology -- Researchen
dc.subjectFathead minnow -- Researchen
dc.subjectDissertations, Academicen
dc.subjectTrematoda -- Researchen
dc.titleOrnithodiplostomum spp. metacercariae in fathead minnows : migration, site selection, and host responseen
dc.typeThesisen
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