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Pathogenicity of viral hemorrhagic septicemia virus IVb in walleye (Sander vitreus)

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dc.contributor.advisor Lumsden, John Grice, Jessica 2012-03-22 2012-05-04T17:33:21Z 2012-05-04T17:33:21Z 2012-05-04
dc.description.abstract Recently, viral hemorrhagic septicemia virus (VHSV IVb) was associated with several walleye (Sander vitreus) mortality events in the Great Lakes. To examine the effects of route, strain-variation and temperature, walleye were experimentally infected with VHSV IVb using intraperitoneal (i.p.)-injection (102-108 pfu/fish) and immersion (w.; 1.4 x 107 virions mL-1). Walleye were relatively resistant to experimental infection with VHSV IVb, regardless of route or water temperature. High cumulative mortality (64-100%) and severe gross lesions associated with VHSV-IVb infection were only evident in fish i.p.-injected with 108 pfu at 12°C, which had mild to moderate, multifocal necrosis of several tissues including the gill and heart. There were significant differences in mortality between four walleye strains following i.p.-infection. Viral antigen was found in both i.p. and w.-exposed walleye using immunohistochemistry, mostly within the gill and skin epithelium of w.-exposed fish. VHSV IVb was detected in walleye tissues from 6-21 d post-infection using RT-qPCR. en_US
dc.description.sponsorship Great Lakes Fisheries Commission and NSERC en_US
dc.language.iso en en_US
dc.subject walleye, viral hemorrhagic septicemia virus IVb, VHSV IVb en_US
dc.subject Sander vitreus en_US
dc.title Pathogenicity of viral hemorrhagic septicemia virus IVb in walleye (Sander vitreus) en_US
dc.type Thesis en_US Pathobiology en_US Master of Science en_US Department of Pathobiology en_US

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