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dc.contributor.supervisor Byrne, James M.
dc.contributor.supervisor Gannon, Victor P. J.
dc.contributor.author Mori, Julie Y.
dc.contributor.author University of Lethbridge. Faculty of Arts and Science
dc.date.accessioned 2007-04-25T16:21:58Z
dc.date.available 2007-04-25T16:21:58Z
dc.date.issued 2001
dc.identifier.uri https://hdl.handle.net/10133/137
dc.description xi, 268 leaves ; 28 cm. en
dc.description.abstract E. coli 0157:H7 were isolated from 0.86% (n=1520) water samples and Salmonella species from 6.04% (n=1456) samples collected within the Oldman River watershed in southern Alberta. Peak prevalence of E. coli0157:H7 in July 2000 was 6.3% (n=48). Peak prevalence of Salmonella was 16.2% (n=11) in August 1999 and 33.% (n=42) in July 2000. Prevalence was greater in water from some sampling locations than from others. In non-filtered surface water E. coli0157:H7 and S. typhimurium numbers decreased significantly faster at 20 degrees celsius than at 10 degrees celsius (P=0.000); however this difference did not exist when the same water was filtered (P=0.439). Pathogen survival in one water sample was greater when it was filtered (0.2um pore) than when it was not filtered even though there were no autochthonous bacteria in the water prior to filtration. en
dc.language.iso en_US en
dc.publisher Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2001 en
dc.relation.ispartofseries Thesis (University of Lethbridge. Faculty of Arts and Science) en
dc.subject Escherichia coli 0157:H7 en
dc.subject Salmonella en
dc.subject Water -- Pollution -- Alberta en
dc.subject Dissertations, Academic en
dc.title Prevalence and survival of Escherichia coli 0157:H7 and Salmonella spp. in surface waters of Southern Alberta en
dc.type Thesis en
dc.publisher.faculty Arts and Science
dc.publisher.department Department of Geography
dc.degree.level Masters


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