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.
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Showing 1 to 20 of 22 for “"Fecal Bacteria"”.
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Characterizing the distribution of planktonic fecal bacteria in the James River, Richmond, Virginia
Surface waters containing fecal bacteria present significant public health risks. Understanding the sources of and factors affecting the distribution of fecal-indicating bacteria is necessary to predict potential illnesses more effectively. This thesis presents two studies on the distribution of …
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Biofilms as sources of fecal bacteria contamination in the stormwater drainage system in Singapore
… was performed to examine a possible source of fecal bacteria contamination originating from within the stormwater drainage system in Singapore. The extent of fecal bacteria presence in storm drain biofilms was evaluated as a pathway for fecal bacteria contamination. In the research, biofilms …
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PCR-DDGE Comparison of Fecal Bacteria From Captive and Wild Populations of the Endangered San Esteban Island Chuckwalla (Sauromalus varius)
… structural polymers. This study analyzes the bacterial populations from fecal/uric acid deposits of wild and captive samples of the endangered, herbivorous San Esteban chuckwalla (Sauromalus varius: Iguanidae). Substrate and diet samples were also analyzed. Most studies of digestive symbionts …
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Release and Transport of Bacteria and Nutrients from Livestock Manure Applied to Pastureland
Transport of fecal bacteria and nutrients from point and nonpoint sources to surface water bodies is of significant concern in Virginia and the United States. In Virginia, 4,320 river miles are impaired for one or more beneficial use and 72% of the streams are impaired due to pathogen indicators …
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Comparing Alternative Methods of Simulating Bacteria Concentrations with HSPF Under Low-Flow Conditions
… completely. Under these "low flow" conditions, fecal bacteria directly deposited in the stream dominate in-stream bacteria loads. When developing a Total Maximum Daily Load (TMDL) to address a bacterial impairment in an upland, rural watershed, direct deposit (DD) fecal bacteria sources …
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The role of Cladophora glomerata as a habitat for bacterial communities and a reservoir of antibiotic resistance.
… and analyzed the community composition of the bacterial colonizers of C. glomerata mats by taking samples of water and C. glomerata mats from 4 sites along nearshore Lake Ontario and 2 wetland sites. Using plate screening techniques, bacteria resistant to ampicillin were found at all sites and …
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Determining Sources of Fecal Contamination in Two Rivers of Northumberland County, Virginia
… are closed to harvest due to contamination with fecal bacteria. These two rivers are located in Northumberland County, Virginia, and empty into the lower Potomac River and the Chesapeake Bay. Bacterial source tracking (antibiotic resistance analysis of Eschericia coli) was used to determine the …
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Developing a Novel Antibiotic Resistance Detection Method for Water Systems using IDEXX TECTA Technologies
… including antimicrobial-resistant (AMR) bacteria. These bacteria not only present a significant risk to public health but also impose considerable economic costs. Traditional methods for detecting resistance, though effective, are hindered by slow results, the need for intensive labor, …
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Assessment of the Quality of Domestic water in Kinondoni District, Dar es salaam, Tanzania
… Objectives were: (i) to determine levels of fecal and total coliform bacteria in domestic water supplied from private wells (boreholes) and water trucks, and compare these with the Tanzania Drinking Water Standards of 2008; (ii) to assess the physical quality of domestic water using pH, …
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The Utility of Culture Independent Methods to Evaluate the Fecal Microbiome in Overweight Horses Fed Orchard Grass Hay
… efforts to evaluate metabolic variables and the fecal microbiome in adult horses fed grass hay. In the first study, eight Arabian geldings limit-fed an 18% vs. 12% non-structural carbohydrate (NSC) hays in a cross-over design during two 28-day periods were included to evaluate the influence of …
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American Alligator Fecal Coliform and Pathogen Identification, Genotypic Fingerprinting, and REP-PCR Bacterial Source Tracking in South Carolina
… (i.e. cold-blooded) wildlife sources, including fecal coliform identification, genotypic fingerprinting, and bacterial source tracking. The overall goals were to identify, fingerprint, and detect American alligator (<em>Alligator mississippiensis</em>) fecal coliform bacteria in surface waters, …
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Impact of Animal Waste Best Management Practices on the Bacteriological Quality of Surface Water
… including the watershed outlet, and analyzed for fecal coliform, total coliform, and fecal streptococcus bacteria. Other data compiled from the watershed included hydrologic, meteorologic, geologic and land use data, also collected on a regular basis. Data were collected continuously throughout …
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Essays in health and development economics
… shallow tubewell water, which was protected from fecal bacteria; arsenic-free and easily accessible surface water, which was heavily exposed to fecal bacteria; or distant and inconvenient potable water, which was more likely to be exposed to bacteria at the point-of-use. As bacterial contamination …
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Identifying Sources of Fecal Pollution in the Appomattox River Watershed
… South-Central Virginia) for the development of bacterial Total Maximum Daily Loads (TMDLs). The Appomattox River watershed is primarily undeveloped with 70.8% of the land forested, 17.0% used for agriculture (mainly livestock production), and 7.7% classified as water, wetland or barren land. The …
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Immunomodulatory effects of whole yeast cells and capsicum in weanling pigs challenged with pathogenic escherichia coli
… E. coli strain. Growth performance, fecal bacteria counts, frequency of diarrhea, clinical blood outcomes, intestinal cytokine gene expression, T cell profiles, and recall nitric oxide (NO) production from isolated peripheral blood mononuclear cells (PBMC) stimulated with E. coli …
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A Combined Field And Laboratory Investigation Into The Transport Of Fecal Indicator Microorganisms Through A Shallow Drinking Water Aquifer In Bangladesh
… of a shallow groundwater aquifer by fecal bacteria. The context for this study is a field site located in a rural area of Bangladesh that represents a microcosm for the many challenges facing the approximately 2 billion people worldwide who rely upon groundwater for their daily needs. …
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Estimating Bacterial Loadings to Surface Waters from Agricultural Watersheds
Fecal bacteria and pathogens are a major source of surface water impairment. In Virginia alone, approximately 73% of impaired waters are impaired due to fecal coliforms (FC). Because bacteria are a significant cause of water body impairment and existing bacterial models are predominantly based upon …
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Determining Sources of Fecal Pollution in Washington D.C. Waterways
… of Enterococci was used to determine sources of fecal contamination in three District of Columbia waterways: Rock Creek, the Anacostia River, and the Potomac River. These three waterways were identified as exceeding water quality standards set for fecal coliform levels and were designated by the …
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Abundance of Antibiotic Resistance Genes in Feces Following Prophylactic and Therapeutic Intramammary Antibiotic Infusion in Dairy Cattle
… an internal non-antibiotic teat sealant. Fecal grab samples were collected for each cow on d -2 (baseline, used as covariate), d 1, 3, 5, 7, and once per week until d 49. Fecal samples were collected in sterile containers, then freeze-dried and subject to DNA extraction. The abundance of …
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