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 57 for “"Fecal coliforms"”.
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Persistence of Culturable Antibiotic Resistant Fecal Coliforms From Manure Amended Vegetable Fields
… and persistence of antibiotic-resistant fecal coliforms, a common family of fecal indicator bacteria used to track the environmental spread of antibiotic resistance. Soil samples were collected eight times over a 120-day period and analyzed for fecal coliforms utlizing a suite of …
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The effects of rhodamine WT and chlorine on the recovery of fecal coliforms
Fecal coliforms suspended in a natural stream water were exposed to rhodamine WT dye, chlorine and both in combination. Samples were analyzed for coliforms by three enumeration techniques. Statistical analyses of data by the paired-t test showed that for non-chlorinated samples no significant …
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Hydrodynamic and Water Quality Simulation of Fecal Coliforms in the Lower Appomattox River, Virginia
… it violates current water quality standards for fecal coliforms. To advance the analytical process by which various scenarios for improving water quality within the estuary are examined, an array of computer-based hydrodynamic and water quality models were investigated. The Dynamic Estuary Model …
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An evaluation of a modified membrane filter procedure for enumerating stressed fecal coliforms in chlorinated sewage effluents
… filter) in Blacksburg, Virginia and analyzed for fecal coliforms using three procedures. Physical parameters including total suspended solids, DO, pH, turbidity, temperature and total chlorine residual were measured in effort to ascertain their effect on fecal coliform recoveries. The three …
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A study of a modified membrane filter technique for the enumeration of stressed fecal coliforms in urban runoff
… Virginia were analyzed by several techniques for fecal coliform recovery. The samples were also analyzed for heavy metal concentrations. Statistical analyses of data by the paired-t test showed that the standard membrane filter technique (MF) yielded significantly lower recoveries (0. 05 level) …
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An evaluation of a modified membrane filter technique for the recovery of fecal coliforms exposed to selected heavy metals
… techniques for their efficiency in recovering fecal coliforms exposed to selected heavy metals. The effects on recovery by increasing time and metal concentration were also examined. The recovery methods employed included the standard membrane filter technique (S-MF) and a modified membrane …
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Monitoring of Selected Bacteriological Parameters Associated with the Sinking Creek Total Maximum Daily Load (TMDL).
… added to the state 303 (d) list and a TMDL for fecal coliforms developed. The study objectives were to 1) identify areas in Sinking Creek with elevated levels of fecal coliforms and 2) compare data collected to results from watershed models used in the TMDL. Fourteen sites on Sinking Creek were …
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Sediment Transport and Pathogen Indicator Modeling in Lake Pontchartrain
… that would determine the fate and transport of fecal coliform bacteria in the lake. The processes included hydrodynamics, waves, sediment transport, and the decay and transport of the fecal coliforms. Wind and tidal effects were accounted along with the freshwater inflows. All the components of …
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Determining Sources of Fecal Pollution in Water for a Rural Virginia Community
… (BST) methodology to determine sources of fecal pollution in water for a rural community (Millwood, VA). Antibiotic resistance analysis (ARA) is the primary BST method for fecal source identification, followed by randomly amplified polymorphic DNA (RAPD) analysis for confirmation. Millwood …
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Evaluation of bacteriophage and viral persistence during alkaline stabilization in sludge and biosolids intended for land application
… The survivability of poliovirus type 1, fecal coliforms, Salmonella, adenovirus type 5, rotavirus Wa, and the male-specific bacteriophage MS-2 was evaluated under lime stabilization conditions in various matrices. Salmonella and fecal coliforms were evaluated at 28°C and poliovirus …
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An investigation of the effects of ozone in a recirculating aquacultural production system
… including: heterotrophic plate count, total coliforms, fecal coliforms, total solids, and total volatile solids. Results indicated ozone had a significantly positive effect in the recirculating aquacultural production system. Further study is recommended, however, to better understand the …
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Análise microbiológica da carne suína in natura comercializada em feiras livres da microrregião do brejo paraibano
… of July to September 2012, to count total and fecal coliforms at 36 oC (NMP/g), Count Total Aerobic Bacteria mesophytic (UFC/g), Staphylococcus spp. and Salmonella ssp. (Presence or absence). According to the results obtained it was found that all samples except the control, showed high levels …
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Densities of indicator bacteria in urban and rural runoff
… baseline densities for total coliform, fecal coliform, and fecal streptococcus. Results indicated that mean values for total coliforms and fecal coliforms during dry flow were within Virginia State standards for urban runoff, but exceeded those two standards 100 percent and 91.9 percent …
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Wastewater renovation with soil depth as influenced by additional treatment of septic tank effluent
… soil infiltration rates, 92 and 96% reduction in fecal coliforms, 34 and 44% reduction in total nitrogen, and a 60 and 94% reduction in BOD₅, respectively. Fecal coliforms were present only in soil leachate from the 15 and 30 cm soil depths receiving septic tank effluent and the 15 cm depth that …
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A field-based study of alternative microbial indicator tests for drinking water quality in Northern Ghana
… as a single presence/absence (P/A) indicator for fecal coliforms; (2) To establish the accuracy of as a single enumerative test for fecal coliforms; (3) To verify the accuracy of the 20 ml H2S test used in conjunction with Easygel® as an improved method of quantifying contamination as compared …
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The effect of distance between artificial drainage facilities and disposal trenches on the movement of biological and chemical pollutants from septic tank effluent
… table behavior. Groundwater analysis included fecal coliforms, the NH₄, NO₃, NO₂, Na, Ca, Mg, Cl and PO₄ ions, pH and EC. Ammonium concentrations in the soil beneath the trenches indicated nonuniform effluent infiltration yet more uniform than with conventional gravity flow distribution. High …
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The Use of Selected Water Quality Parameters to Identify Fecal Coliform Sources in Support of the Sinking Creek Total Maximum Daily Load.
… A Total Maximum Daily Load (TMDL) for fecal coliforms was developed. The purpose of this study was to investigate the use of water quality parameters to identify areas that contribute to the fecal coliform loading. Concentrations of nitrate-N, orthophosphates, BOD, alkalinity, hardness, …
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Colonization of Biofilms in a Freshwater Stream by Escherichia Coli and Bacteroides
Detection of fecal contamination of freshwater streams has traditionally been assessed by fecal coliforms and Escherichia coli, but new research methods have allowed for the use of the anaerobic, enteric bacterium Bacteroides for molecular marker fecal detection. However, a confirmation of the …
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Υγιεινολογικός έλεγχος των πόσιμων υδάτων του γεωγραφικού διαμερίσματος Ηπείρου
… of water pollution (total count, total coliforms, fecal coliforms and enterococci) were used in this study. Also, 334 strains grown on the m-Endo agar (enterobacteriaceae) were further identified. Fifteen hundred and fifty samples of potable water from the region of Epirus were examined. …
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