Christopher Kephart
Hydrologist, Ohio-Kentucky-Indiana Water Science Center
Science and Products
Filter Total Items: 28
Performance of Traditional and Molecular Methods for Detecting Biological Agents in Drinking Water Performance of Traditional and Molecular Methods for Detecting Biological Agents in Drinking Water
To reduce the impact from a possible bioterrorist attack on drinking-water supplies, analytical methods are needed to rapidly detect the presence of biological agents in water. To this end, 13 drinking-water samples were collected at 9 water-treatment plants in Ohio to assess the performance of a molecular method in comparison to traditional analytical methods that take longer to perform...
Authors
Donna S. Francy, Rebecca N. Bushon, Amie M. G. Brady, Erin E. Bertke, Christopher M. Kephart, Christina A. Likirdopulos, Brian E. Mailot, Frank W. Schaefer, H.D. Alan Lindquist
Comparison of traditional and molecular analytical methods for detecting biological agents in raw and drinking water following ultrafiltration Comparison of traditional and molecular analytical methods for detecting biological agents in raw and drinking water following ultrafiltration
Aims: To compare the performance of traditional methods to quantitative polymerase chain reaction (qPCR) for detecting five biological agents in large-volume drinking-water samples concentrated by ultrafiltration (UF). Methods and Results: Drinking-water samples (100 l) were seeded with Bacillus anthracis, Cryptospordium parvum, Francisella tularensis, Salmonella Typhi, and Vibrio...
Authors
D.S. Francy, R.N. Bushon, A.M.G. Brady, E.E. Bertke, C.M. Kephart, C.A. Likirdopulos, B.E. Mailot, F. W. Schaefer, H.D. Alan Lindquist
Use of Spatial Sampling and Microbial Source-Tracking Tools for Understanding Fecal Contamination at Two Lake Erie Beaches Use of Spatial Sampling and Microbial Source-Tracking Tools for Understanding Fecal Contamination at Two Lake Erie Beaches
Source-tracking tools were used to identify potential sources of fecal contamination at two Lake Erie bathing beaches: an urban beach (Edgewater in Cleveland, Ohio) and a beach in a small city (Lakeshore in Ashtabula, Ohio). These tools included identifying spatial patterns of Escherichia coli (E. coli) concentrations in each area, determining weather patterns that caused elevated E...
Authors
Donna S. Francy, Erin E. Bertke, Dennis P. Finnegan, Christopher M. Kephart, Rodney A. Sheets, John Rhoades, Lester Stumpe
Bacteriological water quality in the Lake Pontchartrain basin, Louisiana, following Hurricanes Katrina and Rita, September 2005 Bacteriological water quality in the Lake Pontchartrain basin, Louisiana, following Hurricanes Katrina and Rita, September 2005
The U.S. Geological Survey (USGS), in collaboration with the Louisiana Department of Environmental Quality, monitored bacteriological quality of water at 22 sites in and around Lake Pontchartrain, La., for three consecutive weeks beginning September 13, 2005, following hurricanes Katrina and Rita and the associated flooding. Samples were collected and analyzed by USGS personnel from the...
Authors
Donald M. Stoeckel, Rebecca N. Bushon, Dennis K. Demcheck, Stanley C. Skrobialowski, Christopher M. Kephart, Erin E. Bertke, Brian E. Mailot, Scott V. Mize, Robert B. Fendick
Science and Products
Filter Total Items: 28
Performance of Traditional and Molecular Methods for Detecting Biological Agents in Drinking Water Performance of Traditional and Molecular Methods for Detecting Biological Agents in Drinking Water
To reduce the impact from a possible bioterrorist attack on drinking-water supplies, analytical methods are needed to rapidly detect the presence of biological agents in water. To this end, 13 drinking-water samples were collected at 9 water-treatment plants in Ohio to assess the performance of a molecular method in comparison to traditional analytical methods that take longer to perform...
Authors
Donna S. Francy, Rebecca N. Bushon, Amie M. G. Brady, Erin E. Bertke, Christopher M. Kephart, Christina A. Likirdopulos, Brian E. Mailot, Frank W. Schaefer, H.D. Alan Lindquist
Comparison of traditional and molecular analytical methods for detecting biological agents in raw and drinking water following ultrafiltration Comparison of traditional and molecular analytical methods for detecting biological agents in raw and drinking water following ultrafiltration
Aims: To compare the performance of traditional methods to quantitative polymerase chain reaction (qPCR) for detecting five biological agents in large-volume drinking-water samples concentrated by ultrafiltration (UF). Methods and Results: Drinking-water samples (100 l) were seeded with Bacillus anthracis, Cryptospordium parvum, Francisella tularensis, Salmonella Typhi, and Vibrio...
Authors
D.S. Francy, R.N. Bushon, A.M.G. Brady, E.E. Bertke, C.M. Kephart, C.A. Likirdopulos, B.E. Mailot, F. W. Schaefer, H.D. Alan Lindquist
Use of Spatial Sampling and Microbial Source-Tracking Tools for Understanding Fecal Contamination at Two Lake Erie Beaches Use of Spatial Sampling and Microbial Source-Tracking Tools for Understanding Fecal Contamination at Two Lake Erie Beaches
Source-tracking tools were used to identify potential sources of fecal contamination at two Lake Erie bathing beaches: an urban beach (Edgewater in Cleveland, Ohio) and a beach in a small city (Lakeshore in Ashtabula, Ohio). These tools included identifying spatial patterns of Escherichia coli (E. coli) concentrations in each area, determining weather patterns that caused elevated E...
Authors
Donna S. Francy, Erin E. Bertke, Dennis P. Finnegan, Christopher M. Kephart, Rodney A. Sheets, John Rhoades, Lester Stumpe
Bacteriological water quality in the Lake Pontchartrain basin, Louisiana, following Hurricanes Katrina and Rita, September 2005 Bacteriological water quality in the Lake Pontchartrain basin, Louisiana, following Hurricanes Katrina and Rita, September 2005
The U.S. Geological Survey (USGS), in collaboration with the Louisiana Department of Environmental Quality, monitored bacteriological quality of water at 22 sites in and around Lake Pontchartrain, La., for three consecutive weeks beginning September 13, 2005, following hurricanes Katrina and Rita and the associated flooding. Samples were collected and analyzed by USGS personnel from the...
Authors
Donald M. Stoeckel, Rebecca N. Bushon, Dennis K. Demcheck, Stanley C. Skrobialowski, Christopher M. Kephart, Erin E. Bertke, Brian E. Mailot, Scott V. Mize, Robert B. Fendick