Browsing by Subject "E. coli"
Now showing items 1-20 of 30
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Adaptive Evolution for the Study of Complex Phenotypes in Microbial Systems
(2013-07-24)Microbial-based industrial production has experienced a revolutionary development in the last decades as chemical industry has shifted its focus towards more sustain- able production of fuels, building blocks for materials, ... -
An Analysis of the Tsr-LsrB Interaction During Autoinducer-2 Chemotaxis In Escherichia coli
(2017-07-31)Escherichia coli senses a variety of chemoeffectors. The Tsr chemoreceptor is known to mediate attractant response to serine. Previously, serine was the only attractant described for Tsr. Recent work suggests Tsr senses ... -
Bacterial Source Tracking in Impaired Watersheds: Evaluation of Culture-Dependent and -Independent Methods for Increased Source Specificity and Improved Management
(2013-05-02)Bacterial contamination due to excessive levels of bacteria is a confounding problem and remediation of impaired watersheds relies on the detection of fecal indicator bacteria and then assessing the source of said bacteria. ... -
Biogeochemistry of Urban, Suburban, and Rural Ponds and Lakes in South-Central Texas
(2018-05-09)Urban lotic surface waters have been extensively studied due to reported increases in their alkalization and dissolved organic carbon (DOC). However, urban lentic surface waters, which are subject to the same United States ... -
Bioremediation of the organophosphate methyl parathion using genetically engineered and native organisms
(Texas A&M University, 2005-11-01)Toxic waste disposal problems have become enormous due to the proliferation of xenobiotic compounds for use in agricultural, industrial and numerous other applications. Organophosphate (OP) pesticides are commonly used in ... -
Challenges of Pathogen Control in Beef Cattle Production and Processing in South Texas
(2013-01-04)This multi-phase project was designed (1) to evaluate existing post-harvest process controls and intervention strategies used to reduce Escherichia coli O157:H7, (2) to evaluate the impacts of cattle source and environmental ... -
Characterization and evaluation of Escherichia coli biotype I strains for use as surrogates for enteric pathogens in validation of beef carcass interventions
(2009-05-15)Antimicrobial interventions implemented in slaughter establishments for the reduction of enteric pathogens on beef carcasses must be validated to demonstrate efficacy under commercial operation conditions. Validation studies ... -
Development and application of the spatially explicit load enrichment calculation tool (select) to determine potential E. coli loads in watersheds
(2009-05-15)According to the USEPA National Section 303(d) List Fact Sheet, bacterial pathogens are the leading cause of water quality impairments in Texas. The automated Spatially Explicit Load Enrichment Calculation Tool (SELECT) ... -
Distribution of E. coli Levels and Recreation Use as Factor of Stream Order in the Central Great Plains, Central Oklahoma-Texas Plains, and South Central Plains Ecoregions
(2015-05-06)This study examines the relationship of E. coli concentrations and recreational use to both stream order and watershed size. To determine possible ecoregion effects, the E. coli data used in this study were obtained from ... -
Effects of Dairy Manure Management Systems and Wastewater Disinfection Processes on E. coli Phylotype Distribution
(2016-12-06)Sections of streams located downstream from dairy farms and wastewater treatment plants (WWTPs) in central Texas are listed on the 303 (d) List of Impaired Waters due to bacterial contamination (possibly due to fecal ... -
Estimating Associated Human Health Risk from Recreational Exposures in Fresh Water Bodies Impacted by Multiple Fecal Sources
(2019-07-31)Pathogens are the leading cause of impairment for rivers and streams in the United States. Microbial contamination in recreational water bodies was the cause of 510 waterborne disease outbreaks in the United States. Water ... -
Estimation of E. coli Concentrations from Failing On-Site Wastewater Treatment Facilities (OWTS) Using GIS
(2014-08-12)Failing Onsite Wastewater Treatment Systems (OWTSs) have been identified as a significant threat to water quality, discharging significant amounts of inadequately treated sewage effluents. When developing a Watershed ... -
Estimation of E. coli Concentrations from Non Point Sources Using GIS
(2012-10-19)When developing a Watershed Protection Plan (WPP) or a Total Maximum Daily Load (TMDL), it is often difficult to accurately assess the pollutant load for a watershed because not enough water quality monitoring data are ... -
ETHYLENE PRODUCTION FROM E. COLI
(2012-04-20)Ethylene is one of the most important and commonly used chemicals. Production of ethylene from a renewable resource would greatly reduce the amount of petroleum used in chemical processing. This would be a great help to ... -
Evaluation of Antimicrobial Interventions Applied During Further Processing of Raw Beef Products to Reduce Pathogen Contamination
(2017-07-31)This project was designed to validate antimicrobial applications on intact beef subprimals, frozen beef, and moisture-enhanced beef for the reduction of Shiga toxinproducing Escherichia coli (STEC). In-plant validation ... -
Evaluation of Methods to Assess and Reduce Bacterial Contamination of Surface Water from Grazing Lands
(2012-10-19)Excessive bacterial levels are a major water quality concern. Better methods are needed to quantify the proportion of bacterial loading contributed by various sources, and best management practices are needed to restore ... -
A Geographical Approach to Tracking Escherichia coli and Nutrients in a Texas Coastal Plains Watershed
(2011-02-22)Carters Creek in Brazos County, Texas, like many surface water reaches in the Texas Gulf Coast region, has been identified for bacteria and nutrient impairment on the Texas Commission on Environmental Quality (TCEQ) 303(d) ... -
In-plant Validation of Two Antimicrobial Agents Applied During the Production of Tenderized and/or Enhanced Beef Products
(2013-08-28)Numerous outbreaks of foodborne illness have been attributed to non-intact beef (e.g., tenderized, marinated, and enhanced) products contaminated with Escherichia coli O157:H7. Organic acids are commonly utilized in the ... -
Influence of autoinducer 2 (ai-2) and ai-2-like inhibitors generated from ground beef on escherichia coli o157:h7 protein expression
(2009-05-15)Autoinducer 2 (AI-2) molecules produced by bacterial cells are thought to be involved in controlling a variety of bacterial cellular processes by coordinated gene and protein expression. Previous work in our laboratory has ... -
Influences of External Factors on Escherichia Coli Distribution, Concentration, Sources, and Fate in Secondary Environments
(2016-04-26)E. coli contamination in surface waters is a universal issue that signifies increased risks to human health. Understanding E. coli fate, transport, sources, and distribution in watersheds is critical for reducing these ...