Carl Schroeder

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This study compares hypothetical and nonhypothetical responses to choice experiment questions. We test for hypothetical bias in a choice experiment involving beef ribeye steaks with differing quality attributes. In general, hypothetical responses predicted higher probabilities of purchasing beef steaks than nonhypothetical responses. Thus, hypothetical(More)
Susceptibilities to fourteen antimicrobial agents important in clinical medicine and agriculture were determined for 752 Escherichia coli isolates of serotypes O26, O103, O111, O128, and O145. Strains of these serotypes may cause urinary tract and enteric infections in humans and have been implicated in infections with Shiga toxin-producing E. coli (STEC).(More)
OBJECTIVES The objective of this study was to identify antimicrobial resistance and class 1 integrons among Shiga toxin-producing Escherichia coli (STEC). METHODS Two-hundred and seventy-four STEC recovered from poultry, cattle, swine and humans were characterized by antimicrobial susceptibility testing, screened for the presence of class 1 integrons by(More)
Four hundred and seventy-two generic Escherichia coli isolates were recovered from ground and whole retail beef, chicken, pork, and turkey obtained from Greater Washington, DC, USA during the years 1998 to 2000. Many of the isolates displayed resistance to tetracycline (59%), sulfamethoxazole (45%), streptomycin (44%), cephalothin (38%) and ampicillin(More)
Results from our model suggest that eating Salmonella enterica serovar Enteritidis-contaminated shell eggs caused 182,060 illnesses in the United States during 2000. Uncertainty about the estimate ranged from 81,535 (5th percentile) to 276,500 illnesses (95th percentile). Our model provides but 1 approach for estimating foodborne illness and quantifying(More)
Corporation announced the IBM Model 726 Tape Unit with the IBM Model 701 Defense Calculator, marking the transition from punched-card storage to digital storage on flexible magnetic tape. That bold introduction was the beginning of what is now a 50-year history of invention that has seen remarkable advances in the storage of information on flexible magnetic(More)
The widespread use of antimicrobials in human and veterinary medicine, as well as in animal production has accelerated the development of drug resistance in a variety of pathogenic bacteria. Listeria monocytogenes and Entercoccus faecium are important Gram-positive pathogens of food safety and public health concern. But their mechanisms of antimicrobial(More)
The discovery and description of hydrothermal features such as geothermal vents, gas fumaroles, and even geysers within Yellowstone Lake is presented. Research was carried out over a period of 17 years beginning in 1984 and employed SCUBA to observe the sublacustrine hot springs and microbial mats in Sedge Bay, Yellowstone Lake. These initial observations(More)
14 , and Jeanet van der Goot 6. We thank the following individuals for providing industry information: R. 13. We acknowledge and thank Vasiliki Flari 18 for her contributions to the epidemiological discussion in this report and Jeremy Mihalov 18 for his consumption analysis work. Notwithstanding the considerable help and valuable expertise provided by the(More)
Acknowledgements Many people in FSIS and USDA contributed in a very short timeframe to the timely completion of this analysis. A great deal of thanks goes to all, including Sean Altekruse, Executive Summary BACKGROUND Food Safety and Inspection Service on-line inspectors examine every young poultry carcass to ensure it is unadulterated, free of feathers,(More)