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Filth Flies As A Vector For Some Pathogenic Bacteria Transfer, Ahmet Buyukyavuz
Filth Flies As A Vector For Some Pathogenic Bacteria Transfer, Ahmet Buyukyavuz
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Two separate sets of experiments were conducted to determine the transfer of bacteria by flies. An Escherichia coli ampicillin-resistant strain with a fluorescent gene was used during the experiments. The first set of experiments were divided into two trials to measure the transfer of E. coli by fruit flies to apple slices and bologna during short term exposure. Short time exposure (1, 5 and 15 min) of flies to inoculated apple slices were tested in the first trial to determine the transfer of E. coli to flies. No difference (P>0.05) in the number of bacteria transferred to flies were …
Detecting And Monitoring Foodborne Illness Outbreaks: Twitter Communications And The 2015 U.S. Salmonella Outbreak Linked To Imported Cucumbers, Yuliya V. Bolotova, Jie Lou, Ilya Safro
Detecting And Monitoring Foodborne Illness Outbreaks: Twitter Communications And The 2015 U.S. Salmonella Outbreak Linked To Imported Cucumbers, Yuliya V. Bolotova, Jie Lou, Ilya Safro
Publications
This research uses Twitter, as a social media device, to track communications related to the 2015 U.S. foodborne illness outbreak linked to Salmonella in imported cucumbers from Mexico. The relevant Twitter data are analyzed in light of the timeline of the official announcements made by the Centers for Disease Control and Prevention (CDC). The largest number of registered tweets is associated with the period immediately following the CDC initial announcement and the official release of the first recall of cucumbers. [JEL: I18, Q13, Q18].
Validation Of Thermal Destruction Of Pathogenic Bacteria In Rendered Animal Products, Mary Hayes
Validation Of Thermal Destruction Of Pathogenic Bacteria In Rendered Animal Products, Mary Hayes
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This study tested enumeration techniques for high fat food matrices and determined thermal death times in rendering animal products. Standard Class O phosphate/magnesium chloride dilution buffer series (Dilution Series A) and a modified (pre-warmed to 32oC) lecithin phosphate dilution buffer series (Dilution Series B) were used to enumerate a Salmonella cocktail from both poultry and beef rendering materials. Results of this study indicate use of a modified lecithin buffer did not improve Salmonella enumeration accuracy from rendering materials. Instead, the results suggested use of xylose lysine deoxycholate agar (XLD) with either buffer system accurately enumerated Salmonella from rendering materials. The …
Influence Of Compost Particle Size On Pathogen Survival Under Greenhouse Condition, Junshu Diao
Influence Of Compost Particle Size On Pathogen Survival Under Greenhouse Condition, Junshu Diao
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The number of foodborne pathogen outbreaks related to fresh produce has increased significantly in recent decades. Animal waste directly applied to agricultural field is one of the possible contamination sources for fresh produce. Composting is one of the recommended means for waste treatments to eliminate or reduce pathogens in manure on farms. Although pathogens can be eliminated by proper composting process, pathogens are able to survive, recolonize and regrow on compost heap surfaces under certain conditions. Due to the outdoor nature of composting process, bioaerosols with different particle sizes can be generated on compost surfaces which can carry pathogens, travel …
Thermal Inactivation Of Stress Adapted Pathogens In Compost, Randhir Singh
Thermal Inactivation Of Stress Adapted Pathogens In Compost, Randhir Singh
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In the United States, 1.3 billion tons of animal wastes are produced annually. Disposal of this huge amount of waste on agricultural land without proper treatment is a public health safety issue as animal waste is a potential source of several human pathogens. Therefore, composting of animal wastes is an economical solution to this problem. The high temperature reached during this process also brings about inactivation of pathogens in the waste. However, survival of pathogens has still been reported from different composting studies, indicating the complex nature of this process. The objectives of this study were to: 1) study thermal …
Effect Of Crust Freezing On The Quality And Survival Of Escherichia Coli And Salmonella Typhimurium In Raw Poultry Products, Byron Chaves-Elizondo
Effect Of Crust Freezing On The Quality And Survival Of Escherichia Coli And Salmonella Typhimurium In Raw Poultry Products, Byron Chaves-Elizondo
All Theses
Industry has widely used freezing as a strategy to halt pathogen growth and more recently, crust freezing has been suggested as a means to improve mechanical operations, quality, and safety of poultry products. Two separate studies were conducted to evaluate the effect of crust freezing (20 min, -85 ¡C) on the survival of Escherichia coli and Salmonella Typhimurium and on quality and shelf life of raw chicken breasts, with or without skin. For the first study, ampicillin-resistant E. coli JM 109 and nalidixic acid-resistant S. Typhimurium were used in the experiments. A set of cultures was subjected to cold-shock stress …
Prevalence And Biological Control Of Salmonella Contamination In Rendering Plant Environments And The Finished Rendered Meals, Brandon Kinley
Prevalence And Biological Control Of Salmonella Contamination In Rendering Plant Environments And The Finished Rendered Meals, Brandon Kinley
All Dissertations
Although the rendering process serves as invaluable means for the disposal of inedible animal by-products, the finished products often harbor pathogenic and opportunistic microorganisms such as Salmonella and enterococci, respectively. The temperatures used during the rendering process far exceed the heat tolerance threshold of most bacterial species, so cross-contamination from the environment and/or from the incoming raw material is the proposed source of the contamination. Research has demonstrated that the raw material coming into the rendering facility is highly contaminated with pathogenic bacteria including Salmonella. While not in a rendering facility, studies have also demonstrated that bacteria such as Salmonella …