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A Study Evaluating Genetic Trends And Molecular Predisposition To Improved Carcass Quality Of Brahman And Brahman Influenced Cattle, Amanda M. Royer Jan 2015

A Study Evaluating Genetic Trends And Molecular Predisposition To Improved Carcass Quality Of Brahman And Brahman Influenced Cattle, Amanda M. Royer

LSU Master's Theses

The first objective of the current study was to evaluate genetic trends from 10 years of the American Brahman Breeders Association Carcass Evaluation Program from 2004 to 2013. Changes of performance in growth, carcass composition, and carcass quality traits were evaluated. Overall means were calculated to report the total average for each trait along with an average rate of change per year. Growth traits evaluated included feedlot entrance weight (INWT), harvest weight (HRVWT), and average daily gain (ADG). Carcass composition and quality traits evaluated included hot carcass weight (HCW), rib eye area (REA), marbling score (MARB), dressing percent (DP), quality …

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Characterization Of Adaptive Hyperplasia Of The Intestines Following Roux-En-Y Gastric Bypass And Vertical Sleeve Gastrectomy In Rats, Michael Brodie Mumphrey Jan 2015

Characterization Of Adaptive Hyperplasia Of The Intestines Following Roux-En-Y Gastric Bypass And Vertical Sleeve Gastrectomy In Rats, Michael Brodie Mumphrey

LSU Master's Theses

Bariatric surgery is currently the only treatment for obesity that is effective in both the short and long term. Despite this, little is known about the mechanisms through which these surgeries act. While no single critical system has yet been identified, a number of major hypotheses have been proposed. One hypothesis is that adaptive hyperplasia of the intestines following Roux-en-Y gastric bypass (RYGB) surgery is required in order to receive the beneficial effects of the surgery. In this thesis I characterized the adaptive response of the intestines following RYGB and showed that significant hyperplasia occurs in the intestinal mucosa. In …

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Herbivore Response To Soybean Under Differing Induction Methods, John L. Dryburgh Jan 2015

Herbivore Response To Soybean Under Differing Induction Methods, John L. Dryburgh

LSU Master's Theses

Plants are attacked by a variety of herbivore feeding guilds and respond with specific responses to specific attacks, which may be localized or systemic. How a plant defends against one feeding guild may alter the plant’s response against a different feeding guild. A better understanding of these interactions will allow for the development of refined pest management programs. One situation in which this may occur is in interactions between chewing and piercing/sucking herbivores, such as aphids. Aphids are important crop pests primarily due to their ability to transmit viruses, the efficacy of which can be affected by plant defenses. To …

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Evaluating The Effects Of Vacuum Tumbling With Chitosan Nanoparticles And Water-Soluble Chitosan On The Shelf Life Of Cryogenically Frozen Shrimp, Alexander Chouljenko Jan 2015

Evaluating The Effects Of Vacuum Tumbling With Chitosan Nanoparticles And Water-Soluble Chitosan On The Shelf Life Of Cryogenically Frozen Shrimp, Alexander Chouljenko

LSU Master's Theses

Chitosan (CH) is a biopolymer obtained from the deacetylation of chitin, a polysaccharide present in the exoskeleton of crustaceans and cell walls of fungi. Application of CH may be limited by its water-insolubility. It can be dissolved in acids and forms relatively high viscosity solutions. CH solutions have antioxidant and antimicrobial properties. CH penetration into shrimp may be facilitated by vacuum tumbling with low viscosity chitosan-sodium tripolyphosphate (CH-TPP) nanoparticle or water-soluble chitosan (WSC) solutions. It is expected that this would reduce lipid oxidation and microbial loads. In this study, CH-TPP and WSC solutions were developed and applied to shrimp, and …

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Stress, Anxiety Symptomology, And The Need For Student Support Services For University Freshmen Of First-Generation Status, Low-Ses Backgrounds, And Those Registered With Disabilities, Kelly Dale Allison Jan 2015

Stress, Anxiety Symptomology, And The Need For Student Support Services For University Freshmen Of First-Generation Status, Low-Ses Backgrounds, And Those Registered With Disabilities, Kelly Dale Allison

LSU Master's Theses

Three populations of concern for professional social workers in higher educational settings include first-generation college students (FGCSs), students from low socio-economic (low-SES) backgrounds, and students with disabilities. As the national demand for degrees in higher education rises both socially and economically, the push for young adults’ postsecondary success becomes increasingly crucial. In college and university settings, a significant portion of students may be classified as FGCSs, low-SES, or may be registered with a disability. Examining these vulnerable populations within higher education settings, particularly regarding stress and anxiety symptomology, can help social workers recognize the social, developmental, and academic inhibitions that …

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Evaluation Of The Impact Of Changes In Commodity Income Support Measures Included In The Agricultural Act Of 2014 On Equitable Louisiana Rice Production Rental Arrangements, Abdallahi Ould Abderrahmane Jan 2015

Evaluation Of The Impact Of Changes In Commodity Income Support Measures Included In The Agricultural Act Of 2014 On Equitable Louisiana Rice Production Rental Arrangements, Abdallahi Ould Abderrahmane

LSU Master's Theses

ABSTRACT This research uses a Simetar simulation technique to evaluate the effect of the adoption of the Price Loss Coverage program included in the 2014 Agricultural Act on Louisiana’s rice equitable rental arrangement choices. Two scenarios are examined: one in which prices of the last three years are detrended and a second one in which they are not detrended. Each scenario includes six rental arrangements (Cash rent, Fixed Price, Fixed Yield, 60/40, 70/30, 80/20) and each rental arrangement has four adjustments (base, price trigger, yield trigger, and price and yield trigger). Three different risk measure analysis were conducted: Mean-Variance, Value …

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Effects Of Minor Elements On Cercospora Kikuchii, Cercospora Leaf Blight And Rust On Soybeans, Brian Michael Ward Jan 2015

Effects Of Minor Elements On Cercospora Kikuchii, Cercospora Leaf Blight And Rust On Soybeans, Brian Michael Ward

LSU Master's Theses

Soybean (Glycine max) is one of the most widely grown crops in the world. Many pathogens attack soybeans, but of particular importance to tropical and subtropical areas such as Louisiana is Cercospora leaf blight (CLB). This disease is caused by the fungus Cercospora kikuchii and favored by high temperatures. This fungus utilizes a toxin, cercosporin, as its primary pathogenicity factor. Soybean rust (SBR), caused by Phakopsora pachyrhizi, is another common disease that occurs in Louisiana under cooler environmental conditions of spring and fall. Both diseases occur regularly in Louisiana and may result in severe yield losses. Cercospora kikuchii has recently …

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Evaluation Of Whey-Protein-Isolate Edible Films Containing Oregano (Origanum Vulgare) Essential Oil To Improve Shelf Life Of Cheeses During Refrigerated Storage, Cristhiam Gurdian Jan 2015

Evaluation Of Whey-Protein-Isolate Edible Films Containing Oregano (Origanum Vulgare) Essential Oil To Improve Shelf Life Of Cheeses During Refrigerated Storage, Cristhiam Gurdian

LSU Master's Theses

Oregano essential oil (OEO) is recognized for antimicrobial and antioxidant properties. Incorporation of OEO into an edible film prepared with whey protein isolate (WPI) may improve the shelf-life of queso blanco (cheese). The overall goal of the proposed study was to develop and evaluate the effectiveness of antimicrobial and antioxidant WPI edible films (WPIFs) with OEO to improve the shelf life of queso blanco wrapped in the WPIFs during one month of refrigerated storage. Production of potential antimicrobial and antioxidant WPIFs with OEO (WPIOF) was possible. Flaxseed oil (FO) was incorporated into cheese by homogenization (HFQ), which caused significant susceptibility …

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The Production Of Marketable Vegetable Transplants Using Sustainable Locally Sourced Soilless Media Amendments, Amber Dawn Parker Jan 2015

The Production Of Marketable Vegetable Transplants Using Sustainable Locally Sourced Soilless Media Amendments, Amber Dawn Parker

LSU Master's Theses

Public demand for sustainable local and organic food products has led these systems to become one of the fastest growing sectors in the agricultural food market. Consumers are willing to pay a premium for food produced using organic or sustainable practices. Local and small-scale farmers are striving to develop sustainable and in some cases USDA certified organic systems in production of vegetables and fruit. Warm season crops are commonly produced using transplants. Evaluation of nutrient availability is needed for the use of readily available local waste-streams byproducts, such as manures and composts, for amendments or fertilizers in order to manage …

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A Quantitative And Molecular Evaluation Of Bovine Respiratory Disease, Growth Traits, And Carcass Traits In Crossbred Steers, Samantha Lidia Miller Jan 2015

A Quantitative And Molecular Evaluation Of Bovine Respiratory Disease, Growth Traits, And Carcass Traits In Crossbred Steers, Samantha Lidia Miller

LSU Master's Theses

The first objective of the two studies presented herein evaluated on farm sources of variation and correlated effects contributing to BRD incidence in a population of crossbred steers sent to the feedlot from 2010-2013. Analyses revealed that incidence of BRD was lowly positively correlated to birth weight (BW) and lowly negatively correlated to weaning weight (WW), hip height (HH), sire breed, site, and birth year. These results indicate that the traits analyzed herein are not precursors for BRD in the current population. However, since little is still known about the correlation between genetic predisposition to BRD and animal performance, further …

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Oil And Gas Platforms On Ship Shoal, Northern Gulf Of Mexico As Habitat For Reef-Associated Organisms, David Bradley Reeves Jan 2015

Oil And Gas Platforms On Ship Shoal, Northern Gulf Of Mexico As Habitat For Reef-Associated Organisms, David Bradley Reeves

LSU Master's Theses

Nearshore Louisiana has experienced substantial changes within the last half-century, including the annual formation of the world’s second largest hypoxic zone and the construction of thousands of oil and gas platforms (rigs). Ship Shoal and its rigs may provide important substrate in nearshore Louisiana because rigs act as de facto artificial reefs and the shoal’s bottom waters were well oxygenated on 43% of days when surrounding areas were hypoxic. From July to September of 2014, fish assemblages and hydrography were compared at shoal rigs, rigs inshore of the shoal, and rigs offshore of the shoal, and stone crab populations were …

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The Effect Of Processing Method Of Distiller's Dried Grains With Solubles On Hen Egg Production, Egg Quality, And Yolk Color, Lindsay Renee Brunet Jan 2015

The Effect Of Processing Method Of Distiller's Dried Grains With Solubles On Hen Egg Production, Egg Quality, And Yolk Color, Lindsay Renee Brunet

LSU Master's Theses

Distiller’s dried grains with solubles (DDGS) is a common byproduct of the ethanol industry and is used in animal feeds. Carotenoids (xanthophylls) are already present in the human eye, and increasing the amount of carotenoids in the eye can help prevent eye diseases. The purpose of this research was to confirm that adding DDGS to standard corn and soybean meal hen diets may increase the amount of lutein available in egg yolks. An experiment was conducted with Hy-Line W-36 hens to evaluate the effects of DDGS in corn-soybean meal diets. Three hundred fifteen hens were fed one of seven treatment …

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Live And Carcass Characteristics Of Boer- And Savannah-Cross Kid Buckling Goats Fed Dried Distillers Grain With Solubles, James Neil Maynard Jan 2015

Live And Carcass Characteristics Of Boer- And Savannah-Cross Kid Buckling Goats Fed Dried Distillers Grain With Solubles, James Neil Maynard

LSU Master's Theses

The available supply of domestic goat meat has not matched the increased demand for goat meat. High cost of production is a concern of goat producers, with feed being a major factor in input expenses. Increasing slaughter weight of kid meat goats would increase the available goat meat, but requires added nutrition beyond that obtained from typical forage based systems for goat production. Savannah bucklings (n=31) and Boer bucklings (n=28) were stratified by weight and breed and were randomly assigned a treatment of 0 (T1), 15 (T2), 30 (T3), or 45 (T4) percent dried distillers grain with solubles (DDGS). One …

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Evaluation Of Enhanced Efficiency Nitrogen Fertilizers On Corn Production Systems In The Mid-South, Shanice M. Jones Jan 2015

Evaluation Of Enhanced Efficiency Nitrogen Fertilizers On Corn Production Systems In The Mid-South, Shanice M. Jones

LSU Master's Theses

Nitrogen (N) is often the most yield limiting nutrient, particularly in corn (Zea mays L.) production systems. In the Mid-South, high N application rates have the potential to lead to high N loss. To minimize this loss, proper N management should focus on improving N use efficiency (NUE) while optimizing productivity. The potential to achieve both tasks can be met using enhanced efficiency N fertilizer (EENF). However, limited research has directly compared the active chemicals in EENFs for corn production in the Mid-South. A study was conducted in 2013 and 2014 at two locations in Louisiana to determine the effectiveness …

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Parental Age At Conception: An Examination Of Risk Factors Related To Autism Severity And Comorbid Psychopathology, Robert D. Rieske Jan 2015

Parental Age At Conception: An Examination Of Risk Factors Related To Autism Severity And Comorbid Psychopathology, Robert D. Rieske

LSU Doctoral Dissertations

Many researchers have cited the continuing increase in the prevalence of autism worldwide and have speculated on the potential causes of that increase. One theory that suggests at least a contributory effect is the general trend for parents to have children at later ages. Previous research has begun to examine the relationship between advanced parental age at conception and the incidence of autism and have noted strong relationships between advanced parental age and other developmental disabilities. The purpose of this study was to not only confirm the relationship between advanced parental age and autism risk but to extend that knowledge …

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The Baby And Infant Screen For Children With Autism Traits: A Dsm-5 Update, Matthew Jason Konst Jan 2015

The Baby And Infant Screen For Children With Autism Traits: A Dsm-5 Update, Matthew Jason Konst

LSU Doctoral Dissertations

Interest surrounding the investigation of autism spectrum disorder (ASD) has increased exponentially since it was initially described over a half-century ago. With this passage of time our conceptualization of the ASD diagnosis has undergone multiple changes. An increasing trend in research has been an emphasis on early identification and intervention. This trend has brought about the creation and adaptation of multiple measures designed to inform early ASD diagnosis. Recently, the ASD diagnostic category underwent significant revisions. In response to revisions, it is necessary to adapt preexisting measures to reflect these significant changes in order to maintain diagnostic accuracy. The Baby …

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Development And Evaluation Of Fiber And Pectin Based Delivery Systems For Delivering Lactobacillus Plantarum , Arranee Chotiko Jan 2015

Development And Evaluation Of Fiber And Pectin Based Delivery Systems For Delivering Lactobacillus Plantarum , Arranee Chotiko

LSU Doctoral Dissertations

Probiotics may improve gut microbial composition and immune function. Introduction of probiotics via foods or supplements may result in the probiotics not surviving during processing and passage through the stomach to the large intestine. The overall objective of this study was to develop and investigate three delivery systems for delivering live probiotic cells (Lactobacillus plantarum NRRL B-4496) (LP). The three delivery systems were: (1) immobilized LP (~108-109 CFU/mL LP Free Cells) on purple rice bran fiber (PRF) (Delivery system 1), (2) encapsulated LP with combined pectin-rice bran extract (Delivery system 2), and (3) double encapsulated LP …

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Release, Stability And Functionality Of Nanodelivered Hydrophobic (Lutein And Beta-Carotene) And Hydrophilic (Folic Acid) Antioxidants Using Zein Nanoparticles, Thanida Chuacharoen Jan 2015

Release, Stability And Functionality Of Nanodelivered Hydrophobic (Lutein And Beta-Carotene) And Hydrophilic (Folic Acid) Antioxidants Using Zein Nanoparticles, Thanida Chuacharoen

LSU Doctoral Dissertations

Nanodelivery systems enable innovations that can benefit foods and human health on a large scale in the coming years. The instabilities of antioxidants during food processing and during digestion are drawbacks that can be successfully addressed by nanoentrapment. This research provided technical strategies to synthesize zein nanoparticles loaded with hydrophobic/hydrophilic antioxidants, and to study the release profiles and physical stability of nanocarriers and chemical stability of entrapped bioactives under on-shelf and GI conditions. The results supported the potential of zein nanoparticles stabilized by surfactants to improve chemical stability of entrapped lutein, and to slowly release lutein under PBS conditions. Same …

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Developing Co-Current And Counter-Current Spray Drying Computational Fluid Dynamics (Cfd) Simulation Studies To Predict The Quality Of Microencapsulated Fish Oil With Egg White Hydrolysates Powders, Kevin Estuardo Mis Solval Jan 2015

Developing Co-Current And Counter-Current Spray Drying Computational Fluid Dynamics (Cfd) Simulation Studies To Predict The Quality Of Microencapsulated Fish Oil With Egg White Hydrolysates Powders, Kevin Estuardo Mis Solval

LSU Doctoral Dissertations

Eggs are an excellent source of high quality protein containing all essential amino acids (EAA) including leucine. Food-grade protein hydrolysates can enhance the growth of lactic acid bacteria (LAB). Thermal degradation of bioactives normally occurs during microencapsulation by spray drying. Spray drying modeling using computational tools is essential to engineer new food powders and to minimize and thermal degradation of bioactives. The first chapter of this work discusses the optimization of an enzymatic process in terms of reaction temperature, pH, enzyme:substrate ratio, and reaction time using a response surface methodology (RSM) to produce food-grade protein hydrolysates from egg whites (EWH). …

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Insights Into The Development Of Chemotherapeutics Targeting Pfkfb Enzymes, Robert Blake Crochet Jan 2015

Insights Into The Development Of Chemotherapeutics Targeting Pfkfb Enzymes, Robert Blake Crochet

LSU Doctoral Dissertations

The PFKFB enzymes control the primary checkpoint in the glycolytic pathway and are implicated in a multitude of diseases: from cancer, to schizophrenia, to diabetes, and heart disease. The inducible isoform, PFKFB3, is known to be associated with the upregulation of glycolysis in many cancers. The first study within this work investigates the potential for using tier-based approaches of virtual screening to target small molecule kinases, with PFKFB3 serving as a case study. For this investigation, bioactive compounds for PFKFB3 were identified from a compound library of 1364 compounds via high-throughput screening, with bioactive compounds being further characterized as either …

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Sensory Perception Of Saltiness And Bitterness In Oil-In-Water Emulsions, Damir Dennis Torrico Jan 2015

Sensory Perception Of Saltiness And Bitterness In Oil-In-Water Emulsions, Damir Dennis Torrico

LSU Doctoral Dissertations

The objective of this research was to evaluate saltiness and bitterness perception in oil-in-water emulsion systems. For that purpose, three experiments were performed: A sensory threshold study, a descriptive sensory and physical property evaluation, and a psychophysical assessment of taste perception in emulsion systems. Experiment-I: Sensory detection and recognition thresholds of NaCl, caffeine, and KCl in aqueous-solutions vs. oil-in-water emulsions were evaluated. For saltiness recognition thresholds, KCl thresholds were higher compared to those of NaCl. For NaCl and KCl, emulsions did not significantly affect the saltiness recognition threshold compared to that of solutions. The bitterness recognition thresholds of caffeine and …

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Estimating Desirable Cattle Traits Using Latent Class And Mixed Logit Models: A Choice Modeling Application To The U.S. Grass-Fed Beef Industry, Isaac Sitienei Jan 2015

Estimating Desirable Cattle Traits Using Latent Class And Mixed Logit Models: A Choice Modeling Application To The U.S. Grass-Fed Beef Industry, Isaac Sitienei

LSU Doctoral Dissertations

This study examines the preferences for cattle traits using mixed logit and latent class models. Choice experiment data from a 2013 mail survey of 1,052 U.S. grass-fed beef producers were used. The findings indicate that grass-fed beef producers generally preferred lower-priced, heavy animals that were small-to-medium framed and easy to handle for grass-finishing. Black animals that were retained from their own calves were preferred. Relative to intact males, steers and heifers were preferred. Except for the estimated parameter for the weight attribute, the standard deviations for the temperament, body frame, source, color, gender, and price attribute levels were significant at …

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A Spatial Analysis Of Obesity And Its Associations With The Built And Natural Environment, Physical Inactivity, And Socioeconomic And Demographic Conditions In The United States Of America, Mustafa Erdem Jan 2015

A Spatial Analysis Of Obesity And Its Associations With The Built And Natural Environment, Physical Inactivity, And Socioeconomic And Demographic Conditions In The United States Of America, Mustafa Erdem

LSU Doctoral Dissertations

Obesity has strong genetic determinants but the genetic composition of the population does not change rapidly. Thus in this study, the major changes in non-genetic factors such as the development of obesogenic environments and shifting socioeconomic status and lifestyle of individuals are hypothesized to increase the risk of obesity. As the prevalence of obesity continue to increase worldwide with substantial attention in the US, a clearer understanding of how spatial associations between obesity and confounding factors are interrelated is crucial to better tackle the issue of obesity. This study employs the ‘global’ and ‘local’ Exploratory Spatial Data Analysis (ESDA) methods …

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Health Effects Of Dietary Fermentable Fiber (Resistant Starch), Diana Gabriela Carvajal-Aldaz Jan 2015

Health Effects Of Dietary Fermentable Fiber (Resistant Starch), Diana Gabriela Carvajal-Aldaz

LSU Doctoral Dissertations

Resistant starch (RS) reaches the large intestine for fermentation and is considered a prebiotic. We wanted to determine if we could reduce fermentation for future mechanistic studies and how there is improved insulin sensitivity in human studies with or without increased incretin hormone glucagon-like peptide 1 (GLP-1). Two main studies were performed. In the first main study, low potency antibiotics (Ampicillin 1g/L and Neomycin 0.5g/L) were added to the drinking water of rats to reduce fermentation of RS. Antibiotics were used either prior (first) to or during (second) feeding of RS. Results demonstrated that low potency antibiotics given prior to …

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Distribution And Female Reproductive State Differences In Orexigenic And Anorexigenic Neurons In The Brain Of The Mouthbrooding African Cichlid Fish, Astatotilapia Burtoni, Danielle Tiffany Porter Jan 2015

Distribution And Female Reproductive State Differences In Orexigenic And Anorexigenic Neurons In The Brain Of The Mouthbrooding African Cichlid Fish, Astatotilapia Burtoni, Danielle Tiffany Porter

LSU Master's Theses

The integration of reproduction and metabolism is necessary for the survival and continuation of a species. While the neural circuits controlling energy homeostasis have been well-characterized, the signals controlling the relay of nutritional information to the reproductive axis are not conclusively defined. The cichlid fish Astatotilapia burtoni is ideal for studying the neural regulation of feeding and reproduction because during their parental care phase, females undergo a two-week period of forced starvation while holding developing young in their buccal cavity. To test the hypothesis that candidate neuropeptides known to be involved in feeding and energy homeostasis in mammals show conserved …

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A Domesticated Idea: British Women Writers And The Victorian Recipe, 1845-1910, Helana E. Brigman Jan 2015

A Domesticated Idea: British Women Writers And The Victorian Recipe, 1845-1910, Helana E. Brigman

LSU Doctoral Dissertations

Until recently, critics have devalued the Victorian cookbook as an object of literary inquiry, regularly dismissing it as “Victoriana”—cultural, anthropological histories detailing bland culinary traditions. A Domesticated Idea: British Women Writers and the Victorian Recipe, 1845-1910 seeks to provide a framework by which we can explore the Victorian cookbook as a literary text appropriated by writers responding to and advocating for cultural, educational, and artistic reform during the mid-to-late nineteenth century. Looking specifically at how women used recipes to discuss food preparation, dining, and household management, I argue that British women writers participated in a collaborative tradition, borrowing and sharing …

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Omega-3 Fatty Acid Status In Overweight Pregnant Women Of Louisiana, Adriana Virginia Gaitan Jan 2015

Omega-3 Fatty Acid Status In Overweight Pregnant Women Of Louisiana, Adriana Virginia Gaitan

LSU Master's Theses

Omega-3 fatty acids are well known to benefit pregnant women and infant outcomes. More women are entering pregnancy with excess weight which puts them at higher risk for complications such as gestational diabetes, preeclampsia, and preterm delivery, amongst others. In the present study we assessed the omega-3 fatty acid (docosahexaenoic acid, DHA) status in overweight (BMI = 25.0 - 29.9 kg/m2) pregnant women of Louisiana. Age, ethnicity, weeks of pregnancy, weight, and length were recorded for each participant. Dietary intakes were assessed by repeated 24-h dietary recalls using the University of Minnesota Nutrient Data System for Research. Blood samples were …

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Effect Of Attention Retraining On Pathological Eating Behaviors And Body Dissatisfaction, Jose Silgado Jan 2015

Effect Of Attention Retraining On Pathological Eating Behaviors And Body Dissatisfaction, Jose Silgado

LSU Doctoral Dissertations

Prevalence rates of pathological eating behaviors (PEB) and body dissatisfaction are high among college women, and rates are rising among college men. PEB and body dissatisfaction are also risk factors for the development of clinically significant eating disorders. Further, a lesser studied factor involved in male body dissatisfaction is drive for muscularity. With approximately 70% of college women and 45% of college men experiencing body dissatisfaction, it is important to identify its potential etiological and maintaining risk factors. One such mechanism may be the construct of attentional bias. Research suggests that individuals that engage in PEB or have high levels …

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Pathogenic Enteric Viruses In Louisiana Oysters And Environmental Waters, Naim Montazeri Djouybari Jan 2015

Pathogenic Enteric Viruses In Louisiana Oysters And Environmental Waters, Naim Montazeri Djouybari

LSU Doctoral Dissertations

Norovirus (NoV) and pathogenic enteroviruses are the major causes of gastroenteritis in humans worldwide, and are usually transmitted through direct or indirect exposure to raw or partially treated sewage. Filter-feeding shellfish concentrate virus particles from the water and transmit them to humans. The occurrence of norovirus GI and GII and fecal indicators in Louisiana eastern oysters (Crassostrea virginica) and harvest water were investigated on a biweekly basis for almost one year. Only one oyster sample was positive for NoV GII at 3.5 log10 genomic copies/g digestive tissues. A stool specimen obtained from an infected individual associated with a norovirus outbreak …

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Evolutionary Relationships Among Fungal Soybean Pathogens And Molecular Marker Development In The Genus Cercospora, Sebastian Albu Jan 2015

Evolutionary Relationships Among Fungal Soybean Pathogens And Molecular Marker Development In The Genus Cercospora, Sebastian Albu

LSU Doctoral Dissertations

Cercospora leaf blight (CLB) and purple seed stain (PSS) are common soybean diseases in the Gulf South of the United States (USA). For nearly a century, Cercospora kikuchii has been considered as the only pathogen causing these diseases. However, previous reports of genetic diversity among isolates collected throughout Louisiana suggested the presence of multiple lineages or species. Recent systematic studies classified species of Cercospora using a taxonomic system based on phylogenetic analysis of five nuclear loci (legacy genes). Using a similar approach, cercosporoid fungi tentatively identified as C. kikuchii were evaluated along with 53 other species of Cercospora. No …

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