Open Access. Powered by Scholars. Published by Universities.®

Medicine and Health Sciences Commons

Open Access. Powered by Scholars. Published by Universities.®

Graduate Theses and Dissertations

Discipline
Institution
Keyword
Publication Year

Articles 1 - 30 of 396

Full-Text Articles in Medicine and Health Sciences

Children’S Positive Peer Relationships And Their Bullying Behaviors: A Latent Profile Analysis, Lauren Mutignani Aug 2022

Children’S Positive Peer Relationships And Their Bullying Behaviors: A Latent Profile Analysis, Lauren Mutignani

Graduate Theses and Dissertations

In the current study, I aim to expand upon traditional methods for classifying children based on positive peer nominations and contribute to the field’s understanding of high-status bullies who maintain social resources despite bulling behaviors (e.g., van der Ploeg et al., 2020). Both reciprocated and one-sided (i.e., received and sent) positive peer nominations were used to distinguish socially meaningful subgroups. Participants included 659 children from 34 classrooms (M Age = 9.31 years, SD = .49 years; girls = 50.6%; Hispanic/Latino/a/x = 42.5%, White/European American = 29.9%, Black/African American = 2.3%, Asian/Asian American/Pacific Islander = 11.7%, Native American = 2.3%, Bi/Multiracial …


Bacterial Chondronecrosis With Osteomyelitis In Broilers: Genomics, Phylogenomics, And Methods To Detect Specific Pathogens During Outbreaks., Abdulkarim Abdulaziz A. Shwani Aug 2022

Bacterial Chondronecrosis With Osteomyelitis In Broilers: Genomics, Phylogenomics, And Methods To Detect Specific Pathogens During Outbreaks., Abdulkarim Abdulaziz A. Shwani

Graduate Theses and Dissertations

Lameness is a major issue in animal welfare and the broiler industry. Bacterial chondronecrosis with osteomyelitis (BCO) is one of the main causes of lameness. Many staphylococcal species, including Staphylococcus agnetis isolate 908, have been isolated from the bones and blood of lame broilers at the University of Arkansas. Staphylococcus agnetis is a coagulase-variable, Gram-positive bacterial species that has been previously associated with subclinical or mild clinical cases of mastitis in dairy cattle. The annotated complete genome of hypervirulent strain 908 was published at NCBI. In this study, it has been compared to nine genomes we assembled for hypervirulent isolates …


Mentors In Violence Prevention: Differential Impacts On Adolescent Bystander Intentions About Bullying, Dating Violence, And Sexual Harassment, Ayla Mapes Aug 2022

Mentors In Violence Prevention: Differential Impacts On Adolescent Bystander Intentions About Bullying, Dating Violence, And Sexual Harassment, Ayla Mapes

Graduate Theses and Dissertations

Bystander approaches are promising interventions that can engage bystanders as prosocial allies to intervene in interpersonal violence situations among youth within school settings. The Mentors in Violence Prevention (MVP) bystander intervention program targets interpersonal violence using a peer-to-peer mentoring model to engage students in a discussion about violence prevention. Research on the MVP program is promising but limited. The current study examined the specificity of MVP intervention effects in two high school samples. The first was a pre/post-test design that included a smaller sample of high school students who participated in the MVP program in the 2013-2014 academic year. The …


Histomonosis In Turkeys – Factors Influencing Transmission, Pathogenesis, And The Search For Prophylactic Or Therapeutic Compounds, Thainá Landim De Barros Aug 2022

Histomonosis In Turkeys – Factors Influencing Transmission, Pathogenesis, And The Search For Prophylactic Or Therapeutic Compounds, Thainá Landim De Barros

Graduate Theses and Dissertations

The incidence of histomonosis has been increasing in poultry since the ban of prophylactic and therapeutic compounds. Histomonosis is caused by the protozoa Histomonas meleagridis. The objective of this dissertation was to investigate factors impacting the pathogenesis and transmission of histomonosis and to evaluate compounds that could potentially prevent or reduce the severity of histomonosis in turkeys. In the first study, the effect of sodium chlorate and sodium nitrate on reducing histomonads growth was tested in vitro and added to a basal turkey diet. A decrease in the growth of histomonads in vitro was observed, but no in vivo effect …


Environmental Communication: Changing The Attitude-Behavioral Gap In Science Communication Utilizing Strategic Messaging, Carrie Helgeson Nelms Aug 2022

Environmental Communication: Changing The Attitude-Behavioral Gap In Science Communication Utilizing Strategic Messaging, Carrie Helgeson Nelms

Graduate Theses and Dissertations

National Polls in the United States consistently find the public’s beliefs and attitudes about climate change and other environmental issues significantly diverge from those held by the science community. A communication gap between the findings on the causes and effects of environmental issues and the public’s inability to interpret or refuse to accept these findings are possible causes of this divergence. This communication gap constitutes a threat to society because of inaction to environmental problems and points to needed changes in scientific messaging that better informs and motivates behavioral change. The present research employed a strategic message design to affect …


Church, Country, Culture: How Three Aspects Of Authoritarianism Predict Support For Donald Trump, Trenton Leslie Aug 2022

Church, Country, Culture: How Three Aspects Of Authoritarianism Predict Support For Donald Trump, Trenton Leslie

Graduate Theses and Dissertations

In the American bipartisan system, ideologies and beliefs create political views that sort voters between two groups. Political sorting increases polarization based on cultural preferences for an in-group that become ethnocentric views, which develop into ethnocentric cultural politics. I present an augmented concept of authoritarianism in America that encompasses sorting based on aspects of political belief, encapsulating sources of polarization and cultural attachments to political associations.

I develop the argument that authoritarianism is the result of political attachment to identities that feed off one another as individuals identify with an in-group, such as a party platform. My central theory is …


An Evaluation Of The Convergent Construct Validity Of The Boldness Inventory Of Psychopathy Using A Five-Minute, 10% Carbon-Dioxide-Enriched Air Challenge, Morgan Alexandra Hill Aug 2022

An Evaluation Of The Convergent Construct Validity Of The Boldness Inventory Of Psychopathy Using A Five-Minute, 10% Carbon-Dioxide-Enriched Air Challenge, Morgan Alexandra Hill

Graduate Theses and Dissertations

Psychopathy is a constellation of maladaptive interpersonal, affective, and behavioral features, including grandiosity, manipulativeness, emotional detachment, and impulsivity (Hare, 2003). Fearlessness, immunity to stress, self-assurance, and social dominance are considered to be adaptive features of psychopathy. Patrick and colleagues (2009) sought to reconcile differences between opposing conceptualizations of psychopathy by formulating a triarchic model of the condition. One core construct in this model, boldness, captures an ability to remain calm in the face of threat, an appetite for dangerous or risky activities, and an increased tolerance for uncertainty and danger. Boldness is believed to originate from differences in the brain’s …


Local Broadcast Reporters Maintaining Social Responsibility And Mental Health While Serving A Community Under Lockdown, Mary-Morgan Ellis Aug 2022

Local Broadcast Reporters Maintaining Social Responsibility And Mental Health While Serving A Community Under Lockdown, Mary-Morgan Ellis

Graduate Theses and Dissertations

This study looks at local broadcast news reporters working in Northwest Arkansas before, at the start, and during the COVID-19 global pandemic. Research for this study includes a content study of the tweets and Twitter accounts of eleven local reporters. This study considers the social responsibility theory and examines how these eleven local reporters use the theory in their everyday work. Research found, though these reporters don’t credit the theory by name, they are still putting its guidelines into effect as a sort of moral compass when creating objective and representative news for their communities. The research also found that …


The Effects Of Physical Function And Genetics On Cognition And Blood Biomarkers In Individuals At-Risk For Alzheimer’S Disease And Related Dementias, Joshua Louis Gills Aug 2022

The Effects Of Physical Function And Genetics On Cognition And Blood Biomarkers In Individuals At-Risk For Alzheimer’S Disease And Related Dementias, Joshua Louis Gills

Graduate Theses and Dissertations

Alzheimer’s disease and related dementia (ADRD) rates are expected to triple by the year 2050. Early detection and specific mitigation efforts are warranted to blunt the alarming rate. Physical function (PF) declines with age, but higher physical function is associated with better cognitive functioning in middle-to- older age individuals. Moreover, greater physical activity (PA) is associated with better global cognition; however, Apoliporotein e4 carriers may not gain the same benefits with exercise. Additionally, plasma phosphorylated tau 217 (p-tau217) has been identified as a novel diagnostic ADRD biomarker which needs further research to examine associations with risk factors. Therefore, the aims …


Intestinal Microbiota Analysis Of Broiler Chickens Under Necrotic Enteritis Challenge And Tributyrin Supplementation, Taylor Nicole Mckinney Aug 2022

Intestinal Microbiota Analysis Of Broiler Chickens Under Necrotic Enteritis Challenge And Tributyrin Supplementation, Taylor Nicole Mckinney

Graduate Theses and Dissertations

Poultry is a staple protein source for most of the planet. Until recently, antibiotic growth promoters (AGPs) were used to prevent illnesses in commercial chicken production. Currently, this is not possible due to regulations and consumer concern, but without such a preventative, diseases like necrotic enteritis (NE) have reemerged, posing a threat to bird health, and ultimately, our food source. Necrotic enteritis is a severe gastrointestinal disease caused by the gram-positive pathogen, Clostridium perfringens. Clinical features of this disease are diarrhea, intestinal lesions, and death, with a high transmission rate. In a subclinical form, growth performance is diminished and is …


Investigating Molecular Mechanisms Behind Bacterial Chondronecrosis With Osteomyelitis (Bco) Pathogenesis In Modern Broilers, Alison Ramser May 2022

Investigating Molecular Mechanisms Behind Bacterial Chondronecrosis With Osteomyelitis (Bco) Pathogenesis In Modern Broilers, Alison Ramser

Graduate Theses and Dissertations

Bacterial chondronecrosis with osteomyelitis (BCO), a leading cause of lameness in broiler chickens, is characterized by infection, inflammation, and bone attrition. There are currently no effective treatments and positive diagnosis is only possible through necropsy evaluations. Lameness is also a rising animal welfare and economic concern, making prevention and detection of BCO all the more critical. These challenges are exacerbated by a lack of mechanistic understanding of BCO’s etiology. The question I asked during my dissertation was how bacteria induce bone attrition in BCO pathology. My research has shown that mitochondrial dysfunction is characteristic of BCO conditions along with autophagy …


A Mixed Methods Approach To Context Specific Curriculum Design For Very Small And Small Strawberry Growers In The Southeastern United States, Thomas A. Yeargin May 2022

A Mixed Methods Approach To Context Specific Curriculum Design For Very Small And Small Strawberry Growers In The Southeastern United States, Thomas A. Yeargin

Graduate Theses and Dissertations

Outbreaks of foodborne illness due to fresh produce are a continued threat to both the publichealth and the economy in the United States. Though there are many factors which influence the perpetuation of foodborne pathogens, the inability of the food industry to curtail this issue indicates systemic failure of interventions aimed at improving food safety practices. In this dissertation, we detail the efforts made over the past few decades to provide training to food producers and food handlers as well as recommendations that have been made for improvement based on these studies. By borrowing from more advanced fields of study …


Six Feet Apart: Relational Turbulence Theory And Coping With Covid-19 Within Long-Distance Relationships, Mia Waymack May 2022

Six Feet Apart: Relational Turbulence Theory And Coping With Covid-19 Within Long-Distance Relationships, Mia Waymack

Graduate Theses and Dissertations

Among research that currently exists, no studies thus far combine elements of COVID-19, long-distance relationships, and Relational Turbulence Theory to explain how each of these elements impacts the others, if at all. Previous research does exist on each of these elements individually, although research regarding the long-term effects of COVID-19 on relationships is minimal considering the pandemic is ongoing. Long-distance relationships have been studied using Relational Turbulence Theory in previous studies within military relationships but have not been studied in connection with either COVID-19 or among college students. This study was conducted by way of qualitative, one-on-one interviews to determine …


The Lived Experiences Of Transmasculine Speakers: A Phenomenological Investigation Of Vocal Quality And Function In Relation To Gender, Micah Wylie May 2022

The Lived Experiences Of Transmasculine Speakers: A Phenomenological Investigation Of Vocal Quality And Function In Relation To Gender, Micah Wylie

Graduate Theses and Dissertations

The objective of this study was to learn how transmasculine individuals perceive the quality and function of their voices, and how those perceptions influence how they experience gender identity and communicate with others. This qualitative study adopted a hermeneutical phenomenological approach that involved using content analysis and thematic analysis to describe and interpret phenomena. This approach assumes that the researcher is not biased, but is a part of the world being studied and, therefore, understands the phenomenon by interpretive means. Saturation was achieved when all relevant information was introduced, and patterns of information had been identified. Sixteen interviews were conducted. …


Efficacy Of Multivitamin-Mineral Supplementation On Measures Of Anxiety, Depression, Self-Esteem, Dysregulation, And Perceived Stress In Young Adults, Courtney Gorden May 2022

Efficacy Of Multivitamin-Mineral Supplementation On Measures Of Anxiety, Depression, Self-Esteem, Dysregulation, And Perceived Stress In Young Adults, Courtney Gorden

Graduate Theses and Dissertations

Mental health in the United States is at an all-time low with 21% of adults 18+ suffering from depression or anxiety. When compared with other categories, emerging adults (18-25 years old) have the highest prevalence of mental health disorders at 30%. Young adults face an inordinate amount of stress given the COVID-19 pandemic, being in a unique developmental stage, experiencing new relationships, and transitioning from high school to their professional lives. Vitamins and minerals have roles in neurobiochemistry and have been investigated for effects on mental health with mixed results. Few studies factor in the unique emerging adult developmental stage …


Exploring Higher Weight Women's Experiences Of Provider Weight Stigma, Meredith W. Moore May 2022

Exploring Higher Weight Women's Experiences Of Provider Weight Stigma, Meredith W. Moore

Graduate Theses and Dissertations

The purpose of this phenomenological study is to explore the phenomena of weight stigma as experienced by higher weight women in mental health treatment who also engage in restrictive eating behaviors. Women in larger bodies who are emotionally or behaviorally restrictive in their eating behaviors face a unique set of challenges and barriers. These include challenges due the disordered eating behaviors themselves, along with barriers related to weight stigma perpetuated by the mental health providers treating them (Harrop, 2019). Distinct hurdles to proper treatment including delay of diagnosis, longer duration of symptoms, and increased distress related to eating and body …


Evaluation Of The Effect Of A Lippia Organoides Essential Oil Extract On Clostridium Perfringens Proliferation In Vitro And Necrotic Enteritis In Broiler Chickens, Makenly E. Coles May 2022

Evaluation Of The Effect Of A Lippia Organoides Essential Oil Extract On Clostridium Perfringens Proliferation In Vitro And Necrotic Enteritis In Broiler Chickens, Makenly E. Coles

Graduate Theses and Dissertations

The purpose of the present research was to assess the effects of essential oils derived from the plant Lippia organoides on performance parameters, intestinal integrity, and necrotic enteritis (NE) in broiler chickens. To do this, a previously established challenge model for NE was utilized which included challenging with Salmonella Typhimurium on day 0, Eimeria maxima on day 18, and Clostridium perfringens on days 22 and 23. Treatment groups included a 1) non-challenged, negative control, 2) challenged control, and 3) challenged, Lippia origanoides (37ppm in the diet). Group 1 (negative control) had significantly (P < 0.05) higher body weight gain from d8-25 and d0-25 compared to both challenged groups. Feed intake was significantly different for all three groups (P < 0.05) at 8-25 days and 0-25 days with group 1 having the highest feed intake for both time periods. Total mortality was greater in the positive control when compared to both the negative and treatment groups. NE lesion scores were significantly different between all groups with the positive control having the highest mean lesion scores and the negative control having a mean lesion score of 0. The positive control group had the highest FITC-d amounts detected in the sera, being statistically higher than both the treatment group and negative group which were both statistically different from each other. At the present inclusion rate for the essential oil (37 ppm), there was an overall reduction in the negative impact from the NE infection. Further studies should be conducted to reach more significant conclusions.


Examination Of The Colorful Semantic Approach Via Telepractice For Children Who Are Deaf Or Hard Of Hearing, Samadhi Pusuba Devayalage May 2022

Examination Of The Colorful Semantic Approach Via Telepractice For Children Who Are Deaf Or Hard Of Hearing, Samadhi Pusuba Devayalage

Graduate Theses and Dissertations

Introduction: Hearing loss, deafness or hard of hearing are considered to be the inabilityof perceiving sounds beyond 20 dB. Due to a direct impact of a hearing loss, a developing brain undergoes difficulties in acquiring age-appropriate syntax and speech sounds. As a result, children with hearing loss present language, speech, and literacy disabilities. The current study discusses the efficacy of the colorful semantics approach in order to see its impact on sentence structure development. Methodology: A single subject withdrawal experimental study conducted following ABAB model. Two participants (6 years and 10 years) were recruited to the study following an inclusion …


Hallucinogenic Neoshamanism As Antimodernism: Development And Ethical Considerations, Ethan Thompson May 2022

Hallucinogenic Neoshamanism As Antimodernism: Development And Ethical Considerations, Ethan Thompson

Graduate Theses and Dissertations

Humans have been using hallucinogenic plants and fungi for thousands of years. Historically, people around the world have made use of these substances to aid in their spiritual development. Studies of the usage of hallucinogens in indigenous societies often use the term “shamanism” to characterize the associated system of belief and ritual practices. In popular understanding, shamanism is a religious system that features highly ritualized performances in which a practitioner (shaman) utilizes an altered state of consciousness to gain access to realms inhabited by spirits with the intent of recruiting their help to resolve a problem, cure a patient, correct …


Implementing An Exercise Referral Scheme For Promoting Physical Activity In University Mental Health Care, Bryce Daniels May 2022

Implementing An Exercise Referral Scheme For Promoting Physical Activity In University Mental Health Care, Bryce Daniels

Graduate Theses and Dissertations

Introduction. Mental health symptoms and conditions are prevalent and increasing on college campuses with anxiety and depression having the highest increases in prevalence. Many college students are also physically inactive which is problematic as physical activity benefits mental health. Exercise referral schemes (ERS) can promote physical activity, though no studies have investigated the implementation of an ERS within a college counseling center. Purpose. The purpose of this dissertation was to investigate the implementation of an ERS for promoting physical activity in university mental health care. Methods. Study 1 used a qualitative descriptive design of 14 certified counselors to explore perceptions …


Examining The Effects Of Oral Contraceptive Use On Thermoregulation, Whitley C. Atkins May 2022

Examining The Effects Of Oral Contraceptive Use On Thermoregulation, Whitley C. Atkins

Graduate Theses and Dissertations

Purpose: The purpose of this investigation was to evaluate the effects of combined (estradiol and progestin) monophasic oral contraceptive pill (OCP) use on thermoregulation. Further, we sought to evaluate OCP use on acute rehydration post-exercise in the heat using recommended rehydration guidelines. Methods: Twelve healthy, aerobically trained (VO2peak = 47.8 ± 4.7 mL/kg/min), long term female oral contraceptive users completed a familiarization trial and two experimental days separated by ≥ 7 days. The two experimental trials were identical except for the hormone dosing phase. One trial was completed during the third week of active pill dosing (ACT) and one during …


The Impact Of Corporal Punishment For Timorese High School Graduates, Veronica Godinho Pereira Dec 2021

The Impact Of Corporal Punishment For Timorese High School Graduates, Veronica Godinho Pereira

Graduate Theses and Dissertations

This research examines the impacts of corporal punishment for Timorese high school graduates. Physical punishment is a pervasive method of disciplining students and children used in Timor-Leste because it has been such a tradition (UNICEF 2017). Few researchers have attempted to analyze the negative impacts of corporal punishment and possible gender differences; there is no known research on the impacts of corporal punishment in Timor-Leste. This study uses an in-depth interview method, where data were collected from 26 Timorese high school graduates composed of both men and women from both private and public schools in Timor-Leste. The ages of the …


Substance Use And Psychological Distress Correlates Of Sleep Quality Among College Students, Juanybeth Morales Ortega Dec 2021

Substance Use And Psychological Distress Correlates Of Sleep Quality Among College Students, Juanybeth Morales Ortega

Graduate Theses and Dissertations

Poor sleep quality in college students is a major problem associated with adverse health outcomes, cognitive performance, substance use, and psychological distress. Our study explored how substance use and psychological distress are associated with the sleep quality of college students. We analyzed secondary data collected in 2019 using a cross-sectional survey design. Measures included participants’ demographic characteristics, sleep quality using the Pittsburg Sleep Quality Index (PSQI), drug use, depression using the Patient Health Questionnaire-9 (PHQ-9), and suicidality. After excluding participants with missing information for sleep quality, a total of 555 students remained for the analysis. Our bivariate analysis found that …


Does Whispering Improve Children’S Memory? Comparing Auditory Vigilance And Salience Hypotheses, Christina M. Barnes Dec 2021

Does Whispering Improve Children’S Memory? Comparing Auditory Vigilance And Salience Hypotheses, Christina M. Barnes

Graduate Theses and Dissertations

Oral communication is one of the primary tools children use to learn new information and speech registers can deliver additional meaning to the words someone uses. Cirillo’s (2004) vigilance hypothesis states “Whispering can affect the psychobiological state of recipients, and in particular raise their auditory vigilance” (Cirillo, 2004, p. 76). Building on this theory, the current study investigates the role of whispering and children’s memory by examining a whispering vigilance, whispering salience which focused on the changes between normal and whisper registers, and combined vigilance and salience hypotheses to determine if whispering contributes to the recall of information. Using video …


News Media Trust And Mistrust During The Covid-19 Pandemic, Kaitlyn Seiter Dec 2021

News Media Trust And Mistrust During The Covid-19 Pandemic, Kaitlyn Seiter

Graduate Theses and Dissertations

With the uncertainty and growing information surrounding the COVID-19 pandemic, news media consumption has increased drastically compared to pre-pandemic consumption. At the start of the pandemic, 94% of Americans reported closely following COVID-19 news, with more than half of Americans spending more than two hours consuming COVID-19 news everyday (SSRS, 2020). With the news media serving as a critical source of information through this public health crisis, the public’s reactions, behaviors, and attitudes to the pandemic stem from the level of trust they have in the news media to share COVID-19 information. Because of this, this study examines trust in …


Evaluation Of Two Neonatal Challenge Models For Broiler Chickens And Their Effects On Early Performance Parameters, Callie Selby Dec 2021

Evaluation Of Two Neonatal Challenge Models For Broiler Chickens And Their Effects On Early Performance Parameters, Callie Selby

Graduate Theses and Dissertations

Formaldehyde fumigation in poultry hatch cabinets has been utilized for sanitation of hatching eggs for over a century. Formaldehyde is utilized to minimize pathogenic microbes on the surface of the egg as well as the microbial bloom during the hatching process. While formaldehyde is effective, its use is regulated in the United States and Europe due to its carcinogenic nature. Formaldehyde has been shown to damage the cuticle of the egg, cause embryonic death, and damage the epithelial lining of the respiratory tract of freshly hatched chicks, predisposing them for respiratory infection. Alternatives for formaldehyde fumigation must be identified and …


Stress Among Ncaa Division Ii Head Coaches, Dee Gerlach Dec 2021

Stress Among Ncaa Division Ii Head Coaches, Dee Gerlach

Graduate Theses and Dissertations

The purpose of this quantitative study was to identify factors that create stress among head coaches at the National Association Athletic Association Division II level. Data was collected through a demographic questionnaire and the Coaching Issues Survey (CIS), a tool used to measure specific factors that may create stress among coaches. The factors of the CIS include four subscales: Athlete-Concerns, Time-Role, Program-Success, and Win-Loss. Participants (N=416) consisted of head coaches representing the following sports: baseball, men’s basketball, women’s basketball, men’s golf, women’s golf, men’s and women’s golf, softball, women’s tennis, and men’s and women’s tennis. The independent variables for this …


Vulnerability To And Protection Against Covid-19 Fear, Threat, And Worry, Marsha Kim Huh Jul 2021

Vulnerability To And Protection Against Covid-19 Fear, Threat, And Worry, Marsha Kim Huh

Graduate Theses and Dissertations

Drawing from a sample of 10,368 adults living in the U.S., the current study examines the role of social and psychological resources in lowering COVID-related fear, threat, and worry, controlling for a number of social vulnerabilities (e.g. gender, race/ethnicity, and presence of children). The impact of social location, particularly in regards to race, and how one accesses and/or utilizes social and psychological resources is also examined through disaggregated regression models. Results demonstrate that some social and psychological resources impact COVID-specific distress (fear/threat/worry), but depending on the resource, relationships vary in direction and significance. The strength of social ties and mastery …


Directed Genome Evolution To Identify Genes For Macrophage Survival By Staphylococcus Agnetis, Sonali Lakshika Anne Lenaduwe Lokuge Jul 2021

Directed Genome Evolution To Identify Genes For Macrophage Survival By Staphylococcus Agnetis, Sonali Lakshika Anne Lenaduwe Lokuge

Graduate Theses and Dissertations

Bacterial Chondronecrosis with Osteomyelitis (BCO) is a debilitating infection that negatively impacts animal welfare and costs the broiler industry billions of dollars annually. We have previously isolated Staphylococcus agnetis 908 from BCO samples obtained from broilers at the University of Arkansas research farm. This isolate can induce BCO lameness at greater than 50% in broilers exposed to the pathogen in drinking water. We found that S. agnetis 908 is capable of surviving and escaping macrophages compared to a closely related cattle isolate,1379. Through Directed Genome Evolution (DGE) we identified that this difference is at least partially associated with an alanine …


Negative Urgency's Influence On State-Level, Emotion-Based Changes In Alcohol-Related Cognitions, Noah Wolkowicz Jul 2021

Negative Urgency's Influence On State-Level, Emotion-Based Changes In Alcohol-Related Cognitions, Noah Wolkowicz

Graduate Theses and Dissertations

This project expanded on the Acquired Preparedness Model of Risk (APMR) by examining how Negative Urgency (NU), the tendency to act rashly in negative emotional states, affects emotion-based changes in alcohol cognitions to produce risk for alcohol use. The APMR prioritizes the role of outcome expectancies as the means through which traits such as NU, convey alcohol use risk. However, this model treats these cognitions as static and often fails to assess their valence; further, alcohol-cognitions fluctuate in response to negative emotions and may become more salient during these states. Therefore, this study examined: 1) how NU impacts negative emotion-based, …