Digital Commons Network^™

Aggregatibacter Actinomycetemcomitans Exploits And Modulates The Immune Response By Human Neutrophils For Survival In The Anaerobic Environment., Hazel Ozuna

Electronic Theses and Dissertations

Aggregatibacter actinomycetemcomitans (Aa) is a Gram-negative facultative anaerobe and an opportunistic oral pathogen, strongly associated with localized periodontitis and other inflammatory diseases. Periodontitis is a chronic inflammation of the periodontium resulting from the inflammatory response of the host towards the dysbiotic microbial community present at the gingival crevice. The host immune response creates a hostile environment for microorganisms; therefore, it is important for Aa to be able to regulate the necessary genes to survive and thrive in such an environment. Aaexpresses several virulence factors such as a cytolethal distending toxin (Cdt), lipopolysaccharide (LPS) and leukotoxin A (LtxA), …

Genomic Tools And Models For Investigating The Role Of Germline Diversity In Mouse Antibody Repertoire Development., Justin T. Kos

Electronic Theses and Dissertations

Given the diversity and complexity within immunoglobulin (IG) loci, effective mouse models first require characterization of intra-strain differences and construction of high-quality reference assemblies for IG loci in several representative strains. To understand light chain germline diversity across biomedically significant mouse strains, we profiled the expressed IGK and IGL repertoires of 18 commonly used laboratory mouse strains using AIRR-seq. Across strains, we observed germline IGKV sequences shared by three different IGK haplotypes and a more conserved IGLV germline repertoire among common laboratory strains. Pacific Biosciences (PacBio) Single-Molecule Real-Time (SMRT) sequencing was used to sequence and assemble bacterial artificial chromosomes (BAC) …

Characterization Of Fundamental Parameters That Modulate Acoustofluidic-Mediated Molecular Delivery To Cells., Connor Sterling Centner

Electronic Theses and Dissertations

Cell-based therapies represent the latest biotechnological revolution in medicine, but significant limitations exist in non-viral intracellular delivery techniques during manufacturing of cell therapies. To address these limitations, a novel acoustofluidic device was developed to deliver ultrasound waves into a flow chamber for rapid molecular delivery to human cells. Our acoustofluidic device delivers biomolecules by inducing expansion and collapse of exogenous gas-filled microbubbles (“cavitation”), which enhances molecular delivery to nearby cells. Experimental studies were conducted to characterize key parameters that influence acoustofluidic-mediated molecular delivery to human cells. A clinical ultrasound transducer was generally utilized with varying cationic microbubble concentrations. Intracellular delivery …

"Death Can't Touch Them Now": Aids Response And Memorialization In Louisville, Kentucky, 1982-1992., Olivia A. Beutel

Electronic Theses and Dissertations

This thesis aims to address the role of the queer community in Louisville, Kentucky during the AIDS epidemic. Beginning with the first reported AIDS death in the city in 1983 throughout the 1980s, dialogue focused on those living with AIDS, specifically on education for prevention and aid to those afflicted by the disease. Individuals in the queer community—gay men, lesbians, bisexual men and women, transgender men and women, and others—created resources that were not being provided by the larger city government. Then, in the 1990s, national attention to the AIDS Memorial Quilt encouraged people to participate in rituals of commemoration, …

Meat The Future., Xin Chen

Electronic Theses and Dissertations

This research focuses on the subtle relationship between human life, the environment, and other animals that we live among every day. Under the mainstream social background of capitalism and a commodity economy, animals are the victims of constant consumption and exploitation. However, meat is a basic substance for human nourishment, especially in certain cultures. As a result, meat becomes an important part of the commodity economy in capitalist societies, wherein the supply must be filled to accommodate society’s demand. This research formed an exhibition using glass and ceramic artwork using a playfully satirical tone to offer a crucial alternative: how …

Fabrication And Characterization Of Lactobacillus Crispatus Containing Bioprints For Bacterial Vaginosis Application., Anthony J. Kyser

Electronic Theses and Dissertations

Bacterial vaginosis (BV) is a condition in which healthy lactobacilli are replaced by an overabundance of pathogenic bacteria in the female reproductive tract. Current antibiotic treatments often fail to “cure” infection, resulting in recurrence in more than 50% of women, 6 months post-treatment. Recently, probiotics have demonstrated promise to restore vaginal health; however, as with other active agents, delivery requires once-to-twice daily administration. Recently, three-dimensional (3D)-bioprinting has enabled the fabrication of well-defined cell-laden architectures with tunable agent release, thereby presenting a novel approach with which to deliver probiotics. One promising bioink, gelatin alginate, was selected for study, due to its …

Evaluating Eosinophilic Colitis As A Unique Disease Using Colonic Molecular Profiles: A Multi-Site Study, Tetsuo Shoda, Margaret H Collins, Mark Rochman, Ting Wen, Julie M Caldwell, Lydia E Mack, Garrett A Osswald, John A Besse, Yael Haberman, Seema S Aceves, Nicoleta C Arva, Kelley E Capocelli, Mirna Chehade, Carla M Davis, Evan S Dellon, Gary W Falk, Nirmala Gonsalves, Sandeep K Gupta, Ikuo Hirano, Paneez Khoury, Amy Klion, Calies Menard-Katcher, John Leung, Vincent A Mukkada, Philip E Putnam, Jonathan M Spergel, Joshua B Wechsler, Guang-Yu Yang, Glenn T Furuta, Lee A Denson, Marc E Rothenberg, Consortium Of Eosinophilic Gastrointestinal Diseases Researchers (Cegir)

Faculty, Staff and Students Publications

BACKGROUND & AIMS: Colonic eosinophilia, an enigmatic finding often referred to as eosinophilic colitis (EoC), is a poorly understood condition. Whether EoC is a distinct disease or a colonic manifestation of eosinophilic gastrointestinal diseases (EGIDs) or inflammatory bowel disease (IBD) is undetermined.

METHODS: Subjects with EoC (n = 27) and controls (normal [NL, n = 20], Crohn's disease [CD, n = 14]) were enrolled across sites associated with the Consortium of Eosinophilic Gastrointestinal Disease Researchers. EoC was diagnosed as colonic eosinophilia (ascending ≥100, descending ≥85, sigmoid ≥65 eosinophils/high-power field) with related symptoms. Colon biopsies were subjected to RNA sequencing. Associations …

Immune Complex-Mediated Glomerulonephritis Post Covid-19 Vaccination In A Patient With Concomitant Brucellosis, Saad Al Bakr, Mufaddal A. Alaithan

Saudi Medical Journal

COVID vaccinations have been an important step in controlling the COVID-19 pandemic. Despite the fact they were generally safe and effective, a few case reports of renal disorders have been published following COVID vaccines. We report a 29-year-old man with history of Chronic Kidney Disease who presented to our center with flank pain after receiving AstraZeneca COVID vaccine. He also had history of raw milk ingestion. His initial investigations showed high creatinine with high level of proteinuria. A renal biopsy was consistent with immune complex-mediated glomerulonephritis on top of renal fibrosis. His brucella serology also showed high titer. He was …

A Project On Why Many High School And College Students Fail To Attend Church Services, John Wachori Mburu

Doctoral Dissertations and Projects

The purpose of this research project is to establish why many of the high school and college students within the Light of Life Restoration Church in Kenya choose not to attend church services. Even after childhood training and church attendance since they were young, many students drop out of church. They get themselves involved in other activities and friends who eventually derail them to other attractions. This alarming trend has brought about the derailment from the Christian moral principles and values which have been the guiding principle of the nation. The derailment has caused lawlessness, unruliness, and all kinds of …

Are Ems Prepared To Respond To A Pandemic Or Bioterrorist Attack?, Douglas Howard Schneider

Doctoral Dissertations and Projects

The 2019 Coronavirus (COVID-19) pandemic increased America’s awareness of the amount of death and damage to the economy that pandemics and bioterrorism can cause. Additionally, the COVID-19 pandemic exposed significant shortfalls in national preparedness for a pandemic or bioterrorism event. The purpose of this study is to evaluate the current preparedness level of Emergency Medical Services (EMS) personnel in the United States to prepare for, respond to, mitigate, and recover from a natural or manufactured pandemic across the United States. The significance of this study is an accurate picture of preparedness for pandemic and bioterrorism events by American EMS systems. …

Just-In-Time/Just-In-Case Inventory Management As An Influence On Supply Chain Disruption In Medical Systems Based In The Southeastern United States During The Covid-19 Pandemic, Brooke Gibson Coslett

Doctoral Dissertations and Projects

The purpose of this quantitative study was to gain a deeper understanding on the impact that the COVID-19 pandemic had on the global supply chain, particularly in the southeastern region of the United States. The study involved a population comprised of professionals employed in medical systems who possessed a working knowledge of supply chain management. The researcher distributed online surveys via an online survey platform to a list of medical systems professionals in both the public and private sectors. The sample size was 396 professionals, and the number of respondents was 201, once the prospective research participants were properly vetted. …

Genetic Characterization Of A Klebsiella Pneumoniae Secreted Anti-Microbial Protein, Ethan Becker

Undergraduate Honors Theses

Antimicrobial-resistant bacteria are a major source of ailment in modern-day nosocomial settings, with numerous risks including leading to possible further drug resistance or spreading to those who cannot fight off the infection due to immune suppression or dysfunction. Previous work in our laboratory has determined that Klebsiella pneumoniae possesses inhibitory effects on the growth of a variety of bacteria that contain antimicrobial-resistant properties in the Enterobacteriaceae family, a major source of nosocomial antimicrobial-resistance. This novel property of K. pneumoniae inhibits the growth of Citrobacter freundii, Enterobacter aerogenes, and Enterobacter cloacae through an anti-microbial protein. The antimicrobial protein secreted from K. …

Covid-19 In Tennessee: Lessons Learned And A Tool For The Future, Allen Archer, Randy Wykoff, Megan Quinn

Undergraduate Honors Theses

Background: In late 2019, the SARS-CoV-2 virus was identified in Wuhan, China. Within a matter of weeks, the virus spread to the United States and many other countries around the world. By March 5, 2020, the first case of COVID-19 (the disease caused by the SARS-CoV-2 virus) was identified in the state of Tennessee, and the first known COVID-19 associated death in the state followed on March 20, 2020. In 2020 alone, there were 514,922 confirmed cases and 6,760 COVID-19 attributed deaths in the state of Tennessee. It is important to understand, however, that confirmed COVID-19 deaths do not accurately …

Unmet Legal Needs As Health Injustice, Yael Cannon

Georgetown Law Faculty Publications and Other Works

In a seminal report in 2006, the American Bar Association recognized that millions of low-income Americans have civil legal issues that go unaddressed, jeopardizing their fundamental and basic human needs for shelter, sustenance, safety, family stability, and access to health care. The pandemic has only exacerbated this crisis. When rights in these areas go unenforced for Americans marginalized by poverty and race, their health can suffer, compounding health inequities. The fundamental civil legal needs of low-income Americans must be addressed in order to ensure health equity. This Article argues that unmet fundamental legal needs serve as determinants of health and …

Frequency Of Multiple Sclerosis As A Function Of Handedness, Melissa Villafana

Theses, Dissertations and Culminating Projects

Background: Previous studies have examined the association between handedness and various autoimmune disorders. There is a possible link between handedness and immune system response due to high levels of testosterone in-utero which has been theorized to affect cerebral and immune system developments. To our knowledge, only two studies have examined the relationship between Multiple Sclerosis (MS) and handedness. Both studies used different measures of handedness and therefore, had contrasting results. In the current study, we suggest the need for a more appropriate way to measure handedness. Objective: This study investigates the relationship between MS type and Handedness. Methods: Participants with …

Equal Protection And Scarce Therapies: The Role Of Race, Sex, And Other Protected Classifications, Govind Persad

SMU Law Review Forum

The allocation of scarce medical treatments, such as antivirals and antibody therapies for COVID-19 patients, has important legal dimensions. This Essay examines a currently debated issue: how will courts view the consideration of characteristics shielded by equal protection law, such as race, sex, age, health, and even vaccination status, in allocation? Part II explains the application of strict scrutiny to allocation criteria that consider individual race, which have been recently debated, and concludes that such criteria are unlikely to succeed under present Supreme Court precedent. Part III analyzes the use of sex-based therapy allocation criteria, which are also in current …

Diffusive Dynamics Of Biological Macromolecules In The Cytoplasm Of Live Bacteria, Asmaa Ali Sadoon

Graduate Theses and Dissertations

Bacteria are small organisms that play important roles in our bodies and in maintaining our surrounding environment. However, bacterial infections are considered as one of the health diseases that threatens the lives of humans. Resistance of bacteria to antibiotics has made treating bacterial infections more challenging. With the emergence of many developed optical techniques, it has become possible to study various biological mechanisms of molecules inside these small organisms with high resolution and precise localization. In this research, single particle tracking photoactivation localization microscopy (sptPALM) technique was used to investigate the dynamics of fluorescent histonelike nucleoid-structuring proteins (H-NS) in live …

Diffusive Dynamics Of Biological Macromolecules In The Cytoplasm Of Live Bacteria, Asmaa Sadoon

Graduate Theses and Dissertations

Bacteria are small organisms that play important roles in our bodies and in maintaining our surrounding environment. However, bacterial infections are considered as one of the health diseases that threatens the lives of humans. Resistance of bacteria to antibiotics has made treating bacterial infections more challenging. With the emergence of many developed optical techniques, it has become possible to study various biological mechanisms of molecules inside these small organisms with high resolution and precise localization. In this research, single particle tracking photoactivation localization microscopy (sptPALM) technique was used to investigate the dynamics of fluorescent histonelike nucleoid-structuring proteins (H-NS) in live …

To The Window, To The Wall: Improving Environmental Monitoring Protocols, Sarah Jones

Graduate Theses and Dissertations

Detecting microorganisms on environmental surfaces via an environmental monitoring (EM) program is part of a preventive food safety culture. Environmental monitoring should 1) verify that food safety plans are reducing cross-contamination risk from surfaces to food, 2) pinpoint microbial niches, and 3) prevent the transmission of pathogens. Environmental monitoring programs utilize EM tools, such as sponges, to sample food contact and non-food contact surfaces. However, EM tool selection is determined by the individual food firm. This dissertation evaluated and characterized factors influencing EM program effectiveness in the food industry. Specifically, this dissertation focuses on the release of microorganisms from EM …

Optimizing Virus Prefiltration For Biopharmaceutical Manufacturing, Solomon Isu

Graduate Theses and Dissertations

Virus filters are single-use devices that use a size-based separation process. In virus filters, contaminating virus particles are retained while the therapeutic molecules pass through the membrane pores. Virus filters are an essential component of the overall virus clearance strategy. Sections 1 and 2 of this dissertation provide an introduction and extensive review of monoclonal antibody (mAb) process development, where virus filtration is pivotal. In section 3, prefiltration studies were performed with an industrially relevant IgG1 type mAb using adsorptive and size-exclusion-based prefilters with different mechanisms of action. This mAb has an isoelectric point range of 7.1 to 8.0 and …

Hepatitis C Screening, Confirmation, And Referral Improvement Project, Maria E. Mcmahon

Doctor of Nursing Practice Scholarly Projects

Hepatitis C is an illness caused by the blood-borne Hepatitis C virus (HCV), and usually becomes a chronic condition. Left untreated, HCV can lead to severe liver disease and liver failure. Newer treatments are effective and well tolerated, but most people with chronic HCV are not accessing treatment due to several factors that will be discussed. The primary objectives of this quality improvement project were to improve the treatment cascade, provide education to providers and patients, and facilitate screening, virus confirmation, and referral to treatment, in a Federally Qualified Health Center.

Implications Of Metal Coordination In Damage And Recognition Of Nucleic Acids And Lipid Bilayers, Ana Dreab

Chemistry & Biochemistry Theses & Dissertations

Metal ions have a myriad of biological functions from structural stability to enzymatic (de)activation and metabolic electron transfer. Redox-active metals also mediate the formation of reactive oxygen species which may either cause oxidative damage or protect cellular components. Computational modeling is used here to investigate the role of (1) metal-ion binding to antimicrobial peptides, (2) metal-ion removal and disulfide formation on zinc finger (ZF) proteins, and (3) coordination of thiones/selones for the prevention of metal-mediated redox damage.

Piscidins, natural-occurring antimicrobial peptides, efficiently kill bacteria by targeting their membranes. Their efficacy is enhanced in vitro by metal-binding and the presence of …

How Do I Implement An Outpatient Program For The Administration Of Convalescent Plasma For Covid-19, Evan M. Bloch, Aaron A R Tobian, Shmuel Shoham, Daniel F. Hanley, Thomas J. Gniadek, Edward R. Cachay, Barry R. Meisenberg, Kimberly Kafka, Christi Marshall, Sonya L. Heath, Aarthi Shenoy, James H. Paxton, Adam Levine, Donald Forthal, Yuriko Fukuta, Moises A. Huaman, Alyssa Ziman, Jill Adamski, Jonathan Gerber, Daniel Cruser, Seble G. Kassaye, Giselle S. Mosnaim, Bela Patel, Ryan A. Metcalf, Shweta Anjan, Ronald B. Reisler, Anusha Yarava, Karen Lane, Nichol Mcbee, Amy Gawad, Jay S. Raval, Martin Zand, Matthew Abinante, Patrick B. Broderick, Arturo Casadevall, David Sullivan, Kelly A. Gebo

Pathology Research and Scholarship

Convalescent plasma, collected from donors who have recovered from a pathogen of interest, has been used to treat infectious diseases, particularly in times of outbreak, when alternative therapies were unavailable. The COVID-19 pandemic revived interest in the use of convalescent plasma. Large observational studies and clinical trials that were executed during the pandemic provided insight into how to use convalescent plasma, whereby high levels of antibodies against the pathogen of interest and administration early within the time course of the disease are critical for optimal therapeutic effect. Several studies have shown outpatient administration of COVID-19 convalescent plasma (CCP) to be …

Molecular Pathology Education: A Suggested Framework For Primary Care Resident Training In Genomic Medicine: A Report Of The Association For Molecular Pathology Training And Education Committee, Maria E. Arcila, Anthony N. Snow, Yassmine M N Akkari, Devon Chabot-Richards, Preeti Pancholi, Laura J. Tafe

Pathology Research and Scholarship

Developments in genomics are profoundly influencing medical practice. With increasing use of genetic and genomic testing across every aspect of the health care continuum, patients and their families are increasingly turning to primary care physicians (PCPs) for discussion and advice regarding tests, implications, and results. Yet, with the rapid growth of information, technology, and applications, PCPs are finding it challenging to fill the gaps in knowledge and support the growing needs of their patients. A critical component in expanding PCP genomic literacy lies in the education of physicians in training and in practice. Although a framework for developing physician competencies …

Targeting Neuronal Nitric Oxide Synthase (Nnos) For Melanoma Treatment, Shirley Tong

Pharmaceutical Sciences (PhD) Dissertations

Human cutaneous melanoma is the most aggressive form of skin cancer and the incidence rates have continued to increase over the years. Neuronal nitric oxide synthase (nNOS) produces nitric oxide (NO) has been found to be overexpressed in human melanoma and the expression of nNOS is induced by interferon-gamma (IFN-γ). In our studies, nNOS has been implicated in IFN-γ-stimulated melanoma progression and the inhibition of nNOS using novel inhibitors effectively inhibited IFN-γ-stimulated tumor growth in a xenograft mouse model. Programmed death-ligand 1 (PD-L1) is overexpressed in melanoma and plays an important role in suppressing the immune system ^12-14. Our …

Relative Palatability And Efficacy Of Brodifacoum-25d Conservation Rodenticide Pellets For Mouse Eradication On Midway Atoll, Peter J. Kappes, Shane R. Siers, Israel L. Leinbach, Robert T. Sugihara, Wesley J. Jolley, Jonathan H. Plissner, Elizabeth N. Flint, Kelly L. Goodale, Gregg R. Howald

United States Department of Agriculture Wildlife Services: Staff Publications

Invasive mice (Mus spp.) can negatively impact island species and ecosystems. Because fewer island rodent eradications have been attempted for mice compared to rats (Rattus spp.), less is known about efficacy and palatability of rodenticide baits for mouse eradications. We performed a series of bait acceptance and efficacy cage trials using a standard formulation of brodifacoum-based rodenticide on wild-caught mice from Sand Island, Midway Atoll, to help inform a proposed eradication there. Mice were offered ad libitum brodifacoum pellets along with various alternative food sources, and a “no choice” treatment group received only bait pellets. Mortality in the no choice …

Intercontinental Movement Of Highly Pathogenic Avian Influenza A(H5n1) Clade 2.3.4.4 Virus To The United States, 2021, Sarah N. Bevins, Susan A. Shriner, James C. Cumbee Jr., Krista E. Dilione, Kelly E. Douglass, Jeremy W. Ellis, Mary Lea Killian, Mia K. Torchetti, Julianna B. Lenoch

United States Department of Agriculture Wildlife Services: Staff Publications

We detected Eurasian-origin highly pathogenic avian influenza A(H5N1) virus belonging to the Gs/GD lineage, clade 2.3.4.4b, in wild waterfowl in 2 Atlantic coastal states in the United States. Bird banding data showed widespread movement of waterfowl within the Atlantic Flyway and between neighboring flyways and northern breeding grounds.

The Influence Of Violence, Policing, And Substance Use Stigma On Sexual And Substance Use Risk Engagement In Substance Using Men Along The U.S.-Mexico Border, William Campillo Terrazas

Open Access Theses & Dissertations

Background: Cities along the U.S.-Mexico border are unique environments where structural level variables place residents at risk for increased substance use subsequently impacting HIV rates and acquisition. Growing evidence emphasizes the importance of understanding how structural drivers of infectious diseases impact community and social networks to develop interventions to reduce HIV transmission among hard-to-reach populations.

Aims and Objectives: The goal of this study was to investigate the influence of structural factors such as neighborhood disruption, harsh policing, and substance use stigma on engagement of HIV risk behaviors among social networks of people who use drugs and who reside in El …

The Experience Of Immigration And Aging On The Health Of Older Adults In The El Paso, Texas, Border Region, Sonia Lizet Ramos

Open Access Theses & Dissertations

Healthcare access continues to be a problem for immigrant populations in the United States, especially for Latino immigrants at the US-Mexico border. There is limited social research examining the experience of access to health care of older adult Latino immigrants during their life course in the U.S. In U.S.-Mexico border communities, documented and undocumented residents face unique experiences when accessing health care. This thesis focuses on understanding the intersectionality of the immigration process and health care access of older adult Latino immigrants on the U.S.- Mexico. Using qualitative data collected from participants living in the County of El Paso, Texas, …

Understanding Public Emergency Preparedness Before And During The Coronavirus Outbreak: Implications For Effective Public Health And Risk Communication., Raphael Adjetey Fumey

Electronic Theses and Dissertations

The COVID-19 pandemic has resulted in a dramatic loss of human lives globally and presents an unprecedented challenge to public health, the world of work, and our food systems. The social and economic disruption caused by the COVID-19 pandemic is devastating, putting several millions of people at risk of falling into extreme poverty, with over 500 million people being undernourished. It is evident from the data on COVID-19 cases, deaths, and hospitalizations that the United States is the worse hit country, which can be attributed to the lack of preparedness at the individual, environmental, and government levels. This study applied …