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A Hermeneutic Phenomenological Study Of First-Year Christian Student Success In Theological Studies During The Pandemic, Philip Lamar Nash

Doctoral Dissertations and Projects

This study examined the journeys of first-year undergraduate theological students during the coronavirus (COVID-19) pandemic to figure out what, if anything, aided the students in completing their coursework with passing grades. COVID-19 has impacted organizations and individuals around the world, prompting changes to ensure that things kept moving forward safely. The research was conducted to discover what, if anything, brought about achievement for students in a COVID-19 collegiate environment. The research was guided through a hermeneutic phenomenological qualitative approach by conducting interviews with students about their first year in a residential secondary educational setting that moved to being online because …

Emotional Response In Working Memory Of Individuals With Latent Toxoplasmosis, Antonella Quimbayo

All HCAS Student Capstones, Theses, and Dissertations

Toxoplasma gondii is a prevalent parasite that infects about 30% of the world population. House cats and other felids serve as definitive hosts and acquire Toxoplasma by consuming infected prey, which are intermediate hosts. This includes rats and avians, but also large mammals such as wolves and deer. Toxoplasma gondii is known to manipulate prey behavior to enhance its transmission. For example, infected rodents demonstrates attraction to and curiosity around cat urine. Wolves infected with Toxoplasma were 11 times more likely to disperse from their pack and start a new pack. The manipulation of intermediate host behavior observed in rodents …

Inactivated Rabies-Based Lassa Fever Virus Vaccine Candidate Lassarab Protects Nonhuman Primates From Lethal Disease, Gabrielle Scher, Catherine Yankowski, Drishya Kurup, Nicole Josleyn, Eric Wilkinson, Jay Wells, Jesse Steffens, Ginger Lynn, Sean Vantongeren, Xiankun Zeng, Nancy Twenhafel, Kathleen Cashman, Matthias Schnell

Department of Microbiology and Immunology Faculty Papers

Lassa fever virus (LASV), a member of the Arenavirus family, is the etiological agent of Lassa fever, a severe hemorrhagic disease that causes considerable morbidity and mortality in the endemic areas of West Africa. LASV is a rodent-borne CDC Tier One biological threat agent and is on the World Health Organization's (WHO) Priority Pathogen list. Currently, no FDA-licensed vaccines or specific therapeutics are available. Here, we describe the efficacy of a deactivated rabies virus (RABV)-based vaccine encoding the glycoprotein precursor (GPC) of LASV (LASSARAB). Nonhuman primates (NHPs) were administered a two-dose regimen of LASSARAB or an irrelevant RABV-based vaccine to …

Central Nervous System Antiviral Pharmacology, Sean N. Avedissian

Theses & Dissertations

Soon after viral infection, viruses like Human Immunodeficiency Virus (HIV) and SARS-CoV-2 can disseminate throughout the body and establish reservoirs in the central nervous system (CNS). The persistence of viruses in cells of these reservoirs is a major obstacle to virus eradication. This is due to the abundance of cells/receptors that these viruses utilize to gain entry into cells found at these various reservoir sites. Consequently, these same anatomical sites also may be pharmacologic sanctuaries, as evidenced by concentrations of antiretroviral drugs (ARVs) and antivirals (AVs) that are lower in reservoirs than those in peripheral blood; in some cases, these …

Respiratory Syncytial Virus In The United States: A Research Proposal For A Prospective Cohort Study Of Rsv Vaccines, Kenneth D. Chiu

Master's Projects and Capstones

Objective

This paper proposes a phase IV study to estimate the effectiveness of Abryvso and Arexvy in older adults against severe RSV disease. Additionally, the study aims to assess factors involved with low vaccine uptake for these RSV vaccines.

Methods

For the background literature review of this proposal, I conducted a search of the PubMed and CINAHL Ultimate databases for articles on older adults and RSV. I filtered out results within the period of 2020 to 2024 that were publicly available and focused on RSV burden, vaccinations, or knowledge in the United States.

The proposed phased IV study is a …

Dying Right: Supporting Anti-Cancer Therapy Through Immunogenic Cell Death, Elizabeth Schmitz

Theses & Dissertations

The primary goal of most anti-cancer therapy is to eradicate neoplastic cells. Simultaneously, neoplastic cell death is the first step of the cancer-immunity cycle, which starts with the release of antigens from cancer cells and ends with T-cell directed killing of cancer cells, in addition to long-standing memory to tumor antigens encountered. Immunogenic damage-associated-molecular patterns (DAMPs) are endogenous cell molecules repurposed in times of insurmountable cell stress (e.g., CALR, ATP, HMGB1) to facilitate communication between dying cells and adaptive immune cells, acting as adjuvants for the cancer-immunity cycle, in a cellular fate termed immunogenic cell death (ICD). It …

Telehealth For Healthy Aging: A Multi-Level, Multi-Methods Approach, Vaibhavi Mone

Theses & Dissertations

Telehealth, rapidly adopted during the pandemic, has shown its usefulness and limitations, yet was not designed with older adults in mind. This dissertation encompasses three interconnected studies exploring telehealth utilization for Medicare Annual Wellness Visits (AWVs) among older adults, provider perspectives on telehealth AWVs, and the impact of teleconferencing on primary care providers' knowledge and confidence in geriatric care. The objectives are to determine patient characteristics using telehealth AWV (study 1), understand provider perspectives on telehealth AWV (study 2), and evaluate the effectiveness of geriatrics education through telehealth (study 3). Study 1 investigates the changes in AWV utilization among 18,405 …

Understanding The Role Of Malondialdehyde-Acetaldehyde Adducts (Maa) In Inflammatory Bowel Disease, Megan L. Otte

Theses & Dissertations

Inflammatory Bowel Disease (IBD) comprises autoimmune diseases of the gastrointestinal tract that greatly reduce the quality of life of patients and currently afflict up to 200 individuals per 100,000 Americans. Ulcerative colitis (UC) and Crohn’s Disease (CD), the two principal diseases comprising IBD, share symptoms and risk factors, however, precise etiology remains unclear. The diagnostics and clinical management of IBD have progressed greatly in recent years especially due to immune modulating therapies and biologics, however, IBD and its specific forms are still difficult to diagnose and cannot be cured with current treatments. The overarching mechanisms of IBD pathogenesis are known …

The Dissemination And Implementation Of N95 Fit Testing Capacities For Nebraska Long-Term Care Facilities: A Mixed-Methods Analysis Using The Re-Aim Framework, Anthony Blake

Theses & Dissertations

Background: Ensuring the proper fit of N95 respirators used by healthcare workers in long-term care facilities (LTCF) is essential for their safety. The Nebraska Department of Health and Human Services launched a LTCF strike team project (STP) in the summer of 2022, focused on increasing the number of staff trained in infection control and building internal capacity for LTCFs to fit test their employees. This study describes the N95 fit-testing initiative for Nebraska LTCFs.

Methods: Staff from all 19 local health departments (LHD) received “train-the-trainer” training to prepare LTCF staff to perform qualitative fit testing. LTCF administrators were requested to …

Experiences With Therapeutic Adherence Among Hiv Positive Older Adults In Puerto Rico, Isaida Cabrera-Montero

Walden Dissertations and Doctoral Studies

HIV/AIDS infection, which originally was a fatal disease, is now a treatable, chronic disease with which people can live to reach 70 years of age or older if they comply with treatment. HIV treatment requires adherence to medications, but there is a lack of evidence on therapeutic adherence among older adults in Puerto Rico. The purpose of this descriptive phenomenology study, guided by the health belief model, was to provide a better understanding of HIV therapy adherence among older adults living in Puerto Rico. Semi structured interviews were conducted with 10 HIV-positive adults aged 65 years or older who were …

The Impact Of Social Media Use On Maternal Vaccination Decisions, Natalie Raquel Flynn

Doctoral Dissertations and Projects

This quantitative study aimed to explore the impact of social networking sites (SNS) on maternal vaccination decisions. Utilizing purposive sampling, the study ensured a representative sample of mothers or expectant mothers over 18 years old, with at least one child under 18, residing in the United States. Participants completed a composite survey consisting of three individual surveys assessing social media usage, vaccination decisions, and information-seeking behaviors. Descriptive statistics were employed for comprehensive analysis, investigating the influence of accessing social media platforms on maternal COVID-19 vaccination decisions. The Shapiro-Wilk test assessed the normality of age, while frequencies, percentages, median, and interquartile …

Characterization Of Population Pharmacokinetics And Associated Interindividual Variability Of Drugs Used In Mass Drug Administration Against Lymphatic Filariasis, Abdullah Alshehri

Theses & Dissertations

Lymphatic filariasis (LF) is a mosquito-borne filarial infection that affects the lymphatic system. The progression of the disease is associated with severe comorbidities and social stigma among patients. The World Health Organization has categorized the disease as a public health problem, and it has been targeted by mass drug administration (MDA) campaigns over the past two decades. Several preventive chemotherapies have been used in MDA campaigns against LF, including a combination of three anti-filarial drugs (IDA therapy): albendazole (ALB), diethylcarbamazine (DEC), and ivermectin (IVM). Other antiparasitic drugs, such as moxidectin (MOX), are still under investigation for their activity against LF. …

The Experience Of Middle School Special Education Teachers In New Jersey Teaching Virtually During Covid-19, Yolanda Henderson

Doctoral Dissertations and Projects

The purpose of this transcendental phenomenological study is to describe the experiences of middle school special education teachers working remotely in New Jersey during the COVID-19 pandemic. The conceptual framework that guided this study was Schlossberg’s Transition Theory. Schlossberg's Transition Theory refers to events that result in a change of relationships, routines, assumptions, or roles. This theory allowed me to see the various phases such as moving in, through, and out of the COVID-19 pandemic. Recognizing how the pandemic affected the relationships, routines, and roles of teachers made it easy to understand how this theory related directly to the pandemic. …

The Transition From In Person Sessions To Telemental Health Sessions For College Counseling Center Counselors, Katherine L. Karimian

Doctoral Dissertations

This study was conducted by applying Interpretative Phenomenological Analysis (IPA) to explore the lived experiences of college counseling center (CCC) counselors during their rapid switch from in person to online services as a result of university and colleges moving to remote education during the peak of the COVID-19 pandemic (~March 2020 - August 2021). Six participants from different regions of the United States were interviewed via Zoom and analyzed through IPA. There were five themes that emerged:Blurred work/home boundaries, interpersonal relationships within work setting, adapting to teletherapy, impact of teletherapy on services, and preferring remote work. Emergent subthemes were parenting, …

3d Chromatin Architecture, Brd4, And Mediator Have Distinct Roles In Regulating Genome-Wide Transcriptional Bursting And Gene Network, Pawel Trzaskoma, Seolkyoung Jung, Aleksandra Pękowska, Christopher H Bohrer, Xiang Wang, Faiza Naz, Stefania Dell'orso, Wendy D Dubois, Ana Olivera, Supriya V Vartak, Yongbing Zhao, Subhashree Nayak, Andrew Overmiller, Maria I Morasso, Vittorio Sartorelli, Daniel R Larson, Carson C Chow, Rafael Casellas, John J O'Shea

Faculty, Staff and Student Publications

Discontinuous transcription is evolutionarily conserved and a fundamental feature of gene regulation; yet, the exact mechanisms underlying transcriptional bursting are unresolved. Analyses of bursting transcriptome-wide have focused on the role of cis-regulatory elements, but other factors that regulate this process remain elusive. We applied mathematical modeling to single-cell RNA sequencing data to infer bursting dynamics transcriptome-wide under multiple conditions to identify possible molecular mechanisms. We found that Mediator complex subunit 26 (MED26) primarily regulates frequency, MYC regulates burst size, while cohesin and Bromodomain-containing protein 4 (BRD4) can modulate both. Despite comparable effects on RNA levels among these perturbations, acute depletion …

Put The Vanc Down, Flip It And Reverse It: Comparison Of Vancomycin And Daptomycin Health Care Utilization And Cost In Outpatient Parenteral Antimicrobial Therapy, Amber C. Streifel, Katie Luis, Monark Nakrani, Diana Yu, Monica K. Sikka, Cara D. Varley, Alyse Douglass, Heather Mayer, Kathleen Young, James S. Lewis Ii

OHSU-PSU School of Public Health Faculty Publications and Presentations

Vancomycin and daptomycin are frequently used in outpatient parenteral antimicrobial therapy (OPAT). We analyze health care utilization and cost to the health care system for vancomycin vs daptomycin in the outpatient setting and find that vancomycin results in significantly higher health care utilization and similar cost per course compared with daptomycin in OPAT.

Differences In Stress Among Healthcare Workers In Rural And Urban Healthcare Settings--The Role Of Spirituality, Lisa Yancey

Doctoral Dissertations and Projects

In recent years, stress has become an unspoken epidemic that has affected many working adults. Many adults spend much of their waking hours working, contributing to their stress. This quantitative study examined the relationship between spirituality and stress among rural and urban healthcare workers. The data for this study was collected through social media platforms, email, and word of mouth. An online survey consisting of ten demographic questions, twenty questions from the Spiritual Well-Being Scale, and ten questions from the Perceived Stress Scale was administered to healthcare workers at least 18 years old through an anonymous survey. Pearson correlations were …

Waste Management Process And Malaria-Induced Child Mortality In Côte D’Ivoire., Kouame N'Guessan

Walden Dissertations and Doctoral Studies

Malaria-induced child mortality is a Sub-Saharan African phenomenon, and Côte d'Ivoire, in West Africa, has one of the highest rates. This general qualitative study investigates waste management as a potential factor of malaria-induced child mortality to inform policy changes and fill a gap in the body of knowledge. The study is grounded in Skocpol's policy feedback theoretical framework. The research question explored aspects of waste management in Côte d'Ivoire which contribute to the high rate of malaria-induced child mortality. Eighteen participants, equally divided into three groups, were purposely recruited via email and WhatsApp messages for semi-structured interviews using a smartphone …

Cellular And Molecular Basis Of Cd4+ T Cell Help At The Effector Phase During Immunotherapy Of Mhc-Ii Negative Tumors, Samuel Oche Ameh

Arts & Sciences Graduate Student Theses and Dissertations

Immune checkpoint therapies (ICT) have shown promise in treating solid tumors, providing cures and durable protection in some cases. However, only a subset of patients benefits from ICT, indicating a need for a deeper understanding of the requirements for successful therapy. In both mice and humans, αβ T cells are key mediators of spontaneous and ICT-induced anti-tumor responses. While the anti-tumor roles of CD8+ T cells are well-studied, the role of CD4+ T cells, particularly in ICT for MHC-II negative tumors, is less understood. New insights into how CD4+ T cells modulate CD8+ T cells during ICT may lead to …

Cefiderocol Heteroresistance Associated With Mutations In Tonb-Dependent Receptor Genes In Pseudomonas Aeruginosa Of Clinical Origin, Stephanie L Egge, Samie A Rizvi, Shelby R Simar, Manuel Alcalde, Jose R W Martinez, Blake M Hanson, An Q Dinh, Rodrigo P Baptista, Truc T Tran, Samuel A Shelburne, Jose M Munita, Cesar A Arias, Morgan Hakki, William R Miller

Faculty, Staff and Student Publications

The siderophore-cephalosporin cefiderocol (FDC) presents a promising treatment option for carbapenem-resistant (CR) P. aeruginosa (PA). FDC circumvents traditional porin and efflux-mediated resistance by utilizing TonB-dependent receptors (TBDRs) to access the periplasmic space. Emerging FDC resistance has been associated with loss of function mutations within TBDR genes or the regulatory genes controlling TBDR expression. Further, difficulties with antimicrobial susceptibility testing (AST) and unexpected negative clinical treatment outcomes have prompted concerns for heteroresistance, where a single lineage isolate contains resistant subpopulations not detectable by standard AST. This study aimed to evaluate the prevalence of TBDR mutations among clinical isolates of P. aeruginosa …

Partnering Across Professions: Public Health And Collaborative Courts Partnership To Increase Recovery Capital, Mikayla Aubry

Master's Projects and Capstones

Substance use disorder (SUD) has been steadily increasing over the past decade. The prevalence of SUD in the United States hit an all-time high of 48.7 million people struggling with SUD in 2022 (Tomko et al., 2022; United States (U.S.), 2023). State and federal policies have led to the criminalization of drug use, the dismantling of behavioral health systems, and mass incarceration of people with SUD. These policies have also created a cyclical cycle of failure and recidivism for people struggling with SUD. One intervention that has strived to rectify the mass incarceration of those struggling with SUD is the …

Effects Of Misinformation And Disinformation On Vaccine Hesitancy And Routine Vaccine Uptake, Cindy Chen

Master's Projects and Capstones

This literature review was conducted to identify the role misinformation and disinformation plays on the rates of vaccine hesitancy and vaccine uptake for routine immunization among the child and adult populations of the United States. Fifteen articles between 2018-2024 were extracted from PubMed and Google Scholar databases. As shelter-in-place and social distancing protocol wanes, the risk of common vaccine preventable diseases (VPDs) reemerges, especially in populations that have not kept up with routine immunization schedules. Current efforts to restore mass vaccination campaigns are underway, but do not provide the necessary modifications to include social, behavioral, and cultural factors that influence …

A Machine Learning Model For Risk Stratification Of Postdiagnosis Diabetic Ketoacidosis Hospitalization In Pediatric Type 1 Diabetes: Retrospective Study, Devika Subramanian, Rona Sonabend, Ila Singh

Faculty, Staff and Students Publications

BACKGROUND: Diabetic ketoacidosis (DKA) is the leading cause of morbidity and mortality in pediatric type 1 diabetes (T1D), occurring in approximately 20% of patients, with an economic cost of $5.1 billion/year in the United States. Despite multiple risk factors for postdiagnosis DKA, there is still a need for explainable, clinic-ready models that accurately predict DKA hospitalization in established patients with pediatric T1D.

OBJECTIVE: We aimed to develop an interpretable machine learning model to predict the risk of postdiagnosis DKA hospitalization in children with T1D using routinely collected time-series of electronic health record (EHR) data.

METHODS: We conducted a retrospective case-control …

Bispecific Antibodies And Autologous Chimeric Antigen Receptor T Cell Therapies For Treatment Of Hematological Malignancies, Samer Al Hadidi, Helen E Heslop, Malcolm K Brenner, Masataka Suzuki

Faculty, Staff and Students Publications

In recent years, the therapeutic landscape for hematological malignancies has markedly advanced, particularly since the inaugural approval of autologous chimeric antigen receptor T cell (CAR-T) therapy in 2017 for relapsed/refractory acute lymphoblastic leukemia (ALL). Autologous CAR-T therapy involves the genetic modification of a patient's T cells to specifically identify and attack cancer cells, while bispecific antibodies (BsAbs) function by binding to both cancer cells and immune cells simultaneously, thereby triggering an immune response against the tumor. The subsequent approval of various CAR-T therapies and BsAbs have revolutionized the treatment of multiple hematological malignancies, highlighting high response rates and a subset …

Modern Building Structures Are A Landscape-Level Driver Of Bat–Human Exposure Risk In Kenya, Tamika Lunn, Reilly T. Jackson, Paul W. Webala, Joseph G. Ogola, Kristian M. Forbes

Biological Sciences Faculty Publications and Presentations

Identifying the locations and drivers of high-risk interfaces between humans and wildlife is crucial for managing zoonotic disease risk. We suggest that continent-wide improvements to residential housing in Africa are inadvertently creating artificial roosting habitat for synanthropic free-tailed bats (family Molossidae), and that improved buildings are a rapidly accelerating exposure interface that needs urgent research attention and investment. Along a residential gradient in rural southern Kenya, we mapped building use by free-tailed bats in 1109 buildings. We show that bats often roost in human-occupied buildings, with almost one-in-ten buildings exhibiting evidence of bat occupation (9.2%) and one-in-13 found to contain …

Seroprevalence And Associated Risk Factors Of Toxoplasma Gondii Infections In Dogs In Egypt, Abdelfattah Selim, Mohamed Marzok, Hattan S. Gattan, Omar A. Aljabr, Mohammed H. Alruhaili, Mohamed Salem

The Thai Journal of Veterinary Medicine

Toxoplasma gondii is a parasite that is found all over the world and has significant importance in veterinary medicine and public health. Dogs are considered as a final host for the parasite and play an important role in spreading of infection via contamination of environment by oocysts. The study aimed to determine the seroprevalence of T. gondii and analysis risk factors associated with the infections in dogs. A total of 430 blood samples were collected from dogs from three governorates situated at northern Egypt and analyzed using commercial ELISA kit. The overall seroprevalence of T. gondii in dogs was 24% …

The Efficacy Of Common Prosthetic Joint Infection Prevention Strategies: A Systematic Review, Cameron Jennings

Theses and Graduate Projects

Thousands of total hip and knee arthroplasty patients suffer from prosthetic joint infections every year, making them a leading cause of arthroplasty failure. As the number of these procedures continues to grow, so will the healthcare and socio-economic burden of prosthetic joint infections. A comprehensive search for up-to-date literature was completed via the PubMed database, identifying eighteen retrospective and prospective cohort studies that focused on the four prosthetic joint infection prevention methods of interest. Tobacco use cessation of all forms is an efficacious prosthetic joint infection prevention strategy. The common practices of withholding intra-articular injections prior to surgery, using prophylactic …

Immunological Feedback Loops Generate Parasite Persistence Thresholds That Explain Variation In Infection Duration, Clayton E. Cressler, Daniel C.G. Metz, David A. Chang Van Oordt, Andrea L. Graham

School of Biological Sciences: Faculty Publications

Infection duration affects individual host fitness and between-host transmission. Whether an infection is cleared or becomes chronic depends on the complex interaction between host immune responses and parasite growth. Empirical and theoretical studies have suggested that there are critical thresholds of parasite dose that can determine clearance versus chronicity, driven by the ability of the parasite to manipulate host immunity. However, the mammalian immune response is characterized by strong positive and negative feedback loops that could generate duration thresholds even in the absence of direct immunomodulation. Here, we derive and analyse a simple model for the interaction between T-cell subpopulations …

An Agent-Based Modeling Of Permafrost Melting And Virus Exposure Due To Climate Change, Nishat Ara Mozid

Theses and Dissertations

Climate change has affected human life and natural system significantly. Particularly, there is specific evidence of change in the Arctic region for climate warming. One of the consequences of climate change is the process of permafrost degradation and thawing rate of active layer. Permafrost is defined as frozen grounds that exists at a temperature of or below 0℃ for at least two consecutive years, consists of ice and novel pathogens which are frozen for a long time. Anthrax may cause a serious threat for local environment and livestock due to permafrost melting. The study introduces an agent-based modeling of permafrost …

A Systematic Review Of Diabetic Foot Infections: Pathogenesis, Diagnosis, And Management Strategies, Sabyasachi Maity, Noah Leton, Narendra Nayak, Ameet Jha, Nikhilesh Anand, Kamala Thompson, Danielle Boothe, Alexandra Cromer, Yaliana Garcia, Aliyah Al-Islam

School of Medicine Publications

Background: Diabetic foot infection represents a significant complication of diabetes mellitus, contributing substantially to morbidity, mortality, and healthcare expenditure worldwide. Accurate diagnosis relies on a comprehensive assessment integrating clinical evaluation, imaging studies, and microbiological analysis. Management necessitates a multidisciplinary approach, encompassing surgical intervention, antimicrobial therapy, and advanced wound care strategies. Preventive measures are paramount in reducing the incidence and severity, emphasizing patient education, regular foot screenings, and early intervention.

Methods: The researchers performed a systematic review of literature using PUBMED MESH keywords. Additionally, the study was registered in the International Prospective Register of Systematic Reviews at the Center for Reviews …