Digital Commons Network^™

Retinoblastoma Malignance And Exosome Mechanisms Facilitating Optic Nerve Head Metastatic Niche Formation, Cui Shi

Dissertations, Theses, and Capstone Projects

Retinoblastoma (RB) is a rare pediatric ocular tumor that occurs before five years of age and it is the most common intraocular cancer of childhood with more than 300 children in the United States and 8000 diagnosed globally each year. RB arises from the proliferation of cone photoreceptor precursor cells in the retina as a result of mutations in the RB1 gene. The influence of RB secreted factors on cells in the retinal environment has not been fully elucidated. Cancer cell released exosomes have been shown to transform their microenvironment through transfer of metastasis promoting molecular cargo. Cancer cell extracellular …

Understanding Primate Immunity To African Trypanosomes Through The Characterization Of Trypanosome Lytic Factor Formation And Function, Sara Fresard

Dissertations, Theses, and Capstone Projects

African trypanosomes cause an annual loss of over 1 billion USD due to their economic and agricultural burden in Sub-Saharan Africa. These parasites are unicellular, extracellular parasites, that infect humans, cattle, and other livestock. Humans and some non-human primates are protected against most species of trypanosomes due to an innate immunity factor, Trypanosome Lytic Factor (TLF). This modified High Density Lipoprotein (HDL) contains two unique proteins, Haptoglobin Related Protein (HPR), a ligand to a trypanosome surface receptor, and Apolipoprotein-L1 (APOL1), the lytic component. Our overall goal is to use our understanding of primate immunity to create genetically modified cattle that …

Health Behaviors And Physical Health Among Young Adults With Varying Psychometric Schizotypy, Christopher Liong

Dissertations, Theses, and Capstone Projects

Schizophrenia has consistently been associated with increased rates of physical illness and early mortality. One explanation for this association might be poor health behaviors, as people with schizophrenia are more sedentary, less physically active, and more likely to engage in substance use compared to the general population. Schizotypy may be conceptualized as the phenotypic expression of increased risk for schizophrenia spectrum disorders, and dimensional models of schizotypy suggest that it varies on a continuum ranging from non-clinical (i.e. low schizotypy) to clinical (i.e. high schizotypy and dysfunction, as in schizophrenia). Though schizotypy and schizophrenia appear to share similar deficits and …

A Prospective Cohort Study Of Pregnancy Outcomes Following Antepartum Infection With Sars-Cov-2, James D Doss, Emily Diveley, Fan Zhang, Amy Scheffer, Ruizhi Huang, Daniel Jackson, Nandini Raghuraman, Ebony B Carter, Indira U Mysorekar, Jeannie C Kelly

Faculty, Staff and Students Publications

Objectives: Our study aimed to explore the impact of COVID-19 infection on pregnancy outcomes, accounting for the progression of variants, vaccines, and treatment modalities.

Study design: We performed a prospective longitudinal cohort study at two urban tertiary centers enrolling patients with a confirmed intrauterine singleton pregnancy from December 23, 2020 to July 18, 2022. Patients were evaluated for SARS-CoV-2 infection at enrollment and every trimester using serum antibody testing. The primary outcome was preterm birth. Symptom and treatment data were collected from pregnant patients with COVID-19 infections. Variant strain infection status was determined from local wastewater analysis.

Results: 448 patients …

Potentially Functional Variants Of Chmp4a And Panx1 In The Pyroptosis-Related Pathway Predict Survival Of Patients With Non-Oropharyngeal Head And Neck Squamous Cell Carcinoma, Xiaozhun Tang, Huiling Wang, Hongliang Liu, Guojun Li, Erich M Sturgis, Sanjay Shete, Qingyi Wei

Faculty, Staff and Students Publications

Background: Pyroptosis has been implicated in the advancement of various cancers. Triggering pyroptosis within tumors amplifies the immune response, thereby fostering an antitumor immune environment. Nonetheless, few published studies have evaluated associations between functional variants in the pyroptosis-related genes and clinical outcomes of patients with non-oropharyngeal head and neck squamous cell carcinoma (NON-ORO HNSCC).

Methods: We conducted an association study of 985 NON-ORO HNSCC patients who were randomly divided into two groups: the discovery group of 492 patients and the replication group of 493 patients. We used Cox proportional hazards regression analysis to examine associations between genetic variants of the …

Data Driven Decision Making For Sustainable Planning And Operations Of Large Scale Networks, Bahareh Kargar

Dissertations

This dissertation explores data-driven decision-making networks, focusing on sustainable planning and operations for large-scale systems such as healthcare supply chains and power systems. One significant application in healthcare is the optimization of vaccine supply chains. An agent-based simulation-optimization modeling framework is developed to enhance the efficiency and sustainability of vaccine distribution. First, an agent-based epidemiological model of COVID-19 is extended to capture disease transmission dynamics and forecast the number of susceptible individuals and infections. Then, a sustainable vaccine supply chain considering the impacts of greenhouse gases is developed and integrated with the simulation model to minimize total costs and environmental …

About Premedical Programs 2024-25, University Of Dayton

Pre-Health Resource Center Campus Communications

No abstract provided.

Health Services Students’ Knowledge Of Sexually Transmitted Diseases, Özge Akbaba, Ezgi Demirtürk Selçuk

Makara Journal of Health Research

Background: The rising incidence of sexually transmitted diseases (STDs) among young people is a significant public health issue. This study aims to assess the level of knowledge of sexually transmitted diseases among students at a vocational health school.

Methods: A descriptive study was conducted at a university in eastern Turkey from January to June 2024. The sample consisted of 621 students who agreed to participate. Data were collected from a sociodemographic form and the Sexually Transmitted Diseases Knowledge Questionnaire.

Results: Knowledge was higher among males, second-year students, those in the emergency and disaster management program, those with …

Unraveling The Multilevel Dynamics Of Water, Sanitation, And Child Anthropometry In Indonesia, Rifa Kirana, Ahmad Komarulzaman

Makara Journal of Health Research

Background: Anthropometrics, reflecting nutritional status, growth, and development, are crucial elements that can predict a person’s health and well-being. However, low anthropometric measures among children under 5 years remain a significant issue in Indonesia, often influenced by various factors at the household and community levels. Access to clean water and adequate sanitation has been identified as major determinants of these adverse health outcomes. This study analyzes the relationship between anthropometric measures and access to water and sanitation at household and community levels using a multilevel analysis approach.

Methods: The study employs cross-sectional data from the Indonesian Family Life …

Exploring Berberine As A Novel Therapeutic Agent Against Staphylococcus Aureus Infections: Targeting Inflammation And Antibiotic Resistance, Daniel Kopulos

NYMC Student Theses and Dissertations

Staphylococcus aureus is a versatile Gram-positive bacterium commonly found on human skin. While often harmless, it can cause various infections when the skin is compromised, ranging from minor issues to life-threatening conditions in immunocompromised individuals.

The bacterium’s ability to resist antibiotics, particularly methicillin, underscores its clinical challenge. Staphylococcus aureus can also acquire vancomycin resistance. It evades immune responses through multiple mechanisms, including capsule formation, interference with immune proteins like staphylococcal protein A, and secretion of toxins such as Panton-Valentine Leukocidin. Understanding these mechanisms is crucial for developing effective strategies against Staphylococcus aureus infections.

The immune response to Staphylococcus aureus infections …

Antibiotic-Resistant Gram-Negative Bacteria In A Local Wastewater Treatment Plant In North Georgia, Nou Moua, Lindsay Mccuen, Sarah White, Swapna Bhat, Margi Flood, Jeanelle Morgan

Georgia Journal of Science

Antibiotics are some of the most essential lifesaving drugs currently available to us against infectious diseases. Several pathogens are developing resistance to these drugs and many have become resistant to multiple antibiotics. Such multi-drug resistance is becoming a global issue and has been found in many environments including wastewater treatment plants (WWTPs). In this study, we sampled a local WWTP for antibiotic-resistant bacteria. This WWTP is in North Georgia and runs directly into Lake Lanier, which is the main source of drinking water for the Atlanta area as well as a popular spot for water recreation. We obtained treated and …

Unveiling The Complexity Of Nocardia Septic Arthritis In An Immunocompromised Patient: A Case Report, Steven A. Kessler, Meghan R. Mansour, Ali Khreisat, Mamon Tahhan

HCA Healthcare Journal of Medicine

Background

Nocardiosis is the systemic manifestation of Nocardia infection, often found in immunocompromised individuals. Nocardia are transmitted via inhalation or skin wounds, disseminating hematogenously to organs and rarely, joints. We present a patient with immunosuppression who developed gout of the knee with superimposed Nocardial septic arthritis and a possible subsequent systemic infection.

Case Presentation

A 74-year-old man presented with left lower extremity swelling and pain. He was taking immunosuppressive medication for antineutrophilic cytoplasmic antibody-positive vasculitis. A week prior, an arthrocentesis test was positive for gout. He received prednisone without improvement. A repeat arthrocentesis was positive for Nocardia farcinica septic arthritis. …

Atypical Hemolytic Uremic Syndrome Following Influenza B: A Case Report, Kathryn E. Mcgraw, Amanda P. Porter, Alyssa M. Moffitt, Marina E M Golden, Heather Stewart

HCA Healthcare Journal of Medicine

Background

Atypical hemolytic uremic syndrome (aHUS) is a thrombotic microangiopathy that presents with a triad of hemolytic anemia, thrombocytopenia, and acute kidney impairment. It can be attributed to mutations in an array of different complement proteins leading to the overactivation of the complement system, the most impacted being the alternative pathway. Though rare, influenza B has been documented as a potential trigger to the development of aHUS.

Case Presentation

We discuss a 10-year-old girl with a history of aHUS who was found to have a repeat episode of aHUS following an influenza B infection. There have only been a few …

A Clinical Review On Spinal Epidural Abscess: Epidemiology, Pathophysiology, Diagnosis, And Management For Emergency Medicine And Hospitalist Physicians, Madeline A. Guy, Jeffrey S. Guy

HCA Healthcare Journal of Medicine

Spinal epidural abscess (SEA), a critical surgical emergency, demands prompt recognition and intervention to prevent severe complications and fatalities. The incidence of SEA is notably increasing, particularly among individuals with diabetes, intravenous drug use, or a history of invasive spinal procedures. Although SEA can manifest through various clinical symptoms, the presence of its classic triad—back pain, fever, and neurological deficits—is noteworthy despite its occurrence in only 10% to 13% of cases. Identifying this triad is vital due to its high specificity for SEA, which is essential to guiding swift diagnostic and therapeutic actions in a condition where early intervention is …

Covid-19 Infection Wave Mortality From Surveillance Data In The Philippines Using Machine Learning, Julius Migriño Jr, Ani Regina U. Batangan, Rizal Michael R. Abello

Ateneo School of Medicine and Public Health Publications

The Philippines had several COVID-19 infection waves brought about by different strains and variants of SARS-CoV-2. This study aimed to describe COVID-19 outcomes by infection waves using machine learning. A cross-sectional surveillance data review design was employed using the DOH COVID Data Drop dataset as of September 24, 2022. The predominant variant(s) of concern divided the dataset into time intervals representing the infection waves: ancestral (A0), Alpha/Beta (AB), Delta (D), and Omicron (O). Descriptive statistics and machine learning models were generated from each infection. The final data set consisted of 3,896,206 cases wherein 98.39% of cases recovered while 1.61% died. …

Socioeconomic Factors Affecting Healthcare Expenditures In Selected Asian Countries, Nurin Amni Aqilah Binti Cek Ahmad Azam, Mazlynda Md Yusuf

International Journal of Management, Finance and Accounting

The rising cost of healthcare in Asian countries has become a matter of concern, reflecting an extensive influence of socioeconomic factors. This study highlighted that the financial burden on healthcare systems is crucial for ensuring sustainable and equitable access to medical services. However, the impact of socioeconomic factors on healthcare expenditures varies across countries and regions. Therefore, this study seeks to determine socioeconomic factors affecting healthcare expenditures in 10 Asian countries, utilising annual data starting from 2006 to 2020. By employing panel data analysis and the model of fixed effect with a feasible generalised least squares method, the finding shows …

Global Perspective Of The Risks Of Falsified And Counterfeit Medicines: A Critical Review Of The Literature, Aonghus J. Feeney, Jeffery A. Goad, Gerard T. Flaherty

Pharmacy Faculty Articles and Research

Background

Methods

About Premedical Programs At Ud, 2024-25, Udayton

Pre-Health Resource Center Campus Communications

No abstract provided.

Game Theoretic Strategies To Optimize Global Healthcare Resource Allocation During Pandemics, Zachary Nunez

Summer Community of Scholars Posters (RCEU and HCR Combined Programs)

No abstract provided.

From G.R.I.D. To Aids & Covid-19 To Long-Covid: Naming And Defining Biological Threats, J. Ricky Price

Emancipations: A Journal of Critical Social Analysis

This article uses the history of the early U.S. case definition of AIDS to question the imperatives in the newly developed Long-COVID (LC) definition. Doing so allows us to think through the role of case definitions in producing meaning in our world and to consider what we can learn about the politics of knowledge creation. By examining the porous boundaries of identity, institutions, and AIDS and placing this history in relation to LC, I argue that the state is doing more than describing and diagnosing these institutional practices, but that hybrid identities are produced by the state through these practices …

Ethics And Professionalism, Dana Chamberlain Dds

Virginia Dental Journal

This article examines professionalism in dental ethics, based on a working draft of the 2017 Dental Ethics Primer by Drs. Bruce Peltier and Larry Jenson. It highlights the complexities of ethical decision-making and the responsibilities of dental professionals, who must balance autonomy with a commitment to competence and ethical conduct. The article outlines five key components of professionalism, emphasizing the importance of continuous education, adherence to ethical standards, and the willingness to prioritize patient care over personal interests. True professionalism is portrayed as service-oriented and deeply rooted in trust and ethical responsibility.

Combination Therapy Of Ido1 Inhibition And Anti-Pd1 Mediates Anti-Tumor Immunity By Promoting Memory Immunity Development And Cytotoxicity Of Γδ T And Nk Cells Via Il-2 Signaling And By Overcoming Pro-Tumor Effects Of Tgf-Β Signaling, Hyuk Jee

Dartmouth College Master’s Theses

Cutaneous melanoma is the most aggressive form of skin cancer even though it takes only about 1% of all skin cancers. Even among all cutaneous melanomas, NRAS-mutant melanoma is more aggressive than any other, and about 10-25% of all cutaneous melanoma cases have mutations in NRAS. NRAS is a member of the RAS family of proto-oncogenic GTPase proteins, and it plays a key role in signal transduction pathways responsible for cellular survival, proliferation, and metabolism. Immunotherapy is the first line of defense against NRAS-mutant melanoma because, despite tremendous efforts made for decades, it has not been successful to develop small …

From G.R.I.D. To Aids & Covid-19 To Long-Covid: Naming And Defining Biological Threats, J. Ricky Price

Political Science Faculty/Staff Publications

This article uses the history of the early U.S. case definition of AIDS to question the imperatives in the newly developed Long-COVID (LC) definition. Doing so allows us to think through the role of case definitions in producing meaning in our world and to consider what we can learn about the politics of knowledge creation. By examining the porous boundaries of identity, institutions, and AIDS and placing this history in relation to LC, I argue that the state is doing more than describing and diagnosing these institutional practices, but that hybrid identities are produced by the state through these practices …

Prevalence, Clinico-Laboratory Features And Outcomes Of Paediatric Scrub Typhus Cases In A Tertiary Care Centre In Eastern India: A Prospective Observational Study, Raghunath Murmu, Gobinda Mondal, Koushik Biswas, Ashok K. Bala

Sultan Qaboos University Medical Journal

Objectives: Scrub typhus is the most common rickettsial disease in India, caused by Orientia tsutsugamushi and transmitted by chigger mites. Previously prevalent in South India, a resurgence of scrub typhus cases has recently affected Eastern India. This study aimed to estimate the prevalence and describe the clinico-laboratory profile of scrub typhus in paediatric patients (1–12 years old) living in Eastern India. Methods: This prospective observational study was conducted from January to December 2019 at the Dr B C Roy Post Graduate Institute of Paediatric Sciences, Kolkata, India. All acute undifferentiated cases of febrile illness, in patients aged between 1–12 years, …

The Prospect Of Indonesian Herbal As An Alternative Treatment For Covid-19 Patient: A Literature-Based Study, Hadi Sunaryo, Wahyu Hidayati

Indonesian Journal of Medical Chemistry and Bioinformatics

Coronavirus disease 2019 (COVID-19) is a new disease caused by a novel coronavirus, Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). The disease has several symptoms from mild to severe and could lead to death for comorbidities and the elderly. Therefore, the infections and mortality cases keep growing day by day, moreover many authorities are trying to suppress it by applying several health protocols, including medicines. Several studies were conducted on drug discovery from plants to cure the disease. The article aimed to do a narrative review about the prospect of JAMU becoming an alternative medicine to cure COVID-19 by mapping …

What Family Mealtime Brings To The Table, Alicia Kirby Leon

Doctoral Dissertations and Projects

Family mealtimes together appear to play an important role in adolescent mental health. Family mealtime frequency is associated with positive outcomes such as greater well-being, self-esteem, happiness, and better mental health in adolescents. However, the aftermath of the COVID-19 lockdown left behind even higher levels of depression and anxiety and other mental health concerns in adolescents. Moreover, children from lower SES tend to have higher anxiety levels, depressive affect, and stress. In this study, I proposed to help bridge that gap in the research by examining adolescents from low SES families and help determine how much family mealtimes may benefit …

Exploring Health Science Students' Perception Of The Influence Of Health Precaution Practices During The Covid-19 Pandemic, Marquitta L. Foster

Doctoral Dissertations and Projects

The purpose of this phenomenological study was to address a lack of research on health science students’ perceptions and use of health precautions during the COVID-19 pandemic. Albert Bandura’s Social Cognitive Theory frames this study of bachelor's, master’s and doctoral level students at Liberty University, George Mason University, and Norfolk State University. Data was gathered via surveys, interviews, and observations from 35 students across the three universities, providing a diverse pool of age, gender, and ethnicity. The initial survey gathered demographic data on whether students considered themselves immunocompromised, their view on COVID-19's severity for the immunocompromised, and whether they felt …

Leveraging Simulation For Excellence, Alecia Kimberly Liburd

Doctoral Dissertations and Projects

This project aims to identify and address the factors hindering the effective utilization of the simulation lab at Grady Memorial Hospital. Despite the simulation lab’s potential to enhance clinical skills and decision-making abilities through realistic medical scenarios, it remains underutilized. This evaluation project was a pretest and posttest design to assess the impact of educational interventions. Educational workshops, email communications, and awareness campaigns were the primary methods used to increase the understanding and utilization of the simulation lab.

Data analysis involved descriptive and thematic analyses of lab usage metrics and pre- and posttest responses. The findings indicate that simulation-based learning …

West Nile Virus Triggers Intestinal Dysmotility Via T Cell-Mediated Enteric Nervous System Injury, Hana Janova, Fang R. Zhao, Pritesh Desai, Matthias Mack, Larissa B. Thackray, Thaddeus S. Stappenbeck, Michael S. Diamond

2020-Current year OA Pubs

Intestinal dysmotility syndromes have been epidemiologically associated with several antecedent bacterial and viral infections. To model this phenotype, we previously infected mice with the neurotropic flavivirus West Nile virus (WNV) and demonstrated intestinal transit defects. Here, we found that within 1 week of WNV infection, enteric neurons and glia became damaged, resulting in sustained reductions of neuronal cells and their networks of connecting fibers. Using cell-depleting antibodies, adoptive transfer experiments, and mice lacking specific immune cells or immune functions, we show that infiltrating WNV-specific CD4+ and CD8+ T cells damaged the enteric nervous system (ENS) and glia, which led to …

A Novel Perfused Contusion Spinal Cord Injury Model To Assess Rapid Mechanical Properties Changes After Blood Spinal Cord Barrier Breakdown, Laura De Marchi

Theses and Dissertations

Blood-spinal cord barrier (BSCB) disruption exacerbates the tissue damage caused by spinal cord injury (SCI), but the mechanisms and dynamics of how the barrier breakdown affects the mechanical properties of the tissue remain unclear. The perfused bovine ex vivo indentation injury model described here represents a new platform to investigate the short-term effects of altered blood flow and vascular permeability following traumatic spinal cord injury. Our results indicate that injured cords exhibit changes to bulk perfusion, as evidenced by laser speckle contrast imaging, in addition to decreased barrier function shortly after injury. Indentation tests that simultaneously simulate a crush injury …