Digital Commons Network^™

Application Of Artificial Intelligence And Machine Learning For Hiv Prevention Interventions, Yang Xiang, Jingcheng Du, Kayo Fujimoto, Fang Li, John Schneider, Cui Tao

Faculty, Staff and Student Publications

In 2019, the US Government announced its goal to end the HIV epidemic within 10 years, mirroring the initiatives set forth by UNAIDS. Public health prevention interventions are a crucial part of this ambitious goal. However, numerous challenges to this goal exist, including improving HIV awareness, increasing early HIV infection detection, ensuring rapid treatment, optimising resource distribution, and providing efficient prevention services for vulnerable populations. Artificial intelligence has had a pivotal role in revolutionising health care and has shown great potential in developing effective HIV prevention intervention strategies. Although artificial intelligence has been used in a few HIV prevention intervention …

A Qualitative Investigation Of Organizational Challenges And Facilitators To Screening Individuals Experiencing Homelessness For Hepatitis C Virus (Hcv) In Houston, Texas, Alane Celeste-Villalvir, J Michael Wilkerson, Christine Markham, Lourdes Rodriguez, Vanessa Schick

Faculty, Staff and Student Publications

BACKGROUND: Individuals experiencing homelessness may be at a disproportionately high risk for hepatitis C (HCV) because they may be more likely to engage in HCV risk behaviors. Community organizations that provide services to these vulnerable individuals can effectively screen, diagnose, and navigate them into HCV care. However, screening people experiencing homelessness for HCV at such organizations is limited by various challenges that remain understudied, including budgetary considerations and strategies to improve teamwork and communication. Accordingly, this study investigated the organizational challenges and facilitators to HCV screening of individuals experiencing homelessness as reported by homeless services providers.

METHODS: Staff (N = …

Methodology To Estimate Natural- And Vaccine-Induced Antibodies To Sars-Cov-2 In A Large Geographic Region, Stacia M Desantis, Luis G León-Novelo, Michael D Swartz, Ashraf S Yaseen, Melissa A Valerio-Shewmaker, Yashar Talebi, Frances A Brito, Jessica A Ross, Harold W Kohl, Sarah E Messiah, Steve H Kelder, Leqing Wu, Shiming Zhang, Kimberly A Aguillard, Michael O Gonzalez, Onyinye S Omega-Njemnob, David Lakey, Jennifer A Shuford, Stephen Pont, Eric Boerwinkle

Faculty, Staff and Student Publications

Accurate estimates of natural and/or vaccine-induced antibodies to SARS-CoV-2 are difficult to obtain. Although model-based estimates of seroprevalence have been proposed, they require inputting unknown parameters including viral reproduction number, longevity of immune response, and other dynamic factors. In contrast to a model-based approach, the current study presents a data-driven detailed statistical procedure for estimating total seroprevalence (defined as antibodies from natural infection or from full vaccination) in a region using prospectively collected serological data and state-level vaccination data. Specifically, we conducted a longitudinal statewide serological survey with 88,605 participants 5 years or older with 3 prospective blood draws beginning …

Evaluation Of The Kitchen Microbiome And Food Safety Behaviors Of Predominantly Low-Income Families, Christina K Carstens, Joelle K Salazar, Shreela V Sharma, Wenyaw Chan, Charles Darkoh

Faculty, Staff and Student Publications

Bacterial pathogens in the domestic environment present a risk to residents, particularly among susceptible populations. However, the impact of consumer demographic characteristics and food handling methods on kitchen microbiomes is not fully understood. The domestic kitchen bacterial communities of ten predominantly low-income families in Houston, TX, were assessed in conjunction with a cross-sectional food safety survey to evaluate differences in household and surface-specific microbiomes and bacterial foodborne pathogen presence. Three kitchen surfaces within each household, including the sink drain, the refrigerator handle, and the counter, were environmentally sampled and metataxonomically evaluated via targeted 16S rRNA sequencing. Disposable dish sponges were …

Emergence Of Dual And Multicarbapenemase Coproducing Organisms In The United States, Bekana K Tadese, Tolulope Olumuyiwa, Charles Darkoh

Faculty, Staff and Student Publications

Carbapenemase-producing organisms commonly carry a single carbapenemase gene conferring resistant to carbapenems and other β-lactam antibiotics. Here, we report rare cases of multidrug-resistant

"Don't Know Where To Go For Help": Safety And Economic Needs Among Violence Survivors During The Covid-19 Pandemic, Leila Wood, Elizabeth Baumler, Rachel Voth Schrag, Shannon Guillot-Wright, Dixie Hairston, Jeff Temple, Elizabeth Torres

Faculty, Staff and Student Publications

The COVID-19 pandemic and related quarantine has created additional problems for survivors of interpersonal violence. The purpose of this study is to gain a preliminary understanding of the health, safety, and economic impacts of the COVID-19 pandemic on people that are experiencing or have previously experienced violence, stalking, threats, and/or abuse. An online survey, open from April to June 2020, was taken by people with safety concerns from interpersonal violence. Participants were recruited from IPV and sexual assault-focused agencies, state coalitions, and social media. Quantitative data were summarized using descriptive methods in SPSS and coding methods from thematic and content …

Determinants Of Social Distancing Adherence, Philip Gerretsen, Julia Kim, Eric E Brown, Lena C Quilty, Samantha Wells, Fernando Caravaggio, Jianmeng Song, Marcos Sanches, Branka Agic, Bruce G Pollock, Ariel Graff-Guerrero

Faculty, Staff and Student Publications

Introduction: Governments and public health authorities across many jurisdictions implemented social (physical) distancing measures to contain the spread of the 2019 novel coronavirus disease (COVID-19). Adherence to these measures is variable and likely influenced by various factors. This study aimed to 1) identify the individual sociodemographic, COVID-19 and social distancing related, and psychological determinants of social distancing adherence, and 2) explore regional differences in social distancing adherence in the United States (U.S.) and English-speaking Canada based on each region's discrepant response to social distancing restrictions.

Methods: A web-based repeated cross-sectional survey was conducted in 4,942 English-speaking participants from the four …

Epidemiology Of Antibiotic Use And Drivers Of Cross-Border Procurement In A Mexican American Border Community, Heather T Essigmann, David A Aguilar, William B Perkison, Katherine G Bay, Magdalena R Deaton, Sharon A Brown, Craig L Hanis, Eric L Brown

Faculty, Staff and Student Publications

BACKGROUND: The U.S.-Mexico Border is an area of opportunity for improved health care access; however, gaps remain as to how and where U.S. border residents, particularly those who are underinsured, obtain care. Antibiotics are one of the most common reported drivers of cross-border healthcare access and a medication of particular concern since indiscriminate or inappropriate use is associated with antimicrobial resistance. In addition, many studies assessing preferences for Mexican pharmaceuticals and healthcare in U.S. border residents were done prior to 2010 when many prescription medications, including antibiotics, were available over the counter in Mexico.

METHODS: Data used in this study …

The Homelessness Crisis In Los Angeles, California, Kaitlin Butulan

Selected Social Change Portfolios in Prevention, Intervention, and Consultation

Goal Statement: The goal of my social change portfolio is to implement intervention and prevention strategies that lead us one step closer toward eradicating the homelessness crisis in Los Angeles.

Significant Findings: Los Angeles is the home of one of the largest unhoused populations in the United States. The leading causes to becoming homeless include lack of affordable housing, unemployment, pathological illnesses, and necessary resource impediments (National Law Center on Homelessness & Poverty, 2015). This social change portfolio discusses the risk and protective factors of the unhoused on a range of levels viewed in the lens of a social-ecological model. …

A Multicenter Weighted Lottery To Equitably Allocate Scarce Covid-19 Therapeutics, Govind Persad, Erin K. Mccreary, Chung-Chou H. Chang, Mark Schmidhoffer

Publications

Shortages of new therapeutics to treat coronavirus disease (COVID-19) have forced clinicians, public health officials, and health systems to grapple with difficult questions about how to fairly allocate potentially life-saving treatments when there are not enough for all patients in need. Shortages have occurred with remdesivir, tocilizumab, monoclonal antibodies, and the oralantiviral Paxlovid.

Ensuring equitable allocation is especially important in light of the disproportionate burden experienced during the COVID-19 pandemic by disadvantaged groups, including Black, Hispanic/Latino and Indigenous communities, individuals with certain disabilities, and low-income persons. However, many health systems have resorted to first-come, first-served approaches to allocation, which tend …

Dose Optimisation And Scarce Resource Allocation: Two Sides Of The Same Coin, Govind Persad, Govind C. Persad, William F. Parker, Srinivas Murthy

Publications

Objective: A deep understanding of the relationship between a scarce drug's dose and clinical response is necessary to appropriately distribute a supply-constrained drug along these lines.

Summary of key data: The vast majority of drug development and repurposing during the COVID-19 pandemic – an event that has made clear the ever-present scarcity in health care systems –has been ignorant of scarcity and dose optimisation's ability to help address it.

Conclusions: Future pandemic clinical trials systems should obtain dose optimisation data, as these appear necessary to enable appropriate scarce resource allocation according to societal values.

Race-Specific, State-Specific Covid-19 Vaccination Rates Adjusted For Age, Govind Persad, Kaitlyn M. Berry, Govind C. Persad

Publications

The authors provide the first age-standardized race/ethnicity-specific, state-specific vaccination rates for the United States. Data encompass all states reporting race/ethnicity-specific vaccinations and reflect vaccinations through mid-October 2021, just before eligibility expanded below age 12. Using indirect age standardization, the authors compare racial/ethnic state vaccination rates with national rates. The results show that white and Black state median vaccination rates are, respectively, 89 percent and 76 percent of what would be predicted on the basis of age; Hispanic and Native rates are almost identical to what would be predicted; and Asian American/Pacific Islander rates are 110 percent of what would be …

The Dynamics Of Cross-Sector Collaboration In Centralized Disaster Governance: A Network Study Of Interorganizational Collaborations During The Mers Epidemic In South Korea, M. Ku, Ahreum Han, Keon Hyung Lee

Health Care Administration Faculty Research

The debate continues as to which governance structure is most appropriate for collaborative disaster response, particularly between centralization and decentralization. This article aims to contribute to this debate by analyzing the structural characteristics of a multisectoral network that emerged and evolved under strong state control during the 2015 outbreak of Middle East respiratory syndrome-coronavirus (MERS) in South Korea. This study particularly focuses on the evolution of intra- and inter-sectoral collaboration ties in the network. The data for the study were collected through a content analysis of government documents and news articles. Using social network analysis, the authors found that the …

Essential But Ignored: Covid-19 Litigation And The Meatpacking Industry, Alexia Brunet Marks

Publications

The spread of the novel coronavirus SARS-CoV-2 (COVID-19) among meatpacking employees forced closures and slowdowns at many plants across the United States. As the meatpacking giants JBS, Smithfield, and Tyson became hotbeds for COVID-19, national meat production plummeted. To forestall further supply chain disruptions, former President Trump passed an Executive Order compelling plants to continue operating as “essential businesses.” As work continued, employees reported that social distancing and mask-wearing were not being enforced, managers were pressuring sick employees to work and not revealing co-worker’s infections, and an overall lack of Personal Protective Equipment (PPE) or training to reduce the risk …

Stress Analysis On Walls In Complex Fluids With Fluid-Solid Interaction, Dehong Fang

Graduate Research Theses & Dissertations

The wall shear stress (WSS) in blood vessels influences many biological processes, such as atherosclerosis, clot growth, angiogenesis, aneurysm rupture, and blood cell transport and adhesion. The deformable red blood cells (RBCs) in blood flow make the WSS even more complex. To analyze the WSS in complex fluids with cell suspensions, numerical simulations of blood flows in simple straight channels were conducted, where the fluid-solid interactions were simulated by immersed boundary-lattice Boltzmann method. The spatiotemporal dynamics of WSS were analyzed using dynamic mode decomposition (DMD), which is a technique that can extract the low-rank spatiotemporal features from complex fluids. The …

Untitled, Nate Singh

The Art of Medicine

No abstract provided.

Structural Basis Of Bacterial Flagellin For Naip5 Binding And Nlrc4 Inflammasome Activation And The Mechanism Of Flagellin Induced Release Of Cytokines In Vivo, Jian Cui

Theses and Dissertations--Chemistry

The bacterial flagellum is a whip-like structure that protrudes from the cell membrane and is one of the most complex and dynamic biological molecular machines that propels bacteria to swim toward beneficial environments and the sites of infection. It is composed of a basal body, a hook, and a long filament. The flagellar filament contains thousands of copies of the protein flagellin (FliC) monomer arranged helically and ending with a filament cap composed of oligomer protein FliD. The overall structure of the filament core is preserved across bacterial species, while the outer domains exhibit high variability, and in some cases …

Mechanism Of Antibiotic Permeability Through The Gram-Negative Bacterial Envelope, Olaniyi Alegun

Theses and Dissertations--Chemistry

The outer membrane of Gram-negative bacteria (GN) makes them distinct among superbugs that are associated with the development of antibiotic resistance. The outer membrane, and inner membrane, separated by the periplasm, form a double-membrane barrier to the entry of antibiotics into the cell. Several studies have been conducted to examine the role of outer membrane modifications such as porins, lipopolysaccharides, and efflux pumps on antibiotic resistance. However, there is a paucity of knowledge on how antibiotics behave in the periplasm, to gain access into their target region. My thesis focuses on understanding the mechanism of antibiotic permeability through the cellular …

Antibiotic Permeation In Gram-Negative Bacteria And Contribution Of Inflammasome Activation And Pyroptosis In Pathogenesis Of Salmonella Systemic Infection, Ankit Pandeya

Theses and Dissertations--Chemistry

Antibiotic resistance is one of the major global issues in the field of public health and medicine. Good antibiotic candidates need to be selectively toxic, inhibit cellular target, and effectively penetrate and accumulate in bacterial cells. The last factor is a formidable barrier in the development of antimicrobials effective in Gram-negative bacteria, due to the presence of two layers of cell envelope. The first half of my thesis focuses on understanding the permeation of small molecules through this formidable cell envelope, distribution inside the cell of Gram-negative bacteria, and design of novel methods to make small molecules effectively cross the …

Art Of Medicine - 2022

The Art of Medicine

No abstract provided.

“There Was Me Before Prp, And Then There Was Me After I Participated In Prp”: A Mixed-Methods Program Evaluation Of A Pharmacy Summer Pipeline Program, Cynthia Schaefer

Graduate Research Theses & Dissertations

Nationwide, there has been a decline in the number of applicants to PharmD programs.

Additionally, there is a lack of diversity in the healthcare workforce that leads to inequitable healthcare for diverse populations of patients. As a result, various recruitment tactics, including pipeline programs, have been used to develop a larger, more diverse applicant pool to the College of Pharmacy at a regional satellite campus in the Midwest. The purpose of this mixed methods summative program evaluation was to examine the experiences of participants of a pipeline program hosted at a regional satellite campus for a pharmacy program to determine …

Cell-Engineered Vesicles For Therapeutic Delivery And Immunomodulatory Applications, Khaga Neupane

Theses and Dissertations--Chemistry

Development of a new kind of drug delivery system (DDS) that could efficiently deliver therapeutics to the cell of interest would allow us to accomplish cell-specific drug delivery while eliminating systemic toxicity. Although nanocarriers including endogenously released extracellular vesicles (EEVs), liposomes, and small molecules seem to be promising drug delivery systems, biological challenges persist for their use in clinical applications. Here, we demonstrate nanovesicles engineered by fragmenting cellular membranes can be exploited as versatile DDSs for therapeutics delivery as well as immunomodulatory functions. Cell-engineered vesicles were produced by cavitating cells using nitrogen gas at high pressure followed by serial centrifugation. …

A Case For Deference In American Indian Health Law, Ashley Murphy

American Indian Law Review

No abstract provided.

Demographic, Clinical, And Co-Morbidity Characteristics Of Covid-19 Patients: A Retrospective Cohort From A Tertiary Hospital In Kenya, Reena Shah, Jasmit Shah, Nancy Kunyiha, Sayed Karar, Shahin Sayed, Salim Surani, Mansoor Saleh

Internal Medicine, East Africa

Introduction: The first documented case of COVID-19 in Kenya was recorded March of 2020. Co-morbidities including hypertension and diabetes have been associated with increased morbidity, hospitalization, and mortality among COVID-19 patients. This retrospective study describes the clinical characteristics, disease severity, and outcomes among the patient population at a tertiary hospital in Kenya.

Methods: This was a retrospective descriptive study of COVID-19 patients who were admitted between March 2020 and December 2020 at the Aga Khan University Hospital in Nairobi, Kenya. Data collected include patient demographic and baseline characteristics. Differences between patients who were known to have diabetes and hypertension during …

Genetic Diversity In L1 Orf Of Human Papillomavirus In Women With Cervical Cancer With And Without Human Immunodeficiency Virus In Botswana And Kenya, Leabaneng Tawe, Wonderful T. Choga, Giacomo M. Paganotti, Ontlametse T. Bareng, Tlhalefo D. Ntereke, Pleasure Ramatlho, Doreen Ditshwanelo, Simani Gaseitsiwe, Ishmael Kasvosve, Elkanah Omenge

Obstetrics and Gynaecology, East Africa

Background: The variation of human papillomavirus (HPV) genotypes shapes the risks of cervical cancer and these variations are not well defined in Africa. Nucleotide changes within the L1 gene, nucleotide variability, and phylogeny were explored in relation to HIV in samples from Botswana and Kenya. Methods: A total of 98 HPV-positive cervical samples were sequenced to identify diferent HPV variants. Phylogenetic inferences were used to determine HPV genotypes and investigate the clustering of sequences between women living with HIV (WLWHIV) and -women not living with HIV (WNLWHIV). Results: Out of 98 generated sequences, 83.7% (82/98) participants had high-risk (HR) HPV …

Stony Coral Tissue Loss Disease And Other Diseases Affect Adults And Recruits Of Major Reef Builders At Different Spatial Scales In The Dominican Republic, Aldo Croquer, Someira Zambrano, Samuel King, Aurelio Reyes, Rita I. Sellares Blasco, Andreina Valdez Trinidad, Maria Villalpando, Yira Rodriguez-Jerez, Estefany Vargas, Camilo Cortes-Useche, Macarena Blanco, Johanna Calle-Triviño, Rebecca García-Camps, Ana C. Hernández-Orquet, Ruben Torres, Iker Irazabal, Laura Díaz, Yassmin Evangelista, Emy Miyazawa

Gulf and Caribbean Research

Monitoring programs can help understand coral disease dynamics. Here, we present results from a national program in the Dominican Republic (DR) aimed at evaluating coral diseases 3 times a year following a nested spatial design. Prevalence of coral diseases in DR varied from sites to regions, suggesting that disease dynamics can be driven by local processes and/or across larger spatial scales. Three diseases were common: Dark Spot (DSD), Yellow Band (YBD) and Stony Coral Tissue Loss Disease (SCTLD). DSD and YBD were more prevalent across the western coast (north and south), whereas SCTLD was restricted for the study period to …

An Examination Of Street-Level Drug Enforcement Tactics And Court Outcomes, Nicholas Paul

Electronic Theses and Dissertations, 2020-2023

While there is a substantial body of placed-based evaluations of drug enforcement strategies, little is known about the nature and effectiveness of the routine tactics used by local police to target individual drug offenders. This study used a mixed-method approach to build on existing research on the efficacy of drug enforcement by documenting the nature and consequences of street-level drug enforcement at the local level. First, a focus group of drug enforcement experts was conducted to identify the tactics used to generate arrests and various types of evidence believed to strengthen drug cases. Next, official data in the form of …

'The Perfect Shouldn't Be The Enemy Of The Good' — What Canada Can Do Today, Tomorrow & Next Week To Enhance Equitable Access To Covid-19 Biopharmaceutical Interventions, Matthew Herder

Reports & Public Policy Documents

There is overwhelming evidence of inequitable access to a range of COVID-19 targeting biopharmaceutical interventions, including not only vaccines but also anti-viral drug therapies, diagnostic tests, and various materials that are incorporated into these products. As recently explained by Yamey et al. in the British Medical Journal, inequitable access is baked into every phase of the biopharmaceutical system—from production and allocation to affordability and deployment. Yet, it is still possible to improve access to these critically important biopharmaceutical interventions in low and middle-income countries (LMICs). Intellectual property (IP) rights are one crucial site where policy intervention can make an immediate …

Voices Of The Often Unheard: The Environmental Impacts Of Catastrophic Wildfire Events On Individuals With Developmental Disabilities, Mary Madison Mckenzie

Graduate Student Theses, Dissertations, & Professional Papers

The Thomas Fire for a time was the largest wildfire in California history, burning 281,893 acres and destroying 1,063 structures. Within three years, the August Complex Fire, at 1,032,649 acres, almost quadrupled that record. Climate related disasters such as these have impelled social science researchers to heed calls for a paradigm shift in understanding the risks climate change poses to the social world, in particular, disaster risks for vulnerable groups. Existing research tends to focus on disasters such as hurricanes, featuring risks for vulnerable populations by race, class, and/or individuals with disabilities in general, but not for individuals with developmental …

Tracing Migration And Social Stratification In Subadults At The Archaeological Site Of Convento: A Preliminary Strontium Isotopic Analysis, Holli Kaye Mcdonald

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.