Bacterial Infections and Mycoses Commons^™

Standardized Infection Prevention Protocol To Reduce Surgical Site Infections In Pediatric Neurosurgery, Pisey Kareth

All Doctor of Nursing Practice (DNP) Scholarly Projects

Problem: Surgical site infections (SSIs) are a significant concern in the pediatric neurosurgical patient population and are associated with increased morbidity, longer hospital stays, and increased medical expenses. The absence of a standardized preoperative infection prevention process led to variability in perioperative care practices and infections at the practicum site.

Aim of the Project: The aim of the project was to reduce the incidence of SSIs among pediatric patients undergoing neurosurgical procedures who were initially evaluated in an ambulatory setting.

Review of the Evidence: Evidence supports the implementation of bundled infection prevention strategies as a more effective approach to reducing …

Comparative Investigation Of Bacterial Adhesion On Medical Device Thermoplastics, Dev V. Mehta

Honors Theses

This project will focus on determining if differences in bacterial cell wall composition influences adhesiveness to thermoplastic materials used to construct patient orthotic splints. Bacteria with decreased adhesion are unable to remain bonded to orthotic splints, increasing its ability to transfer to a patient’s wound, leading to an infection. Antibiotic resistant bacteria used in this investigation included gram-positive cocci vancomycin-resistant (VRE) Enterococcus faecalis, methicillin-resistant Staphylococcus aureus (MRSA), and gram-negative rods extended-spectrum beta-lactamase (ESBL) Escherichia coli and Pseudomonas aeruginosa. Each test bacterium is a major pathogen causing healthcare-associated infections (HAIs). Saline, artificial perspiration, and ascites fluids were used to determine the …

Understanding The Role Of Toxs As A Bile Sensing Component Of The Toxrs Virulence Regulatory System In Vibrio Spp., Minje Kim

Dartmouth College Ph.D Dissertations

Pathogenic Vibrio bacteria, such as V. cholerae and V. parahaemolyticus, colonize in the human small intestine to cause severe gastrointestinal disease. During the infection, these bacteria encounter bile salts, antimicrobial cholesterol metabolites secreted into the intestine. Pathogenic Vibrio species have evolved to utilize bile salts as signals to regulate virulence. The signaling depends in part on ToxRS, a conserved co-component transmembrane transcription regulator. ToxRS consists of the transcription factor ToxR and its membrane-tethered binding partner ToxS. ToxS is required for ToxR stability and full transcriptional activity. Although bile salts are known to influence ToxRS-dependent virulence gene expression, the molecular …

Investigating The Synthesis And Antibacterial Activity Of A Main-Chain Cationic Polymer, Emily Smith

Honors Theses

Antibiotic resistance is a growing threat to public health. Due to the overuse of antibiotics in agriculture, the overprescription of antibiotics, and the misuse of antibiotics by patients, antibiotic resistance is spreading at an alarming rate. As antibiotic resistance spreads, the antibiotics we depend on to treat common infections become ineffective. Therefore, it is imperative to develop novel treatments for infections that do not increase the prevalence of antibiotic resistance. One treatment being explored is the use of synthetic polymers with antibacterial properties. Synthetic polymers are advantageous because they can be synthesized from widely available precursors and their structure is …

Antibiotics And You: A Comprehensive Guide, Brady Haas

Senior Theses

Antibiotic resistance is a rapidly emerging issue within public health. As resistance grows, the effectiveness of traditional antibiotic therapies diminishes while risk of treatment grows. Alongside novel therapies, public knowledge is a strong combatant of the resistance-related risks of antibiotic usage. Through a comprehensive review of current literature, this work serves as an accessible guide to the mechanisms of antibiotics, bacterial resistance, and the challenges related to current antibiotic usage. Additionally, the ability of current policy and emerging novel treatments, such as nanoparticles and bacteriophage therapy, to fight antibiotic resistance is evaluated. This analysis highlights the importance of improving public …

Implementing A Sepsis Questionnaire To Reduce Readmissions…A Health Plan’S Experience, Vernita L. Kelley

All Doctor of Nursing Practice (DNP) Scholarly Projects

Problem: Sepsis is a life-threatening condition with high readmission risk, threatening patient recovery and survival. In the managed care organization (MCO) where this DNP project was implemented, sepsis ranks among the top five readmission diagnoses. The organization's 30-day readmission rate of 15.5% is substantially higher than the benchmark of 9.29%, highlighting a clinical quality issue, a strain on patient outcomes, and a strain on healthcare resources.

Aim of the Project: This quality improvement (QI) project aimed to reduce sepsis readmissions by embedding a sepsis questionnaire into case management workflows to identify clinical risks and social determinants of health, improve transitions, …

Enhancing Preparedness: A Genetic Study Of Sar-Cov-2 And Other Microbial Public Health Threats In Wastewater From A College Town, Christian N. Hutchinson

Master's Theses

Problem

The SARS-CoV-2 (COVID-19) pandemic revealed both the systemic vulnerabilities of our healthcare system as well as the importance of timely, localized data for informing public health responses. Traditional testing approaches were essential but often failed to capture the full extent of viral spread, especially in those with mild or asymptomatic conditions that relied on at home testing. This underreporting hindered effective allocation of resources and made developing effective intervention strategies difficult. We also realized the potential for wastewater surveillance to be applied to tracking antimicrobial resistance gene markers. Taken together, this approach should have important implications for improving public …

Improving Icu Decolonization Compliance Among Nursing Staff, Sarah J. Moore

Student Scholarly Projects

Practice Problem: Hospital acquired infections (HAIs) burden patients and health care organizations by influencing extended hospital stays, increasing mortality risk, and increasing healthcare spending.

PICOT: The Doctor of Nursing Practice (DNP) Scholarly Project was guided by the PICOT question: In ICU nursing staff (P), how does the implementation of a standardized process with visual reminders and checklists (I) compared to no reminders or checklists (C) impact compliance with the decolonization protocol for HAI reduction (O) over four weeks?

Evidence: A review of evidence-based literature demonstrated efficacy in the reduction of HAIs through once daily bathing with 2% chlorhexidine gluconate (CHG) …

Self-Reported Audiological And Vestibular Symptoms Associated With Lyme Disease, Daniella A. Bryan

Dissertations, Theses, and Capstone Projects

Background:

Lyme disease, an infectious vector-borne illness, is carried by the deer tick, Ixodes scapularis, which harbor the spirochete, Borrelia burgdorferi, affecting hundreds of thousands of people in the United States annually. Lyme disease has a multitude of clinical presentations and overlaps with other complex illnesses, making diagnosis and treatment a medical challenge. This distinct bacterium can migrate into any organ system through the mediums of soft tissue, the lymphatic system, and the circulatory system. Despite its prevalence and range in symptomatology, minimal research has been conducted to identify distinct audiological and vestibular symptoms associated with a Lyme …

A Modified Sir Model Used To Investigate The Relationship Between Congenital And Adult Syphilis, Kaleesta R. Waysman

Honors Thesis

A complex SIR model integrating the relationship between adult and congenital syphilis was developed. The goal of the project was to determine the specific population(s) or control strategies that should be enforced, altered, or removed to decrease the number of children experiencing clinical sequelae due to congenital syphilis. Early clinical sequelae include hydrops fetalis, preterm birth, central nervous system infection, hepatosplenomegaly, hyperbilirubinemia, cholestasis, hemolytic anemia, snuffles, osteochondritis, and lesions or rashes in the palms and soles. Late clinical sequelae include interstitial keratitis, hearing loss, Hutchinson teeth, saber shins, Clutton joints, mulberry molars, and saddle nose. After implementing real-world data into …

‭Prevalence Of Potentially Pathogenic Bacteria In Showers At A Long-Term Nursing Care Facility, Joseph Caleb Kulon

Honors Theses

Pathogenic bacteria on environmental surfaces in nursing homes may contribute to the‬ growing burden of healthcare-associated infections (HAIs), particularly as the U.S. population‬ ages and more individuals transition into long-term care. In this study, 70 swab samples were‬ collected from five community shower rooms at a nursing home over three sampling trips. Five‬ common shower surfaces were sampled: the floor drain, shower bench, faucet/valves, shower‬ curtain, and grab bars. Samples were processed in the UTC CIDC microbiology lab and‬ inoculated onto four selective and differential media: Hardy CHROM MRSA agar (for‬ methicillin-resistant‬‭ Staphylococcus aureus‬‭ [MRSA]‬‭ and‬‭ S. pseudintermedius‬‭ [SIM]), mannitol‬ …

Bacterial Contamination Of Wheelchairs In A Long-Term Rehabilitation Facility, Storm A. Welch

Honors Theses

The presence of bacterial contamination on wheelchair surfaces in long-term care facilities poses a significant risk to infection control and patient safety. This study aimed to assess the prevalence and diversity of bacterial species, including Staphylococcus aureus (SA), methicillin-resistant Staphylococcus aureus (MRSA), Staphylococcus epidermidis (SE), Pseudomonas spp., and enteric bacteria on five key components of wheelchairs at a local long-term care facility. A total of 320 swabs were collected from wheelchair components, including handles for pushing, armrests, seats, wheel handles, and tires. Samples were analyzed using selective culture media, and bacterial species were identified based on colony morphology. The results …

The Role Of Horizontal Gene Transfer In Antibiotic Resistance Amidst Prevalent Community And Healthcare-Associated Mrsa Rates, Gabrielle Nascimento

Honors College Theses

In recent decades, cases of community-acquired MRSA (CA-MRSA) and healthcare-associated MRSA (HA-MRSA) have been on the rise. The ability of antibiotic resistance to transfer between microorganisms greatly expands its threat to the effective treatment and containment of bacterial infections. The mecA gene is found on a mobile cassette within the Staphylococcal cell and encodes for PBP2a, an alternate version of penicillin-binding protein (PBP) with less binding affinity for β-lactam antibiotics, increasing resistance to the effects of antibiotics. The goal of this research is to investigate the horizontal transfer of the mecA gene between various Staphylococcus species as well as to …

Development Of A Proposed Selective Medium For The Isolation And Differentiation Of P. Sordellii, Dimyana Bottros

Honors Undergraduate Theses

Clostridium, a genus of anaerobic, spore-forming bacteria, includes clinically and ecologically significant species like Clostridium difficile and Paeniclostridium sordellii. C. difficile causes antibiotic-associated colitis, while P. sordellii is linked to fatal infections and spontaneous abortions. Recent studies found both species in marine sediments, suggesting their role in environmental and wildlife health disturbances, including the 2013 mass mortality of over 300 manatees in the Indian River Lagoon. However, isolating and differentiating P. sordellii is challenging due to the lack of selective media optimized for its growth. This thesis proposes a novel selective medium tailored to P. sordellii’s physiological …

Ribosome Hibernation In Mycobacterium Abscessus And Its Effect On Antibiotic Resistance, Ryan Treen

Electronic Theses & Dissertations (2024 - present)

Non-tuberculosis mycobacteria (NTM) represent a diverse repertoire of species, most of which are ubiquitous in the environment. Some NTM species, such as Mycobacterium abscessus, can cause life-threatening infections in people with underlying medical conditions. The clinical incidence of such infections is on the rise, posing an emerging threat to public health. M. abscessus is characterized by intrinsic and acquired antibiotic resistance, complicating treatment strategies. Most chemotherapeutic approaches for M. abscessus infection target the bacterial ribosome, necessitating a better understanding of the physiological processes which confer this resistance. Multiple mycobacterial species respond to zinc-limiting conditions by inducing remodeling and hibernation …

Diversity Within Species: Mechanisms, Evolution And Implications In Bacterial Disease, Kathryn R. Piper

Electronic Theses & Dissertations (2024 - present)

The Gram-positive bacterium Staphylococcus aureus and the Gram-negative bacterium Escherichia coli are ubiquitous commensal and opportunistic pathogens. In humans, S. aureus is commonly found on the skin and mucus membranes, and is known to cause infections in the skin, bloodstream and brain. E. coli is a normal part of the gut microbiota in humans and can cause intestinal and extraintestinal infections alike. S. aureus and E. coli pose global threats to public health, due to the high morbidity and mortality of invasive strains. The wide range of infections they cause in humans and other animals are exacerbated by the presence …

Identifying The Role And Influence Of Interleukin-27 On The Neonatal Immune Response, Jordan Kane Vance

Graduate Theses, Dissertations, and Problem Reports (ETD)

The first month of life is a critical and vulnerable developmental stage, characterized by a heightened risk of life-threatening infections. Each year, 1.3 million newborns succumb to neonatal bacterial sepsis. The immune system during the neonatal period has unique features that lead to inefficiencies at clearing infection. Early life immunity is characterized by a Th2-biased profile with decreased IL‑12, IFN-γ, and TNF-α, along with increased IL‑6 and IL‑23. Additionally, IL‑27, an immunosuppressive cytokine, is also elevated during this period and further contributes to susceptibility to infection. Early diagnosis and intervention are critical in administering effective care in newborns and there …

Design, Synthesis, And Nmr-Guided Characterization Of A Targeted Covalent Inhibitor-Like Molecule Against Ivyp1 From P. Aeruginosa, Samuel Taylor Moore

Master's Theses

Multi-drug resistance poses a serious threat to future generations and historical antibiotic pipelines; consequently, the medical and economic burdens associated with treating multidrug-resistant bacteria are substantiated. In this context, P. aeruginosa (PA) emerges as one of the most significant healthcare challenges, being a leading cause of resistance-associated mortality worldwide. Despite modern efforts to combat these poor outcomes, drug-resistant cases continue to rise, and the need for novel antibiotic treatment is apparent. To this end, we investigated relevant resistance mechanisms and past antibiotic targets within PA, and in doing so, we identified relationships between peptidoglycan biology and a periplasmic protein, Inhibitor …

Antibiotic Resistance In Livestock: A Literature Review Of Its Consequences And International Effort On Human Antimicrobial Agents Resistant Crisis, Ha Nguyen

Theses and Graduate Projects

Background: Despite their benefits, the overuse of antibiotics in livestock has resulted in negative consequences to human health and the augmenting of an antibiotic-resistant crisis. Countries worldwide have conducted analyses and confirmed the growth of bacterial strains immune to most antibiotics. The widespread use of antibiotics is shown in various sectors, including human medicine and agriculture, leading to the emergence of antibiotic-resistant bacterial strains.

Purpose: This comprehensive literature review focuses on finding the connection between the usage of antibiotics in livestock, the transfer of antibiotic resistance to humans through consumption and exposure, and international efforts to find solutions to antimicrobial …

Pilz Domain-Containing Proteins Regulate Motility In Acinetobacter Baumannii, Gabriel Smith

Electronic Theses and Dissertations

Acinetobacter baumannii is an increasingly multidrug-resistant pathogen contributing to hospital-acquired infections, necessitating a greater understanding of how it interacts with its surroundings. Many bacteria utilize different methods of bacterial motility to move about and interact with these surroundings. A bacterial second messenger, cyclic diguanosine monophosphate (c-di-GMP), can regulate various motility factors that are potentially advantageous for survival in and adaptation to their environment. Concentrations of c-di-GMP are regulated by specific synthesizing and degrading enzymes. Controlled levels of c-di-GMP allow interaction between the c-di-GMP and its binding effectors that induce changes in bacterial phenotypes such as biofilm formation and motility. A …

Impact Of Sepsis Education For Emergency Department Staff: A Quality Improvement Project, Shayna E. Thoene, Shannon Mills

Doctor of Nursing Practice Projects: College of Nursing

Background: Sepsis continues to be a critical issue worldwide. New sepsis guidelines instituted by the Centers of Medicare and Medicaid Services (CMS) list evidence-based standards to comply with regarding care for sepsis patients. To help a new acute care facility meet compliance, a sepsis educational program has been developed to assess staff knowledge and confidence in caring for these patients.

Methods: This quality improvement (QI) project was developed using a pre-post study design to assess the impact of implementing a sepsis educational program for emergency department staff at this new acute care institution. A sepsis educational program was derived from …

The Physiological Significance Of Nitric Oxide Synthase In Staphylococci, Ryan M. Singh

Theses & Dissertations

Staphylococci, particularly Staphylococcus epidermidis, are common causes of implant-associated infections that may result in notable morbidity and mortality. One of the ways the innate immune system attempts to combat these invading pathogens is via the respiratory burst, in which free radical species such as nitric oxide (NO^•), toxic to bacterial respiration, are released in large quantities. Despite the toxicity of NO^•, some bacteria, including staphylococci, encode an endogenous bacterial nitric oxide synthase (bNOS), whose physiological role has been unclear until now. In this dissertation, we demonstrate that S. epidermidis is able to overcome the toxicity …

Investigating The Antibacterial Properties Of Capsaicin In Synergy With Antibiotics Against A. Baumannii, Jack Guffey

Undergraduate Theses

As the ever-increasing issue of antibiotic resistance looms, naturally derived compounds have been increasingly investigated as possible synergists with antibiotics. One of these compounds, capsaicin, is a potent vanilloid that is the dominant cause of Capsicum peppers’ spiciness. Capsaicin’s intrinsic ability to inhibit a wide array of bacterial growth has been well documented. The focal organism of this study, Acinetobacter baumannii, has become an increasingly common hospital acquired infection due to its persistence on fomites. Capsaicin, however, is able to inhibit this growth at higher concentrations as well as reduce the necessary minimum inhibitory concentration while decreasing biofilm formation …

A Meta-Analysis For Laboratory Diagnostics For Coccidioidomycosis, Mary C. Cowen

Biological Sciences Undergraduate Honors Theses

Coccidioidomycosis, commonly referred to as Valley Fever, is a fungal infection found in arid regions of the southwestern United States and Mexico. Infection occurs through inhalation of airborne spores from Coccidioides species, Coccidioides immitis and/or Coccidioides posadasii, and proceeds in both pulmonary and disseminated fashions. Approximately 60% of patients with coccidioidomycosis remain asymptomatic, while 40% will experience symptoms. Within the literature, there are no papers that summarize sensitivity and specificity values between different tests; therefore, this paper presents sensitivity and specificity results across different tests and companies (Meridian, IMMY, and MiraVista).

Targeting Coenzyme A Biosynthesis For Antifungal Development., Jessica Regan

Theses and Dissertations (ETD)

An estimated 1.5 million people die each year from invasive fungal infections (IFIs) involving dissemination to the deeper organs via the bloodstream, with estimated healthcare costs of over $7 billion in the U.S. alone. Collectively, several Candida species account for more than 75% of disseminated fungal infections in the U.S., with attributable mortality rates ranging 35-75%. Unfortunately, the prospect of curing these infections is limited by the modest efficacy of the available antifungal drugs: the azoles, echinocandins, and amphotericin B. Approximately one-third of patients with disseminated Candida infections are non-responsive to treatment with the azoles, and favorable response rates are …

Educating Nurses On Frequent Oral Care For Mechanically Ventilated Patients: An Evidence-Based Practice Project Proposal, Grace Alford, Susan Butz, Ruth Chavez, Joy Shoemaker

Doctor of Nursing Practice Scholarly Projects

The final scholarly project proposal is to implement oral care education for nurses in an intensive care unit (ICU). The proposal aims to create a guideline for an investigator to implement oral care recommendations for mechanically ventilated patients in order to reduce ventilator-associated pneumonia (VAP). The proposal consists of obtaining VAP data and oral care charting data for the unit studied, steps for providing oral care education, and analysis recommendations. Oral care involves swabbing the patient’s mouth every two hours with a swab and mouthwash. Oral care education would include handouts and direct teaching. The proposal aims to increase oral …

Exploration Of Enterococcus Faecalis Bacteriophages Diversity: Comprehensive Phylogenetic Analysis And Discovery Isolation Of Enterococcus Faecalis Phage From A Soil Sample In South Florida, Hailey N. Jauernick

All HCAS Student Capstones, Theses, and Dissertations

Enterococcus faecalis is a commensal bacterium found in the gastrointestinal tract, oral cavity, and vagina of humans, which can transition to pathogenic states, leading to diverse infections. Many E. faecalis infections are becoming progressively challenging to treat, stemming from the lack of effective antibiotic therapies against its virulence factors, including biofilm formation and antibiotic resistance. Phage therapy emerges as a promising alternative, targeting bacteria with minimal impact on host flora. However, despite phages' ubiquitous presence and potential applications in medicine and biotechnology, their diversity and ecological niches are vastly understudied. Here, we investigated the diversity of sequenced E. faecalis phages …

Microbial Profile And Antimicrobial Resistance Patterns Of Surgical Intra-Abdominal Infections At A Tertiary Hospital In Tanzania A Retrospective Cross-Sectional Study, Abduel Julius Kitua

Master of Surgery

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Among infections of surgical importance, intra-abdominal infections prevail among the most common in surgical patients with considerable morbidity and mortality. The ever-rising microbial resistance to commonly available antibiotics and geographical variations in microbial profile and resistance patterns poses a challenge to the management of these surgical infections of abdominal origin. The aim of this study was to evaluate microbiological characteristics and antibiotic susceptibility of isolates from intra-abdominal infections at a tertiary hospital in Tanzania and how these influence early treatment outcomes.

Managing Stress: A Study Of Stress Response Mechanisms In Mycobacteria, Augusto C. Hunt Serracin

Biology Dissertations - Archive

Mycobacteria encompass many pathogenic species known to cause severe disease in humans. A well-known example is Mycobacterium tuberculosis (Mtb), the causative agent of the lung disease tuberculosis, which kills millions of humans worldwide yearly. Pathogenic mycobacteria like Mtb are challenging to treat because of their innate ability to adapt to environmental stress. Their unique cell physiology and conserved stress responses allow them to combat biological insults, regulate growth, and regulate genes involved in stress; all these responses increase tolerance to antibiotics. The current therapies to treat mycobacterial infections are lengthy and, at times, unsuccessful, partly due to antibiotic tolerance. A …

Exploring The Physiology Of Clostridioides Difficile: Selenium-Dependent Catabolism Of Host-Derived Nutrients, Michael A. Johnstone

Graduate Thesis and Dissertation 2023-2024

Clostridioides difficile is a bacterial pathogen that causes pseudomembranous colitis and the majority of antibiotic-associated diarrheal cases. Broad-spectrum antibiotic usage disrupts the normal gut microbiota and thereby compromises colonization resistance, the main defense against C. difficile infection. Treatment options are limited to vancomycin, fidaxomicin, and the fecal microbiota transplant. Addressing the scarcity of these therapeutics, we documented two explorations in C. difficile drug discovery: (i) evaluation of antibacterial and toxin-suppressing activity of (+)-puupehenone and similar derivatives, and (ii) clarification of a discrepancy in the hypothesized mechanism of auranofin against C. difficile. A better understanding of how C. difficile colonizes …