Bacterial Infections and Mycoses Commons^™

Treating Cytokine Storm In Patients With Covid-19, Ahmed Abdelhaleem, Deekshitha Turaka, Shameera Shaik Masthan, Steven B Lippmann

The University of Louisville Journal of Respiratory Infections

No abstract provided.

Fusobacterium Necrophorum Septicemia Secondary To An Ovarian Abscess: A Case Report., Amanda Morrall, Uwe Schmidt

Ambulatory and Primary Care Articles

Fusobacterium necrophorum is part of the normal oropharyngeal flora and can result in a life-threatening systemic infection known as Lemierre's syndrome. A rare presentation of F. necrophorum infection is seen in the female genital tract and is typically due to obstetric infections. Here we present a unique case of F. necrophorum without traditional features of Lemierre's syndrome with the female genital tract as a primary site. A 50-year-old female presents with a two-month history of nausea, vomiting, abdominal pain, and weight loss. She ultimately developed bilateral lower extremity necrotizing fasciitis, colonic perforation, and a left chest wall abscess. Blood and …

Effect Of Sub-Inhibitory Concentrations Of Nitrofurantoin, Ciprofloxacin And Trimethoprim On In-Vitro Biofilm Formation In Uropathogenic Escherichia Coli, Shane Whelan

ORBioM (Open Research BioSciences Meeting)

The purpose of the current study was to determine the effect of sublethal concentrations of nitrofurantoin, ciprofloxacin and trimethoprim on biofilm formation in 57 uropathogenic Escherichia coli strains (UPEC).

The MIC of nitrofurantoin, ciprofloxacin and trimethoprim was determined for 57 UPEC isolates. Biofilm formation for each isolate with and without sub-lethal concentrations of each antibiotic was then quantified, and the statistical significance of changes in biofilm formation was ascertained by way of a Dunnett's test.

The effects of sub-MIC antibiotics on biofilm formation of UPEC were variable. A total of 22.8% of strains were induced to form biofilm by nitrofurantoin, …

Staph Infection: Hospitals Battle Against A Deadly Menace, Mckenzie Lamos

Undergraduate Research Symposium

Staph infection is caused by the staphylococcus bacteria, which is found on the skin or within the nose of even healthy individuals. This bacteria is usually harmless, but deadly infectious diseases may arise when it enters deep within the body. Staph infection is commonly treated with antibiotics, however the methicillin-resistant Staphylococcus aureus (MRSA) strain is resistant to antibiotics which further complicates treatment. This research provides insight on preventative measures to stop and slow the spread of staph infection in hospitals, along with what is being done to limit the number of MRSA infections. The CDC and NCBI both outline strategies …

Resolving The Repression Pathway Of Virulence Gene Hila In Salmonella, Alexandra King, Lon Chubiz Phd, Brenda Pratte, Lauren Daugherty

Undergraduate Research Symposium

Salmonella is a relatively abundant, virulent species of bacteria that is most known for spreading gastrointestinal diseases through food. These illnesses result in approximately 1.35 million infections, including over 25,000 hospitalizations each year, in the U.S. alone (CDC.gov). As antibiotic resistance becomes an increasingly urgent public health problem, the importance of developing alternative treatment methods is only becoming more crucial. One of the genes responsible for this virulence is known as hilA. HilA is the main transcriptional regulator of Salmonella Pathogenicity Island-1 gene (UniProt). SPI-1 plays an important role in the invasion of Salmonella into epithelial cells. The proteins encoded …

Host-Pathogen Interactions During Leptospirosis In Male C3h/Hej Mice, Advait Bhaskar Shetty

Theses and Dissertations (ETD)

Leptospirosis is a zoonotic disease transmitted from reservoir hosts like rodents to other animals and humans, who are incidental hosts. This infection is prevalent in the areas of Southeast Asia, Africa and South America. Inactivated Leptospira serovars vaccines are available in endemic areas but they have certain limitations such as serovar specificity and short-term protection. Antibiotics are effective treatment strategies useful at least during early stages of infection. Early diagnosis of Leptospirosis is difficult due to lack of accessible laboratory and point of care tests and due to clinical similarities with other diseases. Thus, it is important to understand host-Leptospira …

Noninvasive Testing And Surrogate Markers In Invasive Fungal Diseases, George R Thompson, David R Boulware, Nathan C Bahr, Cornelius J Clancy, Thomas S Harrison, Carol A Kauffman, Thuy Le, Marisa H Miceli, Eleftherios Mylonakis, M Hong Nguyen, Luis Ostrosky-Zeichner, Thomas F Patterson, John R Perfect, Andrej Spec, Dimitrios P Kontoyiannis, Peter G Pappas

Faculty, Staff and Student Publications

Invasive fungal infections continue to increase as at-risk populations expand. The high associated morbidity and mortality with fungal diseases mandate the continued investigation of novel antifungal agents and diagnostic strategies that include surrogate biomarkers. Biologic markers of disease are useful prognostic indicators during clinical care, and their use in place of traditional survival end points may allow for more rapid conduct of clinical trials requiring fewer participants, decreased trial expense, and limited need for long-term follow-up. A number of fungal biomarkers have been developed and extensively evaluated in prospective clinical trials and small series. We examine the evidence for these …

Antimicrobial Stewardship Meets Transitions Of Care: Defining Length Of Therapy For Community-Acquired Pneumonia (Cap), Christopher Whitman, Sarah E. Moore, Matthew Song, Brian C. Bohn, Ashley M. Wilde

The University of Louisville Journal of Respiratory Infections

Introduction: Hospital-based antimicrobial stewardship efforts have traditionally focused on inpatient settings. Antibiotic prescribing at discharge is often an overlooked area of focus for antimicrobial stewardship programs. Discharge prescribing optimization is necessary to combat antibiotic overuse.

Methods: This was an observational, retrospective cohort study at a four–adult community hospital system. Four hundred adult patients admitted with community-acquired pneumonia and discharged with antibiotics were included. The primary outcome was overall (inpatient and discharge) antibiotic length of therapy. The secondary outcome was percentage of patients discharged on a fluoroquinolone who had not received one in the hospital. Descriptive statistics were utilized.

Results: The …

Covid-19 Case Complicated With Organizing Pneumonia And Pneumothorax: Correspondence, Hammad A. Bhatti, Minh Q. Ho

The University of Louisville Journal of Respiratory Infections

No abstract provided.

Updates In The Pharmacologic Prophylaxis And Treatment Of Invasive Candidiasis In The Pediatric And Neonatal Intensive Care Units, James Hunter Fly, Seerat Kapoor, Kelly Bobo, Jeremy S. Stultz

Faculty Publications

Purpose of review The goal of this review was to provide an update on the prevention and treatment options for invasive candidiasis (IC) in the neonatal intensive care unit (NICU) and pediatric intensive care unit (PICU).

Recent findings Studies have further validated the use of fluconazole for IC prophylaxis among high-risk patients in the NICU. It remains unclear if prophylaxis leads to resistance development and the ideal dosage regimen is still not clear. Recent studies have been published comparing caspofungin and micafungin to amphotericin B and illustrated similar efficacy outcomes in the NICU. Micafungin now has approval from the United …

Eskape Pathogens: The Clinical Prevalence And Molecular Mechanisms Of Antibiotic Resistance, Anusha Attre

Honors Scholar Theses

The ESKAPE pathogens (Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species) are the leading cause of all nosocomial, or healthcare-associated (HAI), infections (Navidinia, 2016). The purpose of this research study is to determine the burden of ESKAPE infections on healthcare and study the antibiotic resistance in these high-risk pathogens to provide direction for researchers to develop new antimicrobial innovations to reduce ESKAPE infectivity and improve patient outcomes. To study the burden of ESKAPE infections, this review analyzes the current statistics explaining the clinical prevalence of each pathogen in causing HAIs. Additionally, each pathogen is …

Creating A Guideline For Sti Testing In The Pediatric Population, Alexandria Molaro, Alexandra Evans, Alex Niebrugge

Doctor of Nursing Practice Projects

Sexually transmitted infection (STI) prevention, education, screening, and management in pediatric primary care settings are of importance due to the increasing number of cases yearly. Almost half of the 26 million new STIs that occurred in 2018 were among young people 15-24. An opportunity existed in a rural pediatric primary clinic, for improved adherence to Centers for Disease Control and Prevention (CDC) or American Academy of Pediatrics (AAP) recommendations to screen/test patients. An evidence-based project (EBP) was developed to address this concern. Project objectives included: developing STI screening guidelines for pre-teen to young adults, developing a screening algorithm, providing alternative …

Safety And Efficacy Of Silver-Coated Biomaterials In Vivo, Megan Klem, Darien L. Seidman, Rahyan Mahmoud, Manuella Adu, Lei Yu, Jeffrey Hettinger, Renee M Demarest

Rowan-Virtua Research Day

Overtreatment and overuse of antibiotics in healthcare and agricultural settings have contributed to the selective pressure on bacterial strains to develop resistance. Resistance can develop as a result of mutations and subsequent resistance genes that allow bacteria to survive against antibiotics. Novel silver-oxide coatings were developed and were previously demonstrated to prevent adhesion of gram-negative bacteria (Escherichia Coli and Pseudomonas Aeruginosa) to the disc, but did not prevent gram-positive bacterial adherence (Streptococcus Aureus). In order to determine whether the silver-oxide coatings are bacterial static and may be preventing progression to biofilm formation, in vivo analysis of S. Aureus attached to …

A Case Of Intracranial Empyema After Bacterial Sinusitis, Eric Doane, Bhumi Shah, Robert Belfer

Rowan-Virtua Research Day

Acute sinusitis in the pediatric population is a common presentation in the emergency department. Most cases are viral and can be managed conservatively and will resolve spontaneously in 7-10 days. Even in cases of bacterial sinusitis, patients can typically be discharged with oral antibiotics and close follow up with the pediatrician.

There is however a small subset of patients who will develop a rare lethal complication, an intracranial empyema. While the incidence in the developed world has decreased as antibiotics become more available, it is still estimated to occur in up to 5% of severe cases requiring hospitalization (1) . …

The Cloak Of Invisibility: Subclinical Infective Endocarditis Resulting In Chordae Tendineae Rupture In Mitral Valve Prolapse, Jason Naftulin, Trinava Roy, Anjeli Patel, Steven Silver

Rowan-Virtua Research Day

While Chordae tendineae rupture(CTR) is often caused due to mitral valve prolapse, rheumatic heart disease or infective endocarditis, CTR secondary to a combination of the factors is not often seen. We present a unique case of CTR due to subclinical infective endocarditis(IE) with underlying mitral valve prolapse(MVP).

Covid-19, Vaccination, And Heart Transplantation, Forest W. Arnold

The University of Louisville Journal of Respiratory Infections

No abstract provided.

Diagnosis, Management, And Treatment Of Lymphadenitis And Deep Neck Space Infections At A Children’S Hospital, Aaron Shaw

Research Days

Background: Although cervical lymphadenitis and deep neck space abscesses (DNSA) are relatively common pediatric diagnoses, no standardized approach exists for management of these infections.

Objectives/Goal: To assess variability in diagnosis and treatment of cervical lymphadenitis and DNSA in a children’s hospital.

Methods/Design: Charts were obtained using ICD9/10 codes for diagnoses of retropharyngeal and parapharyngeal abscess, and lymphadenitis between 1/1/10-12/31/20. 1,237 charts were identified. Patients with a retropharyngeal and/or parapharyngeal abscess were defined as DNSA. Charts were excluded if the diagnosis was not a bacterial infection (e.g. Kawasaki disease), if the lymphadenitis was not in the neck, or if caused by …

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

Graduate Theses and Dissertations

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

Porphyromonas Gingivalis, Ethanol, And Chronic Diseases., Nicholas Alan Short

Electronic Theses and Dissertations

This dissertation is an investigation into the relationships among Porphyromonas gingivalis, ethanol, and a series of chronic diseases, focusing primarily on atherosclerosis. It uses evolutionary theory to understand clinical parameters related to chronic disease biology. The initial research question was, "If people who drink a glass of wine each day have a lower risk for atherosclerosis, could one explanation involve antibacterial effects on pathogens associated with causing atherosclerosis, namely, Porphyromonas gingivalis?". This dissertation is divided into four chapters. Chapter One provides the foundational information pertinent to the dissertation. Chapter Two describes an in- vitro experiment aimed at understanding …

Time Course Investigation Of The Dermal Leukocyte Response To Lipoteichoic Acid In Chickens, Ian Gilbert

Animal Science Undergraduate Honors Theses

Lipoteichoic acid (LTA) is component of the cell wall of Gram-positive bacteria that stimulates inflammation during bacterial infection. However, few studies have investigated the in vivo immune response to LTA, and none of the in vivo studies done have been performed in birds. For this project, the pulp (a skin-derivative) of growing feathers (GFs) of chickens were used as a test site to investigate the in vivo effects of intradermally injected LTA. In Study 1, the pulp of 12 GFs of 11-week-old Light-brown Leghorn (LBL) males were injected with 10 μL of differing concentrations of LTA (0.1, 1.0, 10, 100 …