Medicine and Health Sciences Commons^™

Antimicrobial Activity Of Bacterial Virus Components: An Empirical Investigation Of The Killing Capacity Of Toxins From Burkholderia, Kyle Walny

Honors Projects

Given the growing issue in healthcare of antibiotic resistance, effective and safe alternative treatment methods are required. One of these possible alternative treatment methods is bacteriotoxins including bacteriocins and tailocins. The focus of this study is a bacteriotoxin from Burkholderia cenocepacia (ATCC 25608), which was induced for toxin using a modified UV light induction procedure and tested against a variety of Pseudomonas and Burkholderia for its killing capacity. Various other pathogenic strains were then induced with UV light and tested. The results showed that the toxin from ATCC 25608 was very effective against most of the Burkholderia tested and warrants …

The Interactions Between Oral Biofilms, Antibiotic Resistance, And Dentistry, Maxine Taylor

Honors Projects

Antibiotic resistance is a pressing concern that demands further action to reduce and develop new countermeasures. Antibiotic resistance impacts all fields of health and medicine, including dentistry. Many of the preventive and restorative dental procedures are due to a bacterial cause. Knowledge of oral biofilm development mechanisms and the interactions and relationships between oral microbiota is necessary to combat the spread of antibiotic resistance and develop more effective dental treatments. Exploring how the oral microbiomes and their treatments impact the health of the rest of the body is another important consideration since dentistry is part of the general healthcare system. …

Knowledge, Attitude, And Practice Towards Antibiotic Use Among Lebanese Health Professions Students: A Multicentre Cross-Sectional Study, Rayan Damer, Hiyam Kojok, Nada El Darra, Fatima Saleh

BAU Journal - Health and Wellbeing

Antibiotic resistance poses a great threat to the public health at a global scale. This resistance has emerged due to the misuse and overuse of antibiotics, especially in countries where antibiotics are dispensed without a prescription. The aim of this study was to evaluate knowledge, behavior and practice towards antibiotics among medical students in universities. The study is a cross sectional survey using questionnaire. Data were collected from a random sample of 226 students of two faculties pharmacy and health sciences. Results showed good knowledge of participants since 87.6% had more than 50% correct answers. 47% of physicians prescribe antibiotics …

Concordance Between Antibiotic Resistance Genes By Multiplex Polymerase Chain Reaction And Antibiotic Susceptibility By Pooled Antibiotic Sensitivity Testing In Symptomatic Patients With Urinary Tract Infection, Annah Vollstedt, Dakun Wang, Natalie Luke, David Baunoch, Kirk J. Wojno, Howard Korman, Natalie Gaines, Shuguang Huang, S Mohammad Jafri, David Wenzler, Patrick Cacdac, Frank Burks, Larry Sirls

Conference Presentation Abstracts

Introduction: Studies have shown many genes influence antibiotic resistance, and the relationship between genotypic and phenotypic antibiotic resistance is unclear. We sought to analyze the concordance between the presence of antibiotic resistance (ABR) genes and antibiotic susceptibility results. Methods: Urine samples were collected from patients presenting with possible UTI to 37 Urology clinics from July 2018 to February 2019. Multiplex polymerase chain reaction (M-PCR) was used to test for 33 ABR genes. Pooled Antibiotic Susceptibility Testing (P-AST) was performed against 14 different antibiotics. The concordance rate between the ABR genes and P-AST results was generated. The concordance rates for each …

Characterization Of Gut Microbiome And Metabolome In Helicobacter Pylori Patients In An Underprivileged Community In The United States, Brian White, John Sterrett, Zoya Grigoryan, Lauren Lally, Jared Heinze, Hyder Alikhan, Christopher Lowry, Lark Perez, Joshua Desipio, Sangita Phadtare

Division of Internal Medicine Faculty Papers & Presentations

BACKGROUND Helicobacter pylori (H. pylori), a bacterium that infects approximately half of the world's population, is associated with various gastrointestinal diseases, including peptic ulcers, non-ulcer dyspepsia, gastric adenocarcinoma, and gastric lymphoma. As the burden of antibiotic resistance increases, the need for new adjunct therapies designed to facilitate H. pylori eradication and reduce negative distal outcomes associated with infection has become more pressing. Characterization of the interactions between H. pylori, the fecal microbiome, and fecal fatty acid metabolism, as well as the mechanisms underlying these interactions, may offer new therapeutic approaches.

AIM To characterize the gut microbiome and metabolome in H. …

Assesment Of Antibiotic Resistant Gene Expression In Clinical Isolates Of Pseudomonas Aeruginosa, Dustin Esmond

Biology Theses

Increasing prevalence of nosocomial infections by antimicrobial resistant pathogens resulting in higher mortality rates and financial burden is of great concern. Pseudomonas aeruginosa represents one of six highly virulent “ESKAPE” pathogens that exhibit considerable intrinsic drug resistance as well as mechanisms for acquiring further resistance. As many of these mechanisms are regulated through gene expression, we sought to identify regulatory strategies and patterns at play in 23 clinical isolates collected from Baku, Azerbaijan and Tyler, Texas, USA. Real-time quantitative polymerase chain reaction was performed on six gene targets implicated in resistance and contrasted with antibiotic phenotypes. We found AmpC cephalosporinase …

Targeting Modern Pathogens With Rational Drug Design, Michael Dominic Sacco

USF Tampa Graduate Theses and Dissertations

Since the first living organisms appeared on earth, their very existence was dependent on their ability to contend for resources. To this day, organisms are perpetually competing for resources, and in doing so, have evolved highly effective defense mechanisms and systems for propagation. Although invisible to the eye, we live in a world teeming with microbes and viruses. While many are harmless, others cause widespread disease. One of the key niches for these pathogens, particularly bacteria, are health-care facilities. These health-care facilities have a high concentration of immunocompromised patients and rely heavily on antibiotics, which strongly contributes to antibiotic resistance. …

Accumulation Of Succinyl Coenzyme A Perturbs The Methicillin-Resistant Staphylococcus Aureus (Mrsa) Succinylome And Is Associated With Increased Susceptibility To Beta-Lactam Antibiotics, Christopher Campbell, Claire Fingleton, Merve S. Zeden, Emilio Bueno, Laura A Gallagher, Dhananjay Shinde, Jong-Sam Ahn, Heather M. Olson, Thomas L. Fillmore, Joshua N. Adkins, Fareha Razvi, Kenneth W. Bayles, Paul D. Fey, Vinai Chittezham Thomas, Felipe Cava, Geremy C. Clair, James P. O'Gara

Journal Articles: Pathology and Microbiology

Penicillin binding protein 2a (PBP2a)-dependent resistance to β-lactam antibiotics in methicillin-resistant Staphylococcus aureus (MRSA) is regulated by the activity of the tricarboxylic acid (TCA) cycle via a poorly understood mechanism. We report that mutations in sucC and sucD, but not other TCA cycle enzymes, negatively impact β-lactam resistance without changing PBP2a expression. Increased intracellular levels of succinyl coenzyme A (succinyl-CoA) in the sucC mutant significantly perturbed lysine succinylation in the MRSA proteome. Suppressor mutations in sucA or sucB, responsible for succinyl-CoA biosynthesis, reversed sucC mutant phenotypes. The major autolysin (Atl) was the most succinylated protein in the proteome, …

Type I Topoisomerases As Potential Targets For Therapeutics, Ahmed Seddek

FIU Electronic Theses and Dissertations

DNA topoisomerases are universal enzymes that control the topological features of DNA in all forms of life. This study aims to find potential inhibitors of some of the DNA topoisomerases in bacteria and humans that can be developed into potential therapeutics.

The first aim of this study is to find potential inhibitors of bacterial topoisomerase I that can be developed into antibiotics. There is an urgent need to develop novel antibiotics to overcome the world-wide health crisis of antimicrobial resistance. Virtual screening and biochemical assays were combined to screen thousands of compounds for potential inhibitors of bacterial topoisomerase I. NSC76027 …

Antibiotic Tolerance And Heteroresistance: Associated Fitness Costs And Potential In Evading Antibiotic Killing, Tina H. Dao

Theses and Dissertations (ETD)

Streptococcus pneumoniae is a prominent human pathogen that causes both invasive and non-invasive diseases, such as otitis media, pneumonia, meningitis, and bacteremia. Although it is frequently an asymptomatic colonizer of the human nasopharynx, S. pneumoniae is a major cause of morbidity and mortality in the immune compromised population, young children, and the elderly. Up until the 1970s, S. pneumoniae was susceptible to almost all antibiotics. Since then, this pathogen has gained resistance to a variety of antibiotic treatments, including beta-lactams, macrolides, and fluoroquinolones.

In the first chapter, we focused on fluoroquinolone resistance in S. pneumoniae. Fluoroquinolones are one of the …

Exploring Antibiotic Resistance And The Effect Of Antimicrobial Stewardship On Physicians’ And Non-Physician Prescribing Clinicians Through Knowledge, Attitudes, Practices And Beliefs (Kapb) Utilizing The Social Cognitive Theory (Sct), Tamika Carty

Seton Hall University Dissertations and Theses (ETDs)

ABSTRACT

Exploring Antibiotic Resistance and the Effect of Antimicrobial Stewardship on Physicians’ and Non-Physician Prescribing Clinicians through Knowledge, Attitudes, Practices and Beliefs (KAPB) Utilizing the Social Cognitive Theory (SCT)

Tamika Carty

Seton Hall University, 2021

Dissertation Chair: Genevieve Pinto Zipp, PT, EdD, FNAP

Background: Antibiotics are one of the greatest medical discoveries, revolutionizing the field of medicine. However, antimicrobial and antibiotic over usage has become a prevalent issue among outpatients, leading to antibiotic resistance (AR) (Ventola, 2015). As a result of, its widespread usage and associated concerns, the World Health Organization (WHO) has cited AR as a growing concern for …

Gut Reactions: Quantitative Predictions Of The Responses Of Human Gut Microbiota To Medical Interventions, Amy Elizabeth Langdon

Arts & Sciences Electronic Theses and Dissertations

The collection of microbes known as the human microbiome perform vital functions for their host, and when this community becomes unhealthy, its dysbiosis is implicated in a myriad of diseases. The gut microbiota in particular are known to suppress colonization of opportunistic pathogens, regulate the immune system, aid in nutrient breakdown, produce vitamins, and a growing number of other functions. In order to intervene in a dysbiotic microbial ecology, we can try to remove unwanted microbes or try to recolonize the gut with microbes expected to be beneficial. This dissertation provides an overview of the state of medical interventions for …

Case Study Of Nursing Home Residents: The Association Between Carbapenemase-Producing Enterobacteriaceae (Cpe) And Covid-19, Jordan Ranta

Capstone Experience

None

Deciphering The Mechanisms Of Alcaligenes Faecalis’ Inhibition Of Staphylococcus Aureus And Synergism With Antibiotics, Cortlyn Holdren

Undergraduate Honors Theses

Staphylococcus aureus has developed resistance to several antibiotics including vancomycin, which is often used as a “last resort” treatment. There is an ever-increasing need to develop novel antimicrobial treatments to combat S. aureus and other drug resistant bacteria. Microorganisms are most often found in polymicrobial communities where they either exhibit synergistic or antagonistic relationships. Competition between microorganisms can lead to the discovery of new antimicrobial targets as the specific mechanisms of resistance are elucidated. In addition, synergistic treatments are being evaluated for their combined effect and potential to decrease the concentration of drugs needed, and thus the side effects also. …

The Migration Of Carbapenem-Resistant Acinetobacter Baumannii From The Battlefields Of Iraq And Afghanistan To The Healthcare Facilities Of The Veterans Health Administration, Jeffery Rogers

Capstone Experience

Multidrug-resistant organisms (MDRO) pose a great threat to health across the globe. That threat is also felt in the Veterans Health Administration (VHA). Wounded warriors returning home from the battlefields of Iraq and Afghanistan may have brought with them MDROs, such as the bacterium Acinetobacter baumannii, as they have transitioned from military service into the VHA facilities. This study investigates the interconnectedness of military service in the Department of Defense (DoD) and a lifetime of care at VHA through a longitudinal tracking of a linked cohort of combat veterans with battlefield injuries and subsequent MDR infections of A. baumannii. …

Talking To Your Patients About Antibiotics: What Nurse Practitioners Need To Know, Danae M. Titensor, Katreena Collette-Merrill

Student Works

Antibiotic resistance is a growing threat to our current ways of treating infections. The overuse of antibiotics is a major contributor to this threat, especially with the prevalence of unnecessary prescriptions written for upper respiratory infections (URIs). Better education tools are needed for providers and patients regarding antibiotic resistance. The purpose of this project was to use evidence-based practice to produce an educational video about antibiotic resistance. Following a review of the literature, a 6-minute video was made using Mayer’s cognitive theory of multimedia learning. A convenience sample of 15 family nurse practitioner (FNP) students, from one master’s program, participated …

Detection Of Oxa-23, Ges-11 And Ndm-1 Among Carbapenem-Resistant Acinetobacter Baumannii In Dubai: A Preliminary Study, Carole Ayoub Moubareck, Dalal Hammoudi Halat, Anju Nabi, Mouza A. Alsharhan, Zulfa O. Aldeesi, Aaron Han, Handan Celiloglu, Dolla Karam Sarkis

All Works

No abstract provided.

Concordance Between Antibiotic Resistance Genes By Multiplex Polymerase Chain Reaction And Antibiotic Susceptibility By Pooled Antibiotic Sensitivity Testing In Symptomatic Patients With Urinary Tract Infection, Annah Vollstedt, Dakun Wang, Natalie Luke, David Baunoch, Kirk J. Wojno, Kevin Cline, Natalie Gaines, Howard Korman, S Mohammad Jafri, David Wenzler, Frank Burks, Larry Sirls

Conference Presentation Abstracts

Introduction: Studies have shown many genes influence antibiotic resistance, and the relationship between genotypic and phenotypic antibiotic resistance is unclear. We sought to analyze the concordance between the presence of antibiotic resistance (ABR) genes and antibiotic susceptibility results in urine samples collected from symptomatic UTI patients. Methods: Urine samples were collected from patients presenting with possible UTI to 37 geographically disparate Urology clinics from July 2018 to February 2019. Multiplex polymerase chain reaction (M-PCR) was used to test for 33 different ABR genes. Samples in which at least one organism was identified at a quantity of ≥104 cells per mL, …

Concordance Between Antibiotic Resistance Genes By Multiplex Polymerase Chain Reaction And Antibiotic Susceptibility By Pooled Antibiotic Sensitivity Testing In Symptomatic Patients With Urinary Tract Infection, Annah Vollstedt, Dakun Wang, Natalie Luke, David Baunoch, Kirk J Wojno, Kevin Cline, Natalie Gaines, Howard Korman, S Mohammad Jafri, David Wenzler, Frank Burks, Larry Sirls

Conference Presentation Abstracts

Introduction: Studies have shown many genes influence antibiotic resistance, and the relationship between genotypic and phenotypic antibiotic resistance is unclear. We sought to analyze the concordance between the presence of antibiotic resistance (ABR) genes and antibiotic susceptibility results in urine samples collected from symptomatic UTI patients. Methods: Urine samples were collected from patients presenting with possible UTI to 37 geographically disparate Urology clinics from July 2018 to February 2019. Multiplex polymerase chain reaction (M-PCR) was used to test for 33 different ABR genes. Samples in which at least one organism was identified at a quantity of ≥104 cells per mL, …

J Mich Dent Assoc February 2021

The Journal of the Michigan Dental Association

Every month, The Journal of the Michigan Dental Association brings news, information, and features about Michigan dentistry to our state's oral health community and the MDA's 6,200+ members. No publication reaches more Michigan dentists!

In this issue, the reader will find the following original content:

• A feature article on “Pediatric Dentistry: Care for Our Youngest Patients in the Challenging Time”.
• A feature article, “The Hall Technique: A Minimally Invasive, Non-aerosol Approach for the Decayed Primary Molar”.
• The feature article, “Delayed Antibiotic Prescribing: A Simple Strategy to Promote Antibiotic Stewardship”.
• ”Dentistry and the Current State of the Opioid Epidemic in Michigan”, …

Heeding The Call Of Covid-19, David Wiebers, Valery Feigin

Animal Sentience

We are grateful to all of our commentators. They have provided a wide range of valuable perspectives and insights from many fields, revealing a broad interest in the subject matter. Nearly all the commentaries have helped to affirm, refine, expand, amplify, deepen, interpret, elaborate, or apply the messages in the target article. Some have offered critiques and suggestions that help us address certain issues in greater detail, including several points concerning industrialized farming and the wildlife trade. Overall, there is great awareness and strong consensus among commentators that any solution for preventing future pandemics and other related health crises must …

Understanding Of Pharmacy Students Towards Antibiotic Use, Antibiotic Resistance And Antibiotic Stewardship Programs: A Cross-Sectional Study From Punjab, Pakistan, Khezar Hayat, Shazia Jamshed, Meagen Rosenthal, Noman Ul Haq

Faculty and Student Publications

Antibiotic resistance (ABR) is a significant issue for public health globally. An adequate understanding of ABR and the approaches used to tackle ABR, including antibiotic stewardship programs, are vital. This study aimed to get an insight into antibiotic use, ABR, and antibiotic stewardship programs among pharmacy students of Punjab, Pakistan. This multicenter study was undertaken among final (fifth) year undergraduate pharmacy students of 7 universities of Punjab, Pakistan. A paper-based self-administered questionnaire comprising 48-items was utilized for data collection. Descriptive and inferential statistics were employed for data analysis. This study included a total of 296 respondents with a response rate …

Delineating The Biosynthesis Of Capuramycin-Type Antibiotics, Ashley L. Biecker

Theses and Dissertations--Pharmacy

New antibiotic scaffolds with novel drug targets are needed to combat the rise of drug-resistant, infectious microorganisms. The bacterial translocase I is a ubiquitous enzyme in the peptidoglycan biosynthetic pathway that has yet to be targeted by clinically used antibiotics. It catalyzes the transfer of N-acetylmuramoyl-pentapeptide to undecaprenylphosphate in order to generate lipid I during cell wall biosynthesis. A screening of bacterial translocase I inhibitors led to the discovery of the novel compound capuramycin and its analogues: A-500359s, A-503083s, and A-102395, produced by various species of actinomycetes. The capuramycins show potent activity against the bacterial translocase I with IC50s …

Evidence For Continental-Scale Dispersal Of Antimicrobial Resistant Bacteria By Landfill-Foraging Gulls, Christina A. Ahlstrom, Mariëlle L. Van Toor, Hanna Woksepp, Jeffrey C. Chandler, John A. Reed, Andrew B. Reeves, Jonas Waldenström, Alan B. Franklin, David C. Douglas, Jonas Bonnedahl, Andrew M. Ramey

USDA Wildlife Services: Staff Publications

Anthropogenic inputs into the environment may serve as sources of antimicrobial resistant bacteria and alter the ecology and population dynamics of synanthropic wild animals by providing supplemental forage. In this study, we used a combination of phenotypic and genomic approaches to characterize antimicrobial resistant indicator bacteria, animal telemetry to describe host movement patterns, and a novel modeling approach to combine information fromthese diverse data streams to investigate the acquisition and long-distance dispersal of antimicrobial resistant bacteria by landfill-foraging gulls. Our results provide evidence that gulls acquire antimicrobial resistant bacteria from anthropogenic sources, which they may subsequently disperse across and between …

Differing Alterations Of Odor Volatiles Among Pathogenic Stimuli, Patrick Millet, Talia Martin, Maryanne Opiekun, Gary K. Beauchamp, Bruce A. Kimball

USDA Wildlife Services: Staff Publications

Alterations of the volatile metabolome (the collection of volatiles present in secretions and other emanations) that occur in response to inflammation can be detected by conspecifics and chemometric analyses. Using a model system where mouse urinary metabolites are altered by treatment with lipopolysaccharide (found in the outer cell membrane of gram-negative bacteria), we hypothesized that alteration of body odor volatiles will vary according to the pathogen responsible for inducing the inflammation. We tested this hypothesis by treating mice with different immunogens that engage different immune signaling pathways. Results suggest that alterations of body odor volatiles resulting from inflammation do contain …

Microevolution In Staphylococcus Aureus: Does Exposure To Sub-Lethal Levels Of Cinnamon Bark Oil Lead To Changes In Antimicrobial Susceptibility?, Heather Sandra Schuettner

Graduate College Dissertations and Theses

The emergence of antibiotic-resistant and multi-drug resistant bacteria presents a growing global health issue recognized by the World Health Organization and the Centers for Disease Control and Prevention. Infections caused by drug-resistant bacteria are associated with longer hospital stays, higher treatments costs, and increased mortality compared to infections caused by antibiotic-susceptible pathogens. The global increase in antibiotic resistance is driven in part by the misuse and overuse of antibiotics in healthcare and agriculture. Staphylococcus aureus can infect humans and animals, and strains that are resistant to one or more antibiotics are common. Many plant essential oils have antimicrobial properties. Essential …

Microevolution In Staphylococcus Aureus: Does Exposure To Sub-Lethal Levels Of Cinnamon Bark Oil Lead To Changes In Antimicrobial Susceptibility?, Heather Sandra Schuettner

Graduate College Dissertations and Theses

The emergence of antibiotic-resistant and multi-drug resistant bacteria presents a growing global health issue recognized by the World Health Organization and the Centers for Disease Control and Prevention. Infections caused by drug-resistant bacteria are associated with longer hospital stays, higher treatments costs, and increased mortality compared to infections caused by antibiotic-susceptible pathogens. The global increase in antibiotic resistance is driven in part by the misuse and overuse of antibiotics in healthcare and agriculture. Staphylococcus aureus can infect humans and animals, and strains that are resistant to one or more antibiotics are common. Many plant essential oils have antimicrobial properties. Essential …