A Platform For The Discovery And Characterization Of Proteins That Associate With Pseudomonas Aeruginosa Rna Polymerase, 2017 Northern Michigan University
A Platform For The Discovery And Characterization Of Proteins That Associate With Pseudomonas Aeruginosa Rna Polymerase, Danielle N. Brogren, Danielle N. Brogren
All NMU Master's Theses
Pseudomonas aeruginosa is an opportunistic bacterial pathogen notable for its ability to colonize the lungs of cystic fibrosis patients. Once the bacterium infects and colonizes humans, it is extremely difficult to eradicate. This leads to long-term infections that significantly damage the lungs and other tissues. P. aeruginosa infections are challenging to treat due to the bacterium’s natural antibiotic resistance and the rise of multidrug resistant strains. Development of novel drug treatments are a necessity.
In all organisms, the regulation of gene expression is a highly controlled process. Remarkably, in P. aeruginosa bioinformatics studies showed that 20% of its genome ...
Circling The Drain: Regulating Nutrient Pollution From Agricultural Sources, 2017 Cleveland-Marshall College of Law, Cleveland State University
Circling The Drain: Regulating Nutrient Pollution From Agricultural Sources, William Gutermuth
Journal of Law and Health
The 2014 Toledo, Ohio tap water ban has, at least temporarily, put a spotlight on United States water supplies. Consequently, many Americans have begun to take a closer look at the quality of the fresh water bodies being used to supply tap water to their homes. Therefore, this Note analyzes the problems currently threatening the lakes, rivers, and other surface waters that are the source of fresh drinking water for huge populations in the United States. Part II examines the problem of nutrient pollution and explains the harmful effects it has on human health. Part III provides an overview of ...
Procalcitonin Levels; An Alternative Diagnostic Approach For Community Acquired Pneumonia In Acute Care Settings And Determination Of Antibiotic Therapy, Jamie Anne Rhodine
Honors Theses AY 16/17
Procalcitonin (PCT) levels are an accurate reflection of bacterial replication within the human body. By deciphering between bacterial and viral invasion, antibiotic therapy will be reduced contributing to the reduction of antibiotic resistance. For atypical patients with community acquired pneumonia (CAP), PCT levels will detect when antibiotic therapy is effective and when it is safe to discontinue antibiotics. Hospital stay length will be reduced and patients to nurse ratios will improve. One simple diagnostic PCT test used as an adjunct with traditional diagnostic testing for CAP will help minimize morbidity and mortality rates among patients. Traditionally used with septic patients ...
Lymphoid Hematopoiesis And The Role Of B-Cells In Transgenic Mouse Model Of Sickle Cell Disease, 2017 University of Connecticut - Storrs
Lymphoid Hematopoiesis And The Role Of B-Cells In Transgenic Mouse Model Of Sickle Cell Disease, Christina Cotte
University Scholar Projects
Sickle cell disease (SCD) has been shown to be associated with decreased baseline immunity and thus increased susceptibility to infection. I sought to discern possible causes of this by looking into the correlations between SCD and hematopoiesis, the immune system and the neuroendocrine system, and ultimately by conducting experiments surrounding the impaired immune system of SCD. These experiments focused on the potential causes and effects of the diminution of B-1a cells in the SCD spleen. Adoptive transfers, infections with Streptococcus pneumoniae, and histologic imaging were conducted to establish if the diminution of the B-1a cells in the SCD spleen is ...
F. Psychrophilum Resistant And Susceptible Rainbow Trout Show Differences In Abundance Of Igt+ And Igm+ B Cells, 2017 College of William and Mary
F. Psychrophilum Resistant And Susceptible Rainbow Trout Show Differences In Abundance Of Igt+ And Igm+ B Cells, Erin Hennessey
Undergraduate Honors Theses
Rainbow trout are heavily affected by Flavobacterium psychrophilum, a bacterium which is highly contagious in cold water. This bacterium causes Bacterial Cold Water Disease (BCWD) in the fish, which leads to severe symptoms and often results in death. This bacterium’s contagion poses a problem for trout hatcheries, which harvest over 1,000,000 lbs of these fish a year. The National Center for Cool and Cold Water Aquaculture has bred two distinct lines of rainbow trout: one line that is heavily susceptible to F. psychrophilum, and one that is resistant to it. Although this lab was able to genetically ...
Pharmacodynamic Activity Of Fosfomycin Simulating Urinary Concentrations Achieved After A Single 3 Gram Oral Dose Versus Escherichia Coli Using An In Vitro Model, George G. Zhanel, Kate Parkinson, Sean Higgins, Andrew Denisuik, Heather Adam, Johann Pitout, Ayman Noreddin, James A. Karlowsky
Pharmacy Faculty Articles and Research
We assessed the activity of fosfomycin simulating urinary concentrations achieved after a single 3 gram oral dose against Escherichia coli using an in vitro pharmacodynamic model. Eleven urinary isolates of E. coli were studied. Isolates were ESBL-producing or carbapenemase-producing. The in vitro pharmacodynamic model was inoculated with an inoculum of (~1 × 106 cfu/mL). Fosfomycin was administered to simulate maximum free (ƒ) urine (U) concentrations and a t1/2 obtained after a standard single 3 gram oral dose in healthy volunteers (ƒUmax, 4000 mg/L; t1/2, 6 h). Sampling was performed over 48 h to ...
Dietary Refinement And The Upper Gut Microbiota: The Starting Point For Obesity And Non-Communicable Diseases?, 2017 Ancestral Health Society
Dietary Refinement And The Upper Gut Microbiota: The Starting Point For Obesity And Non-Communicable Diseases?, Ian Spreadbury
Journal of Evolution and Health
No abstract provided.
Clostridium Difficile, 2017 Otterbein University
Clostridium Difficile, Ryan Osborn
Master of Science in Nursing (MSN) Student Scholarship
Clostridium Difficile infection (CDI) is an antibiotic resistant bacterium that is widely recognized and currently noted to be the "most common and costly healthcare associated infection in the United States" (Abt, McKenney & Pamer, 2016). The topic of CDI is important to discuss, as this infection can attack all patient populations especially those following antibiotic treatment. A disruption in a person's intestinal microbiota is known to place them at higher risk for CDI (Abt, McKenney & Pamer, 2016). Becoming infected with this bacterium leads to symptoms of diarrhea, bloating, belly pain, and occasionally fevers. The growing prevalence, antibiotic resistance associated with ...
Role Of Intracellular Growth During The Gastrointestinal Stage Of Listeria Monocytogenes Infection, 2017 University of Kentucky
Role Of Intracellular Growth During The Gastrointestinal Stage Of Listeria Monocytogenes Infection, Grant Steven Jones
Theses and Dissertations--Microbiology, Immunology, and Molecular Genetics
Listeria monocytogenes is a facultative intracellular bacterium that causes foodborne disease in humans. L. monocytogenes invade the gut mucosa and then disseminate, causing systemic infections associated with high mortality rates in immunocompromised individuals. It is unknown how L. monocytogenes traffic to the mesenteric lymph nodes, which represent an important bottleneck for systemic spread. In addition, little is known about the gastrointestinal stage of infection due to the general resistance of mice to oral infection with L. monocytogenes. Our laboratory developed a novel foodborne mouse model of listeriosis utilizing a murinized strain of L. monocytogenes to investigate the gastrointestinal stage of ...
Using Extremophile Bacteriophage Discovery In A Stem Education Professional Development Partnership To Explore Model Classroom Research Experiences Integrating The Three Dimentions Of The Next Generation Science Standards, 2017 University of Southern Maine
Using Extremophile Bacteriophage Discovery In A Stem Education Professional Development Partnership To Explore Model Classroom Research Experiences Integrating The Three Dimentions Of The Next Generation Science Standards, Carrie L. Boudreau
All Theses & Dissertations
The National Research Council’s (NRC) A Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas describes a vision of what it means to be proficient in science. The project discussed in this thesis was developed with a NIH SEPA Grant 8R25OD010937 to the Virology and Electron Microscopy Laboratory at the University of Southern Maine (USM) under the direction of Dr. S. Monroe Duboise. The goal of the project was to explore using discovery of extreme environment bacteria and their bacteriophages as a model for using the three dimensions of learning to teach Next Generation Science Standards (NGSS ...
An Unusual Case Of Escherichia Coli Meningitis And Bacteremia In An Elderly Woman Presenting With Intractable Low Back Pain, 2016 St. Mary's Medical Center, Huntington, WV
An Unusual Case Of Escherichia Coli Meningitis And Bacteremia In An Elderly Woman Presenting With Intractable Low Back Pain, Andrea M. Lauffer, Mahmoud Shorman, Carl Mccomas
Marshall Journal of Medicine
We report an unusual case of E. coli meningitis in an elderly woman who presented to the emergency room with a chief complaint of intractable low back pain.
A 67 year old woman presented to the emergency room for a chief complaint of intractable low back pain. After admission, the patient developed delirium. Blood cultures were drawn. Patient underwent a lumbar puncture which revealed purulent cerebrospinal fluid. Results of the cerebrospinal fluid and blood cultures revealed pan-sensitive E. coli.
In the geriatric population, delayed presentation of meningitis can occur for various reasons. With the older ...
Laboratory Exercises In Microbiology: Discovering The Unseen World Through Hands-On Investigation, 2016 CUNY Queensborough Community College
Laboratory Exercises In Microbiology: Discovering The Unseen World Through Hands-On Investigation, Joan Petersen, Susan Mclaughlin
Open Educational Resources
The exercises in this laboratory manual are designed to engage students in hand-on activities that reinforce their understanding of the microbial world. Topics covered include: staining and microscopy, metabolic testing, physical and chemical control of microorganisms, and immunology. The target audience is primarily students preparing for a career in the health sciences, however many of the topics would be appropriate for a general microbiology course as well.
Optimization Of A Genomic Editing System Using Crispr/Cas9-Induced Site-Specific Gene Integration, 2016 California State University, Chico
Optimization Of A Genomic Editing System Using Crispr/Cas9-Induced Site-Specific Gene Integration, Jillian L. Mccool Ms., Nick Hum, Gabriela G. Loots
STAR (STEM Teacher and Researcher) Presentations
The CRISPR-Cas system is an adaptive immune system found in bacteria which helps protect against the invasion of other microorganisms. This system induces double stranded breaks at precise genomic loci (1) in which repairs are initiated and insertions of a target are completed in the process. This mechanism can be used in eukaryotic cells in combination with sgRNAs (1) as a tool for genome editing. By using this CRISPR-Cas system, in addition to the “safe harbor locus,” ROSAβ26, the incorporation of a target gene into a site that is not susceptible to gene silencing effects can be achieved through few ...
Antibiotic Drug Discovery With An Eye Towards Overcoming Drug Resistance, 2016 University of Tennessee Health Science Center
Antibiotic Drug Discovery With An Eye Towards Overcoming Drug Resistance, Daniel Towner Hoagland
Theses and Dissertations (ETD)
As a species, humans have become ever reliant on the use of antibiotics to facilitate our everyday lives. The widespread emergence of resistance to currently used antibiotics is commonly attributed to an over use in our society. Such resistance, coupled with a lack of innovation and production of novel antibiotic drugs, threatens to return humanity to an era similar to one before the discovery of the first antibiotics. The need to find new agents to be used in this fight is paramount, as well as learning from our recent failures to produce such compounds. This document will highlight my efforts ...
Effects Of Prebiotics On Gut Bacterial Communities And Healing Of Induced Colitis In Mice, 2016 University of Southern Mississippi
Effects Of Prebiotics On Gut Bacterial Communities And Healing Of Induced Colitis In Mice, Krystyn Elizabeth Davis
Inflammatory Bowel Diseases (IBD) cause chronic inflammation of the gastrointestinal tract and debilitating symptoms in those suffering from the diseases. After inducing colitis in a mouse model using Dextran Sulfate Sodium (DSS), prebiotics inulin and oligofructose enriched inulin (OEI) were used as treatments to determine their effects on the gut microbial community, physiological healing process, and immune response in the mice after initial inflammation and before subsequent inflammation, or relapse. The treatment with inulin led to an increase in regulatory T cell number, but this increase was not as significant as the increase induced by the OEI. Inulin increased the ...
Gram-Negative Bacteria And Sepsis, 2016 Otterbein University
Gram-Negative Bacteria And Sepsis, Christine D. Ridge
Master of Science in Nursing (MSN) Student Scholarship
Today’s medical world encompasses an environment in which gram-negative bacteria that once were defeated with common antibiotics, have now become resistant. Gram-negative bacteria like Klebsiella pneumoniae, Pseudomonas aeruginosa, Enterobacter, and Acinetobacter are pathogens that are an emerging threat causing sepsis due to multidrug-resistance (Pop-Vicas & Opal, 2014, p.189). The multidrug-resistance mechanisms of gram-negative bacteria coupled with a patient population commonly seen in hospital settings, that consist of immunocompromised adults due to advancing age, comorbidities (e.g. AIDS, history of transplants, diabetes, and chemotherapy), and immunotherapies, create an environment for advanced infection or sepsis to take place.
Complications of multidrug-resistant ...
Investigating The Origin And Functions Of A Novel Small Rna In Escherichia Coli, 2016 Portland State University
Investigating The Origin And Functions Of A Novel Small Rna In Escherichia Coli, Fenil Rashmin Kacharia
Dissertations and Theses
Non-coding small RNAs (sRNAs) regulate various cellular processes in bacteria. They bind to a chaperone protein Hfq for stability and regulate gene expression by base-pairing with target mRNAs. Although the importance of sRNAs in bacteria has been well established, the mode of origination of novel sRNA genes is still elusive, mainly because the rapid rate of evolution of sRNAs obscures their original sources. To overcome this impediment, we identified a recently formed sRNA (EcsR2) in E. coli, and show that it evolved from a degraded bacteriophage gene. Our analyses also revealed that young sRNAs such as EcsR2 are expressed at ...
Redesigning Gfp Reporter System For Utilization In Clostridium Difficile, 2016 University of Arkansas, Fayetteville
Redesigning Gfp Reporter System For Utilization In Clostridium Difficile, Laura E. Fitzgerald
Biological Sciences Undergraduate Honors Theses
Clostridium difficile (C. difficile) is a gram-positive bacterium that comprises part of the healthy human gut microbiome. When it gains sufficient access to peptides, C. difficile flourishes and releases tissue-damaging toxins, which cause inflammation of the colon that can develop into a Clostridium difficile Infection (CDI).10 The Ivey Laboratory believes that the best tactic in preventing CDIs is stopping peptide ingestion, which theoretically could be accomplished by manipulating the oligopeptide permease (App) system.7 In order to verify that altering the App system would successfully impede peptide uptake, first the expression of the app Promoter Region (appProR) of ...
Peptidomimetic Small Molecules Disrupt Type Iv Secretion System Activity In Diverse Bacterial Pathogens, 2016 Vanderbilt University
Peptidomimetic Small Molecules Disrupt Type Iv Secretion System Activity In Diverse Bacterial Pathogens, Carrie L. Shaffer, James A.D. Good, Santosh Kumar, K. Syam Krishnan, Jennifer A. Gaddy, John T. Loh, Joseph Chappell, Fredrik Almqvist, Timothy L. Cover, Maria Hadjifrangiskou
Pharmaceutical Sciences Faculty Publications
Bacteria utilize complex type IV secretion systems (T4SSs) to translocate diverse effector proteins or DNA into target cells. Despite the importance of T4SSs in bacterial pathogenesis, the mechanism by which these translocation machineries deliver cargo across the bacterial envelope remains poorly understood, and very few studies have investigated the use of synthetic molecules to disrupt T4SS-mediated transport. Here, we describe two synthetic small molecules (C10 and KSK85) that disrupt T4SS-dependent processes in multiple bacterial pathogens. Helicobacter pylori exploits a pilus appendage associated with the cag T4SS to inject an oncogenic effector protein (CagA) and peptidoglycan into gastric epithelial cells. In ...
Antibacterial Derivatives Of Marine Algae: An Overview Of Pharmacological Mechanisms And Applications, 2016 Dublin Institute of Technology
Antibacterial Derivatives Of Marine Algae: An Overview Of Pharmacological Mechanisms And Applications, Emer Shannon, Nissreen Abu-Ghannam
The marine environment is home to a taxonomically diverse ecosystem. Organisms such as algae, molluscs, sponges, corals, and tunicates have evolved to survive the high concentrations of infectious and surface-fouling bacteria that are indigenous to ocean waters. Both macroalgae (seaweeds) and microalgae (diatoms) contain pharmacologically active compounds such as phlorotannins, fatty acids, polysaccharides, peptides, and terpenes which combat bacterial invasion. The resistance of pathogenic bacteria to existing antibiotics has become a global epidemic. Marine algae derivatives have shown promise as candidates in novel, antibacterial drug discovery. The efficacy of these compounds, their mechanism of action, applications as antibiotics, disinfectants, and ...