Bacterial Infections and Mycoses Commons^™

Malaria-Induced Nlrp12/Nlrp3-Dependent Caspase-1 Activation Mediates Inflammation And Hypersensitivity To Bacterial Superinfection, Marco A. Ataide, Warrison A. Andrade, Dario S. Zamboni, Donghai Wang, Maria Do Carmo Souza, Bernardo S. Franklin, Samir Elian, Flaviano S. Martins, Dhelio Pereira, George W. Reed, Katherine A. Fitzgerald, Douglas T. Golenbock, Ricardo T. Gazzinelli

Katherine A. Fitzgerald

Cyclic paroxysm and high fever are hallmarks of malaria and are associated with high levels of pyrogenic cytokines, including IL-1beta. In this report, we describe a signature for the expression of inflammasome-related genes and caspase-1 activation in malaria. Indeed, when we infected mice, Plasmodium infection was sufficient to promote MyD88-mediated caspase-1 activation, dependent on IFN-gamma-priming and the expression of inflammasome components ASC, P2X7R, NLRP3 and/or NLRP12. Pro-IL-1beta expression required a second stimulation with LPS and was also dependent on IFN-gamma-priming and functional TNFR1. As a consequence of Plasmodium-induced caspase-1 activation, mice produced extremely high levels of IL-1beta upon a second …

Enhancement Of Antimicrobial Activity Of Naturally Occuring Phenolic Compounds By Nano-Particle Mediated Delivery Against Listeria Monocytogenes, Escherichia Coli O157:H7, And Salmonella Typhimurium, Madhuram Ravichandran

Graduate Theses and Dissertations

Food-borne illnesses are of major concern in the U.S. and worldwide. Salmonella,Listeria,E. coli O157:H7 continue to be some of the major foodborne pathogens. Recurring recalls due to these pathogens demand critical antimicrobial strategies to decontaminate the food through its procession from farm to fork. In our study, we combined the effectiveness of naturally occurring phenolic compounds individually, with/ without ethylenediamine tetraacetic acid (EDTA) and/or Nisin and nanoparticle delivery to improve the antimicrobial potential of the compounds against Listeria monocytogenes (L.m.), Salmonella Typhimurium (S.T.), and Escherichia coli O157:H7 (E.c.), in brain …

Chip-Seq And In Vivo Transcriptome Analyses Of The Aspergillus Fumigatus Srebp Srba Reveals A New Regulator Of The Fungal Hypoxia Response And Virulence, Dawoon Chung, Bridget M. Barker, Charles C. Carey, Brittney Merriman

Dartmouth Scholarship

The Aspergillus fumigatus sterol regulatory element binding protein (SREBP) SrbA belongs to the basic Helix-Loop-Helix (bHLH) family of transcription factors and is crucial for antifungal drug resistance and virulence. The latter phenotype is especially striking, as loss of SrbA results in complete loss of virulence in murine models of invasive pulmonary aspergillosis (IPA). How fungal SREBPs mediate fungal virulence is unknown, though it has been suggested that lack of growth in hypoxic conditions accounts for the attenuated virulence. To further understand the role of SrbA in fungal infection site pathobiology, chromatin immunoprecipitation followed by massively parallel DNA sequencing (ChIP-seq) was …

Necrotizing Fasciitis, Holly Herron

Nursing Student Class Projects (Formerly MSN)

Necrotizing fasciitis also known as necrotizing soft tissue infections (NSTIs) is a rare life-threatening infection that involves the skin and soft tissue. A rapid and accurate diagnosis of NSTIs must be identified by healthcare providers to diminish morbidity and mortality. NSTIs are characterized by progressive necrosis of subcutaneous tissue and fascia involving large areas of tissue (Lin, Chang, Lai, Lin, & Chen, 2013). Hippocrates (500 BC) described necrotizing fasciitis as “diffuse erysipelas caused by trivial accidents [where] flesh, sinews, and bones fell away in large quantities, [leading to] death in many cases” (Lancerotto, Tocco, Salmaso, Vindigni & Bassetto, 2012). In …

Necrotizing Fasciitis: The “Flesh Eating” Disease, John Neukam

Nursing Student Class Projects (Formerly MSN)

Necrotizing fasciitis, often referred to as the “flesh-eating disease”, is a rare bacterial infection with an extremely high mortality rate with symptoms that begin subtle but can quickly ravish the human body.1 While the prevalence of this disease is relatively low, evidence of this disease can be traced back as far as the 5th century BC where it was initially described by Hippocrates.2 It wasn’t until 1952 however that Dr. Bob Wilson termed the disease “necrotizing fasciitis”.3 The rapid progression of this disease and the acute deterioration it causes in a patient is extremely intriguing. This “flesh-eating disease” can present …

Enterococcus Faecalis Endocarditis: A Case Study, Torri Curtis

Nursing Student Class Projects (Formerly MSN)

Infectious endocarditis is an uncommon disease of the heart stemming from a bacterial or fungal infection on the endocardial surface of the heart or heart valve (Pierce, Calkins, & Thornton, 2012). From review of the literature, infective endocarditis is fairly uncommon and may be difficult to initially diagnose. Per Sabe, Shrestha, and Menon, occurrence of infective endocarditis (IE) is nearly 0.9-6.2 per 100,000 persons per year (2013). Several preexisting conditions such as aging, heart valve disease, implantable cardiac devices, a history of heart disease such as rheumatic fever, and invasive procedures can put a patient at higher risk for IE …

Evaluation Of The Effectiveness Of A Newly Implemented, Proactive Approach To Legionellosis Investigations Conducted By The Southern Nevada Health District, Devin Charlotte Raman

UNLV Theses, Dissertations, Professional Papers, and Capstones

This project is an evaluation of a new, more proactive approach to legionellosis investigations conducted by the Southern Nevada Health District. The new protocol was conceived, written and adopted in April of 2012 with the goal of preventing outbreaks of Legionnaires' disease that can have a significant impact on public health and the resort industry of Las Vegas. The objectives of this project were to determine if the remediation methods were successful at eliminating the target organism from water systems and maintaining a negative status throughout the monitoring period, to conduct a cost/benefit analysis, and to compare this protocol with …

Infectious Diseases, Bert Chapman

Libraries Faculty and Staff Scholarship and Research

Provides information about the role of infectious diseases in the early years of U.S. History, with particular emphasis on how they impacted injuries sustained in military conflict.

Bacteria On Shared Mobile Phones Can Lead To Infections, Roberta Basol, Jean Beckel, Judy Gilsdorf-Gracie, Amy Hilleren-Listerud, Terri Mccaffrey, Sherri Reischl, Pamela Rickbeil, Mary Schimnich, Kirsten Skillings, Mary A. Struffert

Articles

It's now a common practice for hospital-owned mobile phones to be shared among healthcare employees from shift to shift. Despite the benefit of increased, timely communication between caregivers, sharing mobile devices can lead to the spread of healthcare-associated infections (HAIs) if they aren't properly disinfected. The Guidelines for Disinfection and Sterilization in Healthcare Facilities describe "non-critical environmental surfaces" as items that are frequently touched by the hand and may pose a risk of secondary infection transmission.

Trends And Disparities In Tb Among U.S.-Born Black And White Chicago Residents, 1998-2008, Susan A. Lippold, Lori Armstrong, Jennifer M. Carter, Xiomara Hardison

Journal of Health Disparities Research and Practice

ABSTRACT

OBJECTIVE: To describe the decline of tuberculosis (TB) cases among U.S.-born non-Hispanic (NH) black and white Chicago residents.

METHODS: Data from the National TB Surveillance System was used to analyze trends and characteristics of reported TB cases among U.S.-born NH black and U.S.-born NH white Chicago residents from 1998-2008.

RESULTS: Chicago reported a total of 3,821 TB cases over the 11-year time period. Of these, 1,916 were U.S.-born NH black and 235 were U.S.-born NH white. The proportion of cases attributable to U.S.-born NH blacks was 63% (294/469) in 1998 and 34% in 2008 (72/213). Analysis for trends from …

Application Of Nuclear Magnetic Resonance Based Metabolomics To Study The Central Metabolism Of Staphylococci, Bo Zhang

Department of Chemistry: Dissertations, Theses, and Student Research

Metabolomics studies the collection of small molecules (metabolites) involved in enzymatically catalyzed reactions, cell signaling and cellular structure. Perturbations in metabolite concentrations have been used to reflect the activity of corresponding enzymes or proteins. Nuclear magnetic resonance (NMR) spectroscopy is a well-known approach for the structure determination of biological macromolecules. Alternatively, NMR has recently been established as a valuable tool of metabolomics, in which NMR spectral signals correlate small molecules with cellular activities. This has been accomplished through the chemometric analysis of high-throughput one dimensional ¹H spectra (metabolic fingerprinting) and quantitative metabolite identification based on two dimensional ¹H, …

Investigating The Viability Of Two Stenotrophomonas Maltophilia Isolates After Air-Drying, Samantha Lane, Joanna Brooke

DePaul Discoveries

Abstract

Stenotrophomonas maltophilia is a water-borne infectious bacterium that is found in both clinical (hospitals) and non-clinical environments. This human pathogen is commonly recovered from respiratory tract infections. A recent study at a hospital in Taiwan suggested that dry patient charts can serve as a vehicle of transmission of this bacterium⁷. As S. maltophilia is not commonly isolated from dry surfaces, this current study tested the hypothesis that this pathogen can remain viable for some time on a dry surface. This study was designed to determine how long S. maltophilia could remain viable after air-drying by observing …

Characterizing The Response Of Multidrug-Resistant Klebsiella Pneumoniae Species To The Application Of A Phage Cocktail, Steven Liu

Symposium

Project Summary: The application of bacteriophages to treat bacterial infections is known as phage therapy, which takes advantage of bacteriophage’s natural ability to infect and lyse bacterial hosts. Phages have been shaped by billions of years of evolution to be highly specialized deliverers of bactericidal agents to the cytoplasm of their target bacteria. Ever since discovery of bacteriophages in 1915, phage therapy was recognized as a potentially powerful tool for eliminating bacterial infections. The effectiveness of phage therapy can be increased by creating a mixture of multiple phages to target a wider variety of bacterial strains. Furthermore, phage therapy has …

Analysis Of Invariant Natural Killer T Cells In Intra-Abdominal Sepsis, Ram Venkatesh Anantha

Electronic Thesis and Dissertation Repository

Sepsis is characterized by a severe systemic inflammatory response to infection that is associated with high morbidity and mortality despite optimal care. Invariant natural killer T (iNKT) cells are potent regulatory lymphocytes that can produce pro- and/or anti-inflammatory cytokines, thus shaping the course and nature of immune responses; however, little is known about their role in sepsis. We demonstrate here that patients with sepsis/severe sepsis have significantly elevated proportions of circulating iNKT cells in their peripheral blood, as compared to non-septic patients. We therefore investigated iNKT cells in mice with intra-abdominal sepsis (IAS). Our data show that iNKT cells are …

Sirt1 Deletion Leads To Enhanced Inflammation And Aggravates Endotoxin-Induced Acute Kidney Injury, Rong Gao, Jiao Chen, Yuxin Hu, Zhenyu Li, Shuxia Wang, Sreerama Shetty, Jian Fu

Toxicology and Cancer Biology Faculty Publications

Bacterial endotoxin has been known to induce excessive inflammatory responses and acute kidney injury. In the present study, we used a mouse model of endotoxemia to investigate the role of Sirt1 in inflammatory kidney injury. We examined molecular and cellular responses in inducible Sirt1 knockout (Sirt1-/-) mice and wild type littermates (Sirt1+/+) in lipopolysaccharide (LPS)-induced kidney injury. Our studies demonstrated that Sirt1 deletion caused aggravated kidney injury, which was associated with increased inflammatory responses including elevated pro-inflammatory cytokine production, and increased ICAM-1 and VCAM-1 expression. Inflammatory signaling such as STAT3/ERK phosphorylation and NF-κB activation was markedly elevated in kidney tissues …

Robust System For Infection Control - An Industrial Systems Engineering Approach, Sundaravel Vinay Swarup Achudhan

Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research

Health care delivery in the United States needs improvement. Each year about 98,000 people die as a result of medical errors and the United States is outranked by a number of developed countries in life expectancy, mortality and comorbidity. Healthcare quality is determined based on the quality of the service provided to the patient during their visit. Apart from the traditional problem solving design and development tools used to improve healthcare quality, The National Academy of Engineering and the Institute of Medicine recommend systems engineering principle and systems engineering tools to be used in health care to improve the industry. …

The Reduction Of Central Line-Associated Bloodstream Infections In Intensive Care Units Through The Implementation Of The Comprehensive Unit-Based Safety Program, Michael Andrew Basinger

UNLV Theses, Dissertations, Professional Papers, and Capstones

Central line-associated bloodstream infections (CLABSIs) are one of the most significant healthcare-associated infections (HAIs) in the Intensive Care Unit (ICU) setting resulting in increased lengths of stay, increased healthcare costs, and higher mortality rates (Institute of Healthcare Improvement [IHI], 2012). Evidence that CLABSIs are largely preventable has created opportunities for healthcare organizations to implement evidence-based bloodstream infection prevention practices to reduce or eliminate these infections (Lissauer, Leekisa, Prease, Thom, & Johnson, 2012). Other efforts to reduce CLABSIs include implementation of safety programs to improve the safety culture in ICUs (Lissauer et al., 2012). One program, the comprehensive unit-based safety program …

Eculizumab In The Successful Treatment Of Postpartum Hemolytic Uremic Syndrome - A Case Report, Craig A. Mackaness Do, Frederick S. Fleszler Md

Department of Medicine

No abstract provided.

Effect Of Ascorbate On Coagulation And Fibrinolytic Factors In The Septic Microvasculature, Scott Swarbreck

Electronic Thesis and Dissertation Repository

Sepsis, a systemic inflammatory response to an infection, is a significant cause of morbidity and mortality worldwide. The microcirculation during sepsis fails, in part, due to microthrombosis and the resulting plugging of capillaries, precipitating organ failure. Intravenous injection of ascorbate has been shown to reduce capillary plugging, however the mechanism of this protective effect is unclear. We hypothesized that ascorbate-mediated destabilization of the microthrombi through promoting fibrinolysis could contribute to this protection.

We showed that streptokinase, a pro-fibrinolytic agent, reduced the capillary plugging to a similar degree as ascorbate. This similarity provided the impetus for studying the effect of ascorbate …

The Gut Reaction: How The Intestinal Microbiota Respond To Citrobacter Rodentium Colonization, Cassandra Black

Senior Honors Theses

The human intestine hosts a diverse community of bacteria known as the intestinal microbiota. The intestinal microbiota have a symbiotic relationship with the host organism. Current research does not clearly define the effect these commensal microorganisms have on the overall maintenance of gastrointestinal health, including protection from the invasion and pathogenesis of foreign bacteria known as pathogens. EHEC O157:H7 causes severe sickness and can be life-threatening, but is difficult to study in vivo. One challenge is that EHEC does not colonize the preferred animal model for human GI studies: the murine intestine. However, the murine pathogen Citrobacter rodentium has …

Age Related Clinical Manifestation Of Acute Bacterial Meningitis In Children, Jabeen Fayyaz, Arshalooz Rehman, Akhter Hamid, Munawar Khursheed, Nukhbha Zia, Asher Feroze

Department of Emergency Medicine

Objective: To determine the signs and symptoms of acute bacterial meningitis (ABM) in different age grops of a paediatric population.

Methods: The retrospective study comprised patients who had been admitted through the Emergency Department of Aga Khan University Hospital, Karachi with the relevant diagnosis from September 2009 to September 2011. Case record forms were used to collect data from patient files. Data was collected using variables such as age, gender, presenting complaints, clinical signs and symptoms, computed tomography scan findings and final outcome of patients. There was a minimal risk of breach in patient confidentiality. SPSS 19 was used for …

Vaccine-Preventable Diseases In Travelers, Edith Mirzaian, Jeffery A. Goad, Ani Amloian, Fady Makar

Pharmacy Faculty Articles and Research

Travel to the developing world is increasing among those from developed countries, placing them at risk for vaccine preventable and non-vaccine preventable diseases. From 2007-2011, the GeoSentinel Network reported 737 returned travelers with a vaccine preventable disease. While it is essential that clinicians use vaccines when available for a disease of risk, they should also be aware that the vast majority of diseases acquired by travelers are non-vaccine preventable. The vaccine preventable diseases can be divided into routine travel vaccines, special travel vaccines and routine vaccines used for travel. The routine travel vaccines include Hepatitis A and B, typhoid; special …

Listeria Monocytogenes Can Utilize Both M Cell Transcytosis And Inla-Mediated Uptake To Cross The Epithelial Barrier Of The Intestine During An Oral Infection Model Of Listeriosis, Hilary Denney

Theses and Dissertations--Medical Sciences

The invasive pathways, InlA- and InB-mediated uptake and M cell transcytosis, that Listeria monocytogenes uses to invade the intestine have mainly been studied using infection models that do not truly replicate what occurs during a natural infection. Recently, our lab has developed an oral infection model that is more physiolocally relevant to what occurs during food borne listeriosis. We have sought to evaluate the relative roles of the previously defined invasive pathways, in our oral model of infection. We have done this by utilizing an InlAmCG Lm strain that is able to bind murine E-cadherin, knockout Lm strains, ΔinlA Lm …

A Nmr Experiment For Simultaneous Correlations Of Valine And Leucine/Isoleucine Methyls With Carbonyl Chemical Shifts In Proteins, Vitali Tugarinov, Vincenzo Venditti, G. Marius Clore

Vincenzo Venditti

A methyl-detected ‘out-and-back’ NMR experiment for obtaining simultaneous correlations of methyl resonances of valine and isoleucine/leucine residues with backbone carbonyl chemical shifts, SIM-HMCM(CGCBCA)CO, is described. The developed pulse-scheme serves the purpose of convenience in recording a single data set for all Ileδ1, Leuδ and Valγ (ILV) methyl positions instead of acquiring two separate spectra selective for valine or leucine/isoleucine residues. The SIM-HMCM(CGCBCA)CO experiment can be used for ILV methyl assignments in moderately sized protein systems (up to ~100 kDa) where the backbone chemical shifts of 13Cα, 13Cβ and 13CO are known from prior NMR studies and where some losses in …

Tick-Bourne Pathogens Of Potential Zoonotic Importance In The Southern African Region, Simbarashe Chitanga, Holly Gaff, Samson Mukaratirwa

Biological Sciences Faculty Publications

The aim of this communication is to provide preliminary information on the tick-borne pathogens of potential zoonotic importance present in southern Africa, mainly focusing on their geographical distribution and host range, and to identify research gaps. The following tick-borne zoonoses have been reported to occur in southern Africa based mainly on case reports: Crimean–Congo haemorrhagic fever caused by Crimean–Congo haemorrhagic fever virus; ehrlichiosis caused by Ehrlichia ruminantium, Ehrlichia canis and Anaplasma phagocytophilum; babesiosis caused by Babesia microti; relapsing fever caused by Borrelia duttonii and rickettsioses caused by Rickettsia africae, Rickettsia aeschlimannii and Rickettsia conorii. The …

Integrating Phage Therapy Into Western Medicine, Jacob B. Jaminet

Undergraduate Research Posters

The World Health Organization has described the rise of antibiotic use as a “global heath security emergency” (who.int). With the growing concern about antibiotic resistant bacteria, there has been an increased interest in bacteriophages. Bacteriophages are high-specific viruses that only infect bacteria. The use of bacteriophages medicinally to treat bacteria is called phage therapy. Research in phage therapy gained momentum until the introduction of antibiotics. While the USA and other Western countries accepted antibiotics, the Soviet Union and their satellite nations still continued to research phages. Since the funding for research was supplied by the Soviet military, the results of …

The Effects That Liquid And Solid Cattle Manure Have On The Water Quality Of Drainage Ditches In Putnam County, Ohio, Janelle Horstman

Honors Projects

Lake Erie has experienced harmful algal blooms with increased frequency since the mid-1990s due to excess nutrients from Rivers, such as the Maumee River, and largely agricultural watersheds. Nonpoint source pollution from agriculture contributes to eutrophication, algal blooms, and the degradation of water quality. This creates stress on aquatic fauna, reduced aesthetic quality, odor, and limits of the water for usage of drinking, recreation, and industry. This research paper asks what the contributions of having access to manure application records, soil records, and information about antibiotics have on what is known about manure management and antibiotic resistance, which has been …

Cytotoxic Clinical Isolates Of Pseudomonas Aeruginosa Identified During The Steroids For Corneal Ulcers Trial Show Elevated Resistance To Fluoroquinolones, Durga S. Borkar, Nisha R. Acharya, Chelsia Leong, Prajna Lalitha, Muthiah Srinivasan, Catherine E. Oldenburg, David J. Evans

Faculty Publications & Research of the TUC College of Pharmacy

Background: To determine the relationship between type three secretion genotype and fluoroquinolone resistance for P. aeruginosa strains isolated from microbial keratitis during the Steroids for Corneal Ulcers Trial (SCUT) and for two laboratory strains, PA103 and PAO1.

Methods: Confirmed P. aeruginosa isolates from the SCUT were divided into exoU(+) or exoU(−). The exoU(+) strains contained the gene encoding ExoU, a powerful phospholipase toxin delivered into host cells by the type three secretion system. Isolates were then assessed for susceptibility to fluoroquinolone, cephalosporin, and aminoglycoside antibiotics using disk diffusion assays. Etest was used to determine the MIC of moxifloxacin …

Effect Of The Clostridium Difficile Tcde Protein On Membranes Of Escherichia Coli, Sophie Hollenberg

Inquiry: The University of Arkansas Undergraduate Research Journal

Clostridium difficile infects millions of hospitalized patients worldwide, causing pseudomembranous colitis, a disease with symptoms attributable to two toxins produced by the bacterium.The PaLoc gene locus in the C. difficile genome is responsible for toxin production and activation, but it is not known how the toxins are released from the pathogen. Within PaLoc is a gene for the TcdE protein, which shares striking similarity to a class of membrane pore-forming proteins called holins. To assess whether TcdE catalyzes toxin release, the engineered tcdE gene was expressed in Escherichia coli. An arabinose promoter upstream of the tcdE gene was manipulated to …

Simultaneous Bactericidal And Osteogenic Effect Of Nanoparticulate Calcium Phosphate Powders Loaded With Clindamycin On Osteoblasts Infected With Staphylococcus Aureus, Vuk Uskoković, Tejal A. Dasai

Pharmacy Faculty Articles and Research

S aureus internalized by bone cells and shielded from the immune system provides a reservoir of bacteria in recurring osteomyelitis. Its targeting by the antibiotic therapy may thus be more relevant for treating chronic bone infection than eliminating only the pathogens colonizing the bone matrix. Assessed was the combined osteogenic and antibacterial effect of clindamycinloaded calcium phosphate nanoparticles of different monophasic compositions on co-cultures comprising osteoblasts infected with S aureus. Antibiotic-carrying particles were internalized by osteoblasts and minimized the concentration of intracellular bacteria. In vitro treatments of the infected cells, however, could not prevent cell necrosis due to the …