Medicine and Health Sciences Commons^™

Case Of Human Orthohantavirus Infection, Michigan, Usa, 2021, Samuel M Goodfellow, Robert A Nofchissey, Dustin Arsnoe, Chunyan Ye, Seonghyeon Lee, Jieun Park, Won-Keun Kim, Kartik Chandran, Shannon L M Whitmer, John D Klena, Jonathan W Dyal, Trevor Shoemaker, Diana Riner, Mary Grace Stobierski, Kimberly Signs, Steven B Bradfute

Journal Articles

Orthohantaviruses cause hantavirus cardiopulmonary syndrome; most cases occur in the southwest region of the United States. We discuss a clinical case of orthohantavirus infection in a 65-year-old woman in Michigan and the phylogeographic link of partial viral fragments from the patient and rodents captured near the presumed site of infection.

Perceived Moral Distress Among Patient-Facing Healthcare Professionals During The Covid-19 Pandemic, Sarah Sumner, Karen Colorafi, Teresa Rangel

Articles, Abstracts, and Reports

No abstract provided.

Non-Thermal Plasma Reduces Hsv-1 Infection Of And Replication In Hacat Keratinocytes In Vitro, Julia Sutter, Jascha Brettschneider, Brian Wigdahl, Peter Bruggeman, Fred Krebs, Vandana Miller

Kimmel Cancer Center Faculty Papers

Herpes simplex virus type 1 (HSV-1) is a lifelong pathogen characterized by asymptomatic latent infection in the trigeminal ganglia (TG), with periodic outbreaks of cold sores caused by virus reactivation in the TG and subsequent replication in the oral mucosa. While antiviral therapies can provide relief from cold sores, they are unable to eliminate HSV-1. We provide experimental results that highlight non-thermal plasma (NTP) as a new alternative therapy for HSV-1 infection that would resolve cold sores faster and reduce the establishment of latent infection in the TG. Additionally, this study is the first to explore the use of NTP …

The Koolungar Moorditj Healthy Skin Project: Elder And Community Led Resources Strengthen Aboriginal Voice For Skin Health, Bernadette M. Ricciardo, Jacinta Walton, Noel Nannup, Dale Tilbrook, Heather-Lynn Kessaris, Carol Michie, Brad Farrant, Roni Forrest, Annette Garlett, Joanne Hill, Larissa Jones, Natasha Kickett, Sally Smith, Delys Walton, Taleah Ugle, Nadia Rind, Richelle Douglas, Jodie Ingrey, Brenda Carter, Ainslie Poore, Ingrid Amgarth-Duff, Hannah Thomas, Prasad S. Kumarasinghe, Jonathan R. Carapetis, Asha C. Bowen

Journal of the Australian Indigenous HealthInfoNet

In partnership with local Aboriginal Community Controlled Health Organisations, the Elder-led co-designed Koolungar Moorditj Healthy Skin project is guided by principles of reciprocity, capacity building, respect, and community involvement. Through this work, the team of Elders, community members, clinicians and research staff have gained insight into the skin health needs of urban-living Aboriginal koolungar (children); and having identified a lack of targeted and culturally appropriate health literacy and health promotion resources on moorditj (strong) skin, prioritised development of community-created healthy skin resources. Community members self-appointed to Aboriginal Community Advisory Groups (CAG) on Whadjuk (Perth) …

Development Of Solitary Keratoacanthoma From A Cutaneous Wart, Joshua M. Ninan, Veronica Salazar

Research Symposium

Background: Common cutaneous warts, referred to in medicine as verrucae vulgaris, are proliferative lesions caused by human papillomavirus. These lesions are mostly benign and usually resolve without incident, except in the case of the patient mentioned in this report. Our patient developed a solitary keratoacanthoma, currently accepted as a clinical variant of squamous cell carcinoma, as a result of several risk factors and traumatic exposure. The current literature does not have an established association of HPV with solitary keratoacanthomas. This case report explores the presentation and pathogenesis of solitary keratoacanthomas within the setting of HPV.

Case Presentation: 48-year-old Caucasian female …

Delayed Diagnosis Of Mycobacterium Bovis Bacillus Calmette-Guérin Periprosthetic Joint Infection Following Total Knee Arthroplasty, Christopher E. Pelt, Salika Shakir, Michael J. Cahill, Jakrapun Pupaibool, Barbara C. Cahill

SKMC Student Presentations and Publications

Periprosthetic joint infection (PJI) can present challenges in diagnosis and treatment, particularly in the setting of atypical causative organisms such as fungi and mycobacteria. Herein, we present a case and provide a review of the diagnosis and treatment of an unusual PJI caused by bacillus Calmette-Guérin, administered during the treatment of bladder cancer 3 years prior to total knee arthroplasty and subsequent PJI. Although the patient's history of bladder cancer was known, neither his Bacillus Calmette-Guérin treatment nor its potential for distant site spread that could lead to PJI were appreciated, leading to a prolonged diagnostic evaluation and treatment course.

Streptococcus Canis Native Aortic Valve Endocarditis Linked To Cat Exposure: A Case Report And Review, Michael S. Wang, Maria Huaringa, Lauren Feld, Ken Ochiai, Tiffany Whelan, Nicholas M. Frazier

Journal of Community Hospital Internal Medicine Perspectives

Streptococcus canis is an uncommon human pathogen, but documented infections have been mostly associated with exposure to dogs. There are only five documented cases of endocarditis secondary to streptococcus canis, with all cases except one documenting exposure to a canine. We present a 74-year-old male with a history of Type 2 diabetes mellitus, CKD 3, moderate aortic stenosis and remote exposure to agent orange, who was found to have Streptococcus canis native valve endocarditis without exposure to a dog. To the best of our knowledge this case is the first case of endocarditis linked to feline exposure.

Outcomes Of Upper Gastrointestinal Bleeding In Hospitalized Covid-19 Patients In The United States: A Propensity-Score Matched Analysis Of A Large National Database, Moon Ryu, Mohammed Quazi, Niloy Ghosh, Karthik Gangu, Amir H Sohail, Asif Farooq, Babu Sriram , Maringanti, Aman Goyal, Anupa Patel, Muhammad Salman Khan, Abu Baker Sheikh

Journal of Community Hospital Internal Medicine Perspectives

Patients with cirrhosis that are hospitalized with COVID-19 infection have been found to have worse outcomes. No comparative study has been conducted between gastrointestinal (GI) bleeding in patients with cirrhosis who are diagnosed with COVID-19. We utilized the National Inpatient Sample (NIS) database to perform a retrospective analysis of 24, 050 patients diagnosed with cirrhosis and COVID-19. The identified patients were separated into variceal bleeding, nonvariceal bleeding, and no (or neither) GI bleeding groups. After performing propensity sample matching and multivariate analysis of mortality, we found no significant differences in mortality among the three groups. However, the variceal bleed group …

Perceived Moral Distress Among Patient-Facing Healthcare Professionals During The Covid-19 Pandemic, Sarah Sumner, Karen Colorafi, Teresa Rangel

Providence Nursing Research Conference 2023 – Present

Background:

The most common framework for ethical decision-making in healthcare is principalism which is founded on three ethical traditions: utilitarianism, achieving the most good for the most people; deontology, upholding moral obligations to individuals; and virtue ethics, doing what is virtuous regardless of the consequences. Principalism is further guided by four principles: 1) respect for autonomy; 2) beneficence, the duty to do good; 3) nonmaleficence, the duty to do no harm; and 3) justice, the duty to treat similar cases similarly. Patient-facing healthcare professionals (HCPs) commonly expect all moral values will be considered when decisions are made that impact patients …

Vaccine Hesitancy Among Youth Living With Hiv In Detroit, Madeline B. Simone

Medical Student Research Symposium

Vaccine hesitancy among youth with human immunodeficiency virus (HIV) was evaluated to determine if the pandemic affected vaccine acceptance. A retrospective chart review was conducted to analyze vaccine rates over a five-year (pre-post COVID) in one university-based clinic. Results indicated a variation in acceptance rates between vaccines, with the MenACWY, MenB, tetanus, and HPV having the highest acceptance rates and COVID-19 and annual flu vaccine having the lowest acceptance rates. Vaccine hesitancy did not correlate with HIV treatment hesitancy nor with aversion to needles. Negative messaging around vaccines from a variety of sources appeared to be the primary factor in …

A Case Of Epstein-Barr Virus Encephalitis And Orbital-Face Inflammation, Rui T Tang, Jose Gavito-Higuera, Claudia M Prospero Ponce

Journal Articles

Epstein-Barr virus (EBV) can cause follicular conjunctivitis, keratitis, oculoglandular syndrome, meningitis, and encephalitis. We report a 54-year-old Hispanic male who presented with right pupil-involved complete ophthalmoplegia, orbital and masticatory muscle inflammation, trigeminal enhancement, and new corneal infiltrate highly suggestive of EBV. Labwork was negative except for positive EBV polymerase chain reaction (PCR) in serum. Magnetic resonance imaging (MRI) of his brain and orbits with contrast showed enhancement of the right ganglion of the trigeminal nerve, oculomotor nerve, all extraocular muscles in the right orbit, and right masticatory and temporalis muscles and a right subacute lacunar infarct. The patient was diagnosed …

Notes From The Field: Reemergence Of Mycoplasma Pneumoniae Infections In Children And Adolescents After The Covid-19 Pandemic, United States, 2018-2024., Chris Edens, Benjamin R. Clopper, Jourdan Devies, Alvaro Benitez, Erin R. Mckeever, Dylan Johns, Bernard Wolff, Rangaraj Selvarangan, Jennifer E. Schuster, Geoffrey A. Weinberg, Peter G. Szilagyi, Fatimah S. Dawood, Lakshmi Radhakrishnan, Christina Quigley, Leila C. Sahni, Natasha Halasa, Laura S. Stewart, Meredith L. Mcmorrow, Brett Whitaker, Danielle M. Zerr, Vasanthi Avadhanula, John V. Williams, Marian G. Michaels, Aaron Kite-Powell, Janet A. Englund, Mary Allen Staat, Kathleen Hartnett, Heidi L. Moline, Adam L. Cohen, Maureen Diaz

Manuscripts, Articles, Book Chapters and Other Papers

No abstract provided.

Ocular Syphilis: A Case Report And Public Health Discussion, Andrew L. Fine, Hope V. Daskalakis, Rutwik Pradeep Sharma M.D., Mirna Ogeilat M.D.

Advances in Clinical Medical Research and Healthcare Delivery

Ocular Syphilis describes a localized manifestation of a systemic treponema pallidum infection. It most commonly presents with decreased visual acuity due to uveitis and can occur at any time throughout the disease course. This report describes a case of undiagnosed syphilis that was serendipitously diagnosed with blood product screening. This case highlights the need for better public education and outreach pertaining to sexually transmitted infections. This report will detail this patient's clinical course and discuss how healthcare providers can aid in early disease detection to improve both patient outcomes and overall public health.

New Onset Positive Autoantibodies Following Covid-19 Infection, David Hernandez, Adnaan Sheikh, Shakira Laing, Mariana Adieb, Omar Siddiqui, Rohail Baig, Annabel Antonini, James Vienneau, Camden Burns

Advances in Clinical Medical Research and Healthcare Delivery

The World Health Organization (WHO) declared the novel coronavirus (COVID-19) outbreak a global pandemic on March 11, 2020. Since the original outbreak in December 2019, over 100 million people have been confirmed to have been infected by COVID-19 and over two million people have died. The presentation seen in patients may vary widely based on multiple factors. Fever has been reported in up to 99% of patients, while other common symptoms seen are dyspnea, fatigue, anosmia, and myalgia. Around 80% of COVID-19 patients present with a mild respiratory illness that can be managed at home, while around 15% need basic …

Uncommon Presentation Of Kaposi Sarcoma In An Hiv-Negative Patient: A Case Report And Review Of The Literature, Hope Daskalakis, Nina M. Ventura, Joy Anne Lowry, Mara Weinstein Velez

Advances in Clinical Medical Research and Healthcare Delivery

Kaposi Sarcoma (KS) is a multifocal systemic disease first identified in 1872. It most commonly involves the skin, mucous membranes, lymph nodes, and gastrointestinal tract. There are four clinically distinct subtypes of KS that have been identified: Chronic or classic KS, African endemic KS, KS due to iatrogenic immunosuppression, and AIDS-related epidemic KS. The human herpesvirus 8 (HHV-8) has been implicated in all subtypes of KS. We present a unique case of KS in a 79-year-old male with a widespread distribution of skin lesions on his palms, soles, chest, and back. This case report highlights a novel presentation of classical …

A Case Of Streptococcus Constellatus Bacteremia Secondary To Respiratory Syncytial Virus Bronchiolitis In A Neonate, Ronald G. Lott Iii, Samantha M. Lavertue, Xavier Zonna, Samuel Wlasowicz, Roland Zhang, Ravi Kavuda

Advances in Clinical Medical Research and Healthcare Delivery

Common causes of bacteremia in the neonatal period include group B streptococcus, listeria, and E. coli. We report a rare case of neonatal bacteremia with culture-positive Streptococcus constellatus. Streptococcus constellatus is part of the normal flora of the orogenital regions of the body; when found elsewhere, it causes pyogenic abscesses in the brain and digestive tract. In this case, the Streptococcus constellatus bacteremia was secondary to prolonged hospitalization in a patient with respiratory syncytial virus (RSV) bronchiolitis. This report serves to make physicians aware of and to define treatment options for Streptococcus constellatus as a rarely isolated organism that …

Covid-19-Associated Myocarditis: Screening For Early Diagnosis, Yousuf Khan, Salmman Ahmed, Samuel John Wlasowicz, Ronald G. Lott Iii, Xavier C. Zonna

Advances in Clinical Medical Research and Healthcare Delivery

The SARS-CoV-2 virus (causing COVID-19), has infected about 770 million people, and caused the death of about 6.9 million people worldwide in the span of three years (John Hopkins Resource Center). Common symptoms of a patient infected with the virus include shortness of breath, fever, chills, fatigue, loss of taste or smell, and muscle aches. However, recent studies have also shown a prevalence of patients presenting with cardiac inflammation (endocarditis, myocarditis or pericarditis) as a potential comorbidity, both during the infectious stage as well as after the infection has subsided. A pattern of specific clinical markers may be indicative of …

Targeting Cyp51 In The Treatment Of Acanthamoeba Keratitis, Ashkan Hassani, Vineet Sadarangani, Brad Haubrich

Annual Research Symposium

Acanthamoeba castellanii causes a rare but serious ocular infection called Acanthamoeba keratitis. Risk factors for infection include contact with contaminated water and poor hygiene of contact lenses. The first-line treatment is comprised of a months-long schedule of antibiotics. However, in cases where pharmacological interventions fail to address the infection, surgery may be necessary, with the continued risk of potential vision loss. Consequently, new treatments are needed, whether new pharmacological agents or new combination therapies with current agents. As an aerobic parasite, Acanthamoeba synthesizes ergosterol as a cell membrane insert, and ergosterol biosynthesis inhibitors (EBIs), common in antifungal pharmaceuticals, could potentially …

Microsporidiosis: Reviewing Clinical Presentation And Treatment Strategies, Julienne Zhou, Belinda Liu, Megan Dearmond, David Banach, Brad Haubrich

Annual Research Symposium

Microsporidiosis is an opportunistic infection caused by obligate intracellular pathogens within the taxon Microsporidia. Infection is zoonotic and has been associated with patients experiencing immunodeficiency, though incidence is increasing among other populations. Most commonly, the disease is gastrointestinal, typically by Enterocytozoon bieneusi and less commonly by Encephalitozoon intestinalis. Symptoms present with diarrhea and vomiting, and severe cases can lead to wasting and mortality. While the incorporation of anti-retroviral therapy for HIV patients has significantly decreased mortality in a subset of the vulnerable populations, treatment for microsporidiosis is still not standardized or well explored. Resistance to first-line treatment albendazole is increasing, …

Correction To: Should We Use Rifampicin In Periprosthetic Joint Infections Caused By Staphylococci When The Implant Has Been Exchanged? A Multicenter Observational Cohort Study, Tobias Siegfried Kramer, Alex Soriano, Sarah Tedeschi, Antonia Chen, Pierre Tattevin, Eric Senneville, Joan Gomez-Junyent, Victoria Birlutiu, Sabine Petersdorf, Vicens Diaz De Brito, Ignacio Sancho Gonzalez, Katherine Belden, Marjan Wouthuyzen-Bakker

Division of Infectious Diseases and Environmental Medicine Faculty Papers

No abstract provided.

Validation Of A Novel, Rapid Sepsis Diagnostic For Emergency Department Use, Hollis R. O'Neal, Roya Sheybani, David R. Janz, Robert Scoggins, Tonya Jagneaux, James E. Walker, Daniel J. Henning, Elizabeth Rosenman, Simon A. Mahler, Hariharan Regunath, Christopher S. Sampson, D. Clark Files, Richard D. Fremont, Michael J. Noto, Erica E. Schneider, Wesley R. Shealey, Matthew S. Berlinger, Thomas C. Carver, Morgan K. Walker, Nathan A. Ledeboer, Ajay M. Shah, Henry T.K. Tse, Dino Dicarlo, Todd W. Rice, Christopher B. Thomas

School of Medicine Faculty Publications

OBJECTIVES: To assess the in vitro IntelliSep test, a microfluidic assay that quantifies the state of immune activation by evaluating the biophysical properties of leukocytes, as a rapid diagnostic for sepsis. DESIGN: Prospective cohort study. SETTING: Five emergency departments (EDs) in Louisiana, Missouri, North Carolina, and Washington. PATIENTS: Adult patients presenting to the ED with signs (two of four Systemic Inflammatory Response Syndrome criteria, where one must be temperature or WBC count) or suspicion (provider-ordered culture) of infection. INTERVENTIONS: All patients underwent testing with the IntelliSep using ethylene diamine tetraacetic acid-anticoagulated whole blood followed by retrospective adjudication for sepsis by …

Covid-19 Hospital Mortality Among Patients With Invasive Mechanical Ventilation: A Comparison Between Public And Private Healthcare Services In San Luis Potosí 2020–2022, María E. Torres-Acosta, Rocío M. Cubos-Moncada, Alan Y. Martínez-Castellanos

The University of Louisville Journal of Respiratory Infections

Background: During 2019, México’s total public spending on health was 5.43% of the national gross domestic product, making it one of the countries of the Organisation for Economic Co-operation and Development that invested the least in developing public health systems. This study analyzes hospital mortality among intubated patients with laboratory-confirmed COVID-19 according to type of institution in San Luis Potosí, México, from March 18, 2020, to April 7, 2022.

Methods: This is a secondary data analysis of publicly available information about mortality among intubated patients with a laboratory-confirmed diagnosis of COVID-19 with respect to the type of hospitalization institution.

Results: …

Microbial Interactions Among Gardnerella, Prevotella And Fannyhessea Prior To Incident Bacterial Vaginosis: Protocol For A Prospective, Observational Study, Christina A. Muzny, Jacob H. Elnaggar, Lúcia G.V. Sousa, Ângela Lima, Kristal J. Aaron, Isaac C. Eastlund, Keonte J. Graves, Chaoling Dong, Olivia T. Van Gerwen, Meng Luo, Ashutosh Tamhane, Dustin Long, Nuno Cerca, Christopher M. Taylor

School of Graduate Studies Faculty Publications

Introduction The aetiology of bacterial vaginosis (BV), a biofilm-associated vaginal infection, remains unknown. Epidemiologic data suggest that it is sexually transmitted. BV is characterised by loss of lactic acid-producing lactobacilli and an increase in facultative and strict anaerobic bacteria. Gardnerella spp are present in 95%–100% of cases; Gardnerella vaginalis has been found to be more virulent than other BV-associated bacteria (BVAB) in vitro. However, G. vaginalis is found in women with normal vaginal microbiota and colonisation is not sufficient for BV development. We hypothesise that Gardnerella spp initiate BV biofilm formation, but incident BV (iBV) requires incorporation of other key …

Assessing Pattern Of The Pediatric Multisystem Inflammatory Syndrome (Pmis) In Children During The Covid-19 Pandemic: Experience From The Emergency Department Of Tertiary Care Center Of A Low-Middle-Income Country, Saleem Akhtar, Iqra Anis, Kumar Nirdosh, Muhammad Ihsan Tayyab Ihsan, Ahmed Raheem Buksh, Surraiya Bano

Department of Paediatrics and Child Health

Background: Pediatric Multisystem Inflammatory Syndrome (PMIS) is a hyperinflammatory condition affecting multiple organs in children, often resembling incomplete Kawasaki Disease during later phases of COVID-19 infection. Data on PMIS in low-middle-income countries, particularly in emergency department settings, is limited.
Objectives: This prospective observational study at Aga Khan University Hospital, Karachi, aimed to determine the frequency, clinical presentation patterns, and laboratory parameters of children with PMIS visiting the emergency department during the COVID-19 pandemic. Secondary objectives included assessing factors associated with in-hospital mortality.
Methods: From March 2020 to September 2021, patients meeting World Health Organization PMIS criteria were enrolled. COVID-19 testing …

Metabolic Syndrome And Obesity Among Marginalised School-Going Adolescents In Karachi, Pakistan: A Cross-Sectional Study, Hina Sharif, Sana Sharif Sheikh, Tooba Seemi, Hira Naeem, Unab Khan, Shah Sumaya Jan

Department of Family Medicine

Background: Metabolic syndrome (MetS) is a cluster of cardiometabolic risk factors which increase the likelihood of developing type 2 diabetes and cardiovascular disease. This study aimed to determine the prevalence of MetS among adolescents living in slums aged 11-18 years in Karachi, Pakistan.
Methods: Data were collected from 689 adolescents attending five schools in two slum areas of Karachi, Korangi and Baldia, from February 2023 to March 2023. Measurements of weight, height, waist circumference, and blood pressure were obtained from the study participants. Blood samples were collected to assess fasting plasma glucose, High density lipoprotein HDL-cholesterol, and triglyceride levels as …

Effectiveness Of Antibiotic Stewardship For Healthcare Providers At Urgent Care Clinics, Helen T. Adewole

Electronic Theses and Dissertations

Antibiotics have revolutionized modern medicine; however, the overuse in urgent care and primary care significantly contributes to the global burden of infections resistant to available antimicrobial medicines. Approximately 30% of the antimicrobials prescribed in acute care settings are unnecessary. Patient demand for antibiotics has seemingly skyrocketed following the recent COVID-19 pandemic. Practitioners must be knowledgeable about antibiotic stewardship initiatives, such as the wait-and-see approach, to reduce antibiotic overuse and improve the trajectory of antibiotic resistance and patient health outcomes. The gap in practice was the limited awareness of scientific evidence-based tools to partner with patients and improve antibiotic prescription patterns. …

Bacterial Contamination Of Platelet Products, Michael R Jacobs, Bowen Zhou, Aditi Tayal, Robert W Maitta

Journal Articles

Transfusion of bacterially contaminated platelets, although rare, is still a major cause of mortality and morbidity despite the introduction of many methods to limit this over the past 20 years. The methods used include improved donor skin disinfection, diversion of the first part of donations, use of apheresis platelet units rather than whole-blood derived pools, primary and secondary testing by culture or rapid test, and use of pathogen reduction. Primary culture has been in use the US since 2004, using culture 24 h after collection of volumes of 4-8 mL from apheresis collections and whole-blood derived pools inoculated into aerobic …

The Durability Of Antibody Responses Of Two Doses Of High-Dose Relative To Two Doses Of Standard-Dose Inactivated Influenza Vaccine In Pediatric Hematopoietic Cell Transplant Recipients: A Multi-Center Randomized Controlled Trial., Jennifer E. Schuster, Lubna Hamdan, Daniel E. Dulek, Carrie L. Kitko, Einas Batarseh, Zaid Haddadin, Laura S. Stewart, Anna Stahl, Molly Potter, Herdi Rahman, Spyros A. Kalams, Claire E. Bocchini, Elizabeth A. Moulton, Susan E. Coffin, Monica I. Ardura, Rachel L. Wattier, Gabriela Maron, Michael Grimley, Grant Paulsen, Christopher J. Harrison, Jason L. Freedman, Paul A. Carpenter, Janet A. Englund, Flor M. Munoz, Lara Danziger-Isakov, Andrew J. Spieker, Natasha B. Halasa, Pediatric Hct Flu Study

Manuscripts, Articles, Book Chapters and Other Papers

BACKGROUND: Our previous study established a 2-dose regimen of high-dose trivalent influenza vaccine (HD-TIV) to be immunogenically superior compared to a 2-dose regimen of standard-dose quadrivalent influenza vaccine (SD-QIV) in pediatric allogeneic hematopoietic cell transplant (HCT) recipients. However, the durability of immunogenicity and the role of time post-HCT at immunization as an effect modifier are unknown.

METHODS: This phase II, multi-center, double-blinded, randomized controlled trial compared HD-TIV to SD-QIV in children 3-17 years old who were 3-35 months post-allogeneic HCT, with each formulation administered twice, 28-42 days apart. Hemagglutination inhibition (HAI) titers were measured at baseline, 28-42 days following each …

Targeted Repression Of Topa By Crispri Reveals A Critical Function For Balanced Dna Topoisomerase I Activity In The Chlamydia Trachomatis Developmental Cycle, Li Shen, Leiqiong Gao, Abigail R. Swoboda, Scot P. Ouellette

School of Medicine Faculty Publications

Chlamydia trachomatis is an obligate intracellular bacterium that is responsible for the most prevalent bacterial sexually transmitted infection. Changes in DNA topology in this pathogen have been linked to its pathogenicity-associated developmental cycle. Here, evidence is provided that the balanced activity of DNA topoisomerases contributes to controlling Chlamydia developmental processes. Utilizing catalytically inactivated Cas12 (dCas12)-based clustered regularly interspaced short palindromic repeats interference (CRISPRi) technology, we demonstrate targeted knockdown of chromosomal topA transcription in C. trachomatis without detected toxicity of dCas12. Repression of topA impaired the developmental cycle of C. trachomatis mostly through disruption of its differentiation from a replicative form …

Interplay Between Acetylation And Ubiquitination Of Imitation Switch Chromatin Remodeler Isw1 Confers Multidrug Resistance In Cryptococcus Neoformans, Yang Meng, Yue Ni, Zhuoran Li, Tianhang Jiang, Tianshu Sun, Yanjian Li, Xindi Gao, Hailong Li, Chenhao Suo, Chao Li, Sheng Yang, Tian Lan, Guojian Liao, Tongbao Liu, Ping Wang, Chen Ding

School of Medicine Faculty Publications

Cryptococcus neoformans poses a threat to human health, but anticryptococcal therapy is hampered by the emergence of drug resistance, whose underlying mechanisms remain poorly understood. Herein, we discovered that Isw1, an imitation switch chromatin remodeling ATPase, functions as a master modulator of genes responsible for in vivo and in vitro multidrug resistance in C. neoformans. Cells with the disrupted ISW1 gene exhibited profound resistance to multiple antifungal drugs. Mass spectrometry analysis revealed that Isw1 is both acetylated and ubiquitinated, suggesting that an interplay between these two modification events exists to govern Isw1 function. Mutagenesis studies of acetylation and ubiquitination sites …