Medical Specialties Commons^™

Clinical Characteristics, Antibiotic Resistance Trends, And Associated Molecular Epidemiology Traits In Escherichia Coli Isolates Producing Neonatal Bacteremia, Keerti Ivaturi, Christine Symes, Mina Farahbakhsh, Sanjula Bhuri, Joshua L Wheatley, Rangaraj Selvarangan, Daniel P. Heruth, Susana Chavez-Bueno

Manuscripts, Articles, Book Chapters and Other Papers

BACKGROUND: Escherichia coli is a leading cause of neonatal sepsis. This study's objective was to investigate the clinical characteristics of newborns with E. coli bacteremia, and recent antibiotic resistance trends and molecular epidemiologic features of these invasive strains.

METHODS: Clinical data and blood E. coli isolates collected from 54 neonates with bacteremia were studied. E. coli antibiotic susceptibility trends over time, and whole-genome sequencing data relevant to the genomic relatedness and capsule genotype of the isolates were analyzed.

RESULTS: Thirty percent of bacteremic newborns were preterm. Mortality was 19% in preterm versus 5% in term infants. Cerebrospinal fluid was collected …

Mif-Cd74 Signaling Drives Immune Modulation In Medulloblastoma, Benjamin Draper, Zhen You, Dean Thompson, Xu Guo, Alaide Morcavallo, Diego Chillon Pino, Carlos Lorenzo Gido Nery, Sumana Shrestha, Chantelle E Bowers, Courtney Himsworth, Alberto Delaidelli, Bethany Remeniuk, Sonia Morlando, Brandon Wade, Freya Gordon, Yara Sanchez-Corrales, Bei Hopkins, Natalie Monteiro, Darren Locke, Miao Liu, Jacob Torrejon Diaz, Kevin Greenslade, Barbara Martins Da Costa, Karen Barker, Colin Kwok, Olumide Ogunbiyi, Anya Fletcher, Stacey Richardson, Carlos Custodia, Rafael Roque, Thomas Jackson, Regan Barfoot, Sergi Castellano, Rebecca M Hill, Olivier Saulnier, Thomas S Jacques, Michael D Taylor, Claudia C Faria, Olivier Ayrault, Poul H Sorensen, John Anderson, Louis Chesler, L Frank Huang, Steven C Clifford, Laura K Donovan

Faculty, Staff and Students Publications

Background: Relapsed medulloblastoma remains a significant therapeutic challenge as it is near universally fatal. The tumor microenvironment of medulloblastoma plays a critical role in tumor progression, influencing tumor growth, immune evasion, and therapeutic resistance. We hypothesized that defining tumor-immune interactions in diagnostic and relapsed medulloblastoma may uncover mechanisms of immune evasion and identify novel therapeutic targets.

Methods: We analyzed paired primary and recurrent RNA-sequencing data from 140 medulloblastoma patients to profile immune cell composition and validate spatial relationships within the TME. To identify key tumor-immune interactions, we developed a novel algorithm to detect receptor-ligand pairs using single-cell RNA-sequencing data. These …

Plasma Proteins Associated With Psychosocial Factors And Heart Disease: The Jackson Heart Study, Sara N O'Brien, Madeline G Gillman, Michael D Green, Daniel E Cruz, James S Floyd, Susan Hankinson, Daniel H Katz, Xiaojuan Liu, Michelle C Odden, Bruce M Psaty, Alexander P Reiner, Jerome I Rotter, Stephen S Rich, Robert E Gerszten, Amil Shah, Mario Sims, Usman A Tahir, Lesley F Tinker, Alexis C Wood, Bing Yu, Anthony S Zannas, Laura M Raffield, Láshauntá M Glover

Faculty, Staff and Students Publications

Background: Knowledge of proteomic mechanisms explaining the link between psychosocial stress and cardiovascular disease is limited. This study aimed to (1) identify plasma proteins associated with psychosocial factors and (2) assess associational pathways between psychosocial factors, identified proteins, and incident cardiovascular disease events in a discovery cohort, JHS (Jackson Heart Study), and 2 replication cohorts, the CHS (Cardiovascular Health Study), and the MESA (Multi-Ethnic Study of Atherosclerosis).

Methods: JHS participants from exam 1 (2000-2004) with SomaScan 1.3k platform proteomics data were included (n=2143, mean age=55.3). Depressive symptoms and perceived stress scores were measured via the 20-item Center for Epidemiological Studies …

Dnajb9-Positive Fibrillary Glomerulonephritis In A Patient With Longstanding Discoid Lupus Erythematosus: A Rare Association, Seyedah Simi Daryabari, Abhishek Vadhar, Sally Othman, Brahmani Tata, Towfiqul Chowdhury, Sujata Kambhatla, Chadi Saad

Conference Presentation Abstracts

Fibrillary glomerulonephritis (FGN) is a rare primary glomerular disease characterized by the organized deposition of nonamyloid, randomly arranged fibrils within the mesangium and glomerular basement membrane. While FGN is frequently associated with malignancies and chronic infections, its association with the autoimmune spectrum is emerging as a critical clinical entity. Specifically, the relationship between DNAJB9-positive FGN and discoid lupus erythematosus (DLE) is exceedingly rare, as renal manifestations in lupus patients are typically attributed to immune-complex-mediated lupus nephritis. We present the case of a 67-year-old female with a longstanding history of DLE, manifesting as cutaneous lesions on the extremities and scalp with …

Rethinking Mixed Dka-Hhs: An Extreme Presentation Of Hyperosmolar Hyperglycemic State, Sajith Silva, Umair Malik, Amin Pasha, Sujata Kambhatla

Conference Presentation Abstracts

Introduction: The American Diabetes Association (ADA) recognizes diabetic ketoacidosis (DKA) and hyperglycemic hyperosmolar state (HHS) as life-threatening hyperglycemic emergencies that can overlap clinically; approximately 10% of presentations are described as mixed DKA–HHS. Because current guidelines do not define a single “mixed” category, overlap is best understood as concurrent fulfillment of key elements of both syndromes: DKA-type anion-gap metabolic acidosis with ketonemia or ketonuria, together with HHS-type severe hyperglycemia, hyperosmolality, and dehydration. We report an extreme HHS presentation (glucose >2,100 mg/dL) with limited DKA overlap. Case Description: A 34-year-old woman with longstanding type 1 diabetes mellitus managed with an insulin pump, …

Targeted Therapy With Braf/Mek Inhibitors And Immune Check Point Inhibitors In Anaplastic Thyroid Cancer - A Case Report, Yagnapriya Ammakola, Muhammad Ibrahim Majeed, Ishmael Jaiyesimi

Conference Presentation Abstracts

Introduction- Anaplastic thyroid carcinoma (ATC) is a highly aggressive malignancy constituting about 1% of all the thyroid neoplasms. It has poor prognosis with median survival of around 3 to 6 months. Recent advancements with targeted therapies have improved the survival outcome in these patients. We report a case of anaplastic transformation of papillary thyroid cancer with BRAF V600E mutation who responded to targeted therapy. Case presentation- A 54 year old male presented with a palpable left sided mass. Labs were unremarkable but imaging with contrast enhanced CT scan showed a 3 cm left thyroid nodule with bilateral cervical lymphadenopathy. Biopsy …

Late Hepatitis B Reactivation After Hsct And B-Cell Depleting Therapy: Case Vignettes Challenging Fixed-Duration Prophylaxis, Ariana Cho, Harrison Moses, Muaz Alchirazi, Vishakh Keri, Lea Monday

Conference Presentation Abstracts

Hepatitis B virus (HBV) reactivation remains a critical concern in immunosuppressed oncology and hematopoietic stem cell transplant (HSCT) patients, yet the optimal duration of antiviral prophylaxis is unresolved. Current guidelines recommend 12–18 months of prophylaxis after HSCT or B-cell depleting therapy for patients who are isolated anti-HBc positive, based on documented cases of late reactivation beyond the traditional 12-month threshold. However, these recommendations largely derive from studies in HBsAg-positive patients or those receiving rituximab-containing regimens, with limited data addressing the broader range of high-risk scenarios encountered in practice. We present two vignettes highlighting this gap. Patient 1 is a 60-year-old …

A Rare Price Of Pain Control: Methemoglobinemia From A Lidocaine Patch, Sushmita Mantravadi, Kesava Mankikanta Achuta, Aaron Goyal, Amin Pasha, Abed L. Dabaja

Conference Presentation Abstracts

Introduction The overall prevalence of methemoglobinemia is around 0.035%. Methemoglobinemia is a rare but potentially life-threatening complication of local anesthetic use. While all patients are at risk, those with cardiac or pulmonary compromise are more susceptible to developing clinical manifestations. We report a case of acquired methemoglobinemia following topical lidocaine patch application for post-operative pain management in an elderly patient. Case Presentation 84-year-old male with a past medical history of aortic stenosis status post Transcatheter aortic valve replacement, Coronary artery disease, gastrointestinal bleed due to colon polyps, obstructive sleep apnea, chronic kidney disease, trigeminal neuralgia, obesity, essential hypertension, chronic atrial …

Mycobacterium Chimaera In A Young Patient Without Underlying Cardiac Surgery History, Kate A. Szczesniak, Rakesh Shah, Malitha Hettiarachchi

Conference Presentation Abstracts

Introduction/Objective Mycobacterium chimaera (M. chimaera), within the Mycobacterium Avium Complex (MAC), is a slow-growing nontuberculous mycobacterium (NTM) species that is most often characterized by nonspecific symptoms of night sweats, fever, and fatigue. Due to the nonspecific symptoms of M. chimaera and the rarity of this infection, delayed or misdiagnosis occurs in these patients. Risk factors of contaminated heater-cooler units used in cardiac surgery have been reported; however, cases without this exposure, such as this case, have been cited less commonly. This case of M. chimaera will present a young patient initially presenting with dyspnea who was found to have a …

Esophageal Diverticulum Presenting As Chest Pain In A Patient With Significant Cardiac History: A Diagnostic Challenge, Sujan Shrestha, Alnimer Khabbab, Kamal Khalil, Malitha Hettiarachchi

Conference Presentation Abstracts

Introduction: Esophageal diverticula are uncommon structural abnormalities that may present with nonspecific symptoms such as dysphagia, regurgitation, and chest discomfort. It accounts for < 5% of all cases of dysphagia. In elderly patients with significant cardiac comorbidities, chest pain and dysphagia may be initially attributed to cardiovascular pathology, potentially delaying the correct diagnosis. This case highlights the importance of comprehensive history taking in identifying esophageal diverticulum as an alternative etiology of chronic symptoms. Case presentation: A 77-year-old female with a history of atrial fibrillation, unstable angina, chronic obstructive pulmonary disease, hypertension, and diastolic heart failure presented with chest pain. Given her significant cardiac history, she underwent extensive cardiac evaluation, including serial troponins, electrocardiography, echocardiography, and stress testing, all of which showed no evidence of acute ischemia. Further history revealed intermittent dysphagia to both solids and liquids for over three years, occurring approximately twice weekly. The patient described a sensation of food getting stuck in her throat, occasionally requiring expectoration. Gastroenterology was consulted, and esophagogastroduodenoscopy revealed minimal esophagitis with a distal esophageal diverticulum. The patient was managed conservatively with pantoprazole 40 mg daily, resulting in symptomatic improvement. Discussion: Esophageal diverticula are often associated with underlying esophageal motility disorders and can present with dysphagia to both solids and liquids. Symptoms may mimic or coexist with cardiopulmonary complaints, particularly in elderly patients with multiple comorbidities. While barium esophagography remains the diagnostic modality of choice, endoscopy can identify associated mucosal pathology and confirm the diagnosis. Management is individualized based on symptom severity and diverticulum size, with conservative therapy appropriate for mildly symptomatic patients. Conclusion: This case underscores the importance of considering esophageal diverticulum in the differential diagnosis of chronic dysphagia and chest discomfort, even in patients with significant cardiac disease. Careful history taking and multidisciplinary evaluation are essential to avoid misattribution of symptoms and to ensure timely diagnosis and appropriate management.

Acute Myocardial Injury And Vasospastic Stunning Following A Grand Mal Seizure, Aaron Goyal, Kirill Ruban, Ishan Kirti, Karina Ruban, Fadi Saab, Pranay Gupta, Sujata Kambhatla

Conference Presentation Abstracts

Acute non-ischemic myocardial injury results from myocardial oxygen supply-demand mismatch in the absence of critical coronary stenosis or atherothrombotic plaque rupture, and may be precipitated by acute physiologic stress, including sustained sympathetic overactivity. Troponin elevation may occur in 6.7-10.9% of post-seizure cases, with higher incidence among the elderly and individuals with cardiovascular risk factors. We present the case of a 55-year-old woman with long-standing epilepsy, dyslipidemia, multiple sclerosis treated with ocrelizumab, and significant cardiovascular risk factors (20 pack-year smoking history, occasional alcohol use, family history of early myocardial infarction) who presented to the emergency room after a witnessed generalized tonic-clonic …

Sleep In Children In Foster Care: A Scoping Review, Juan Castellanos, Anna Wani, Jill Mcleigh

Health Status, Outcomes, and Literacy and Healthcare Utilization

Although the focus on sleep disturbances in children who have experienced adversity has increased, little is known about sleep among children in foster care (CFC). This study aimed to review what research tells us about the relationship between foster care experience and sleep disturbances and to identify knowledge gaps.

For questions about this study or others, please email [email protected]

childrens.com/fostercare

Co-Location Of Substance Use Disorder Treatment And Hospital Emergency Departments, Leila Hasan

Honors College Theses

Patients with substance use disorder (SUD) rely heavily on the hospital emergency department (ED) for acute care and are often discharged from the ED without access to long-term recovery resources. This project explores the impact of co-located addiction treatment programs with hospital EDs on recovery outcomes of patients with SUD. A systematic literature review conducted on relevant studies indicates that co-located programs can be effective in increasing treatment initiation and maintenance, reducing ED revisits, and reducing repeated overdose in SUD patients. Programs that were most effective included three key elements: fast linkage of SUD patients to program staff in the …

Residency As A Rite Of Passage: Assessing Liminality In Night Float And Improving Competency Evaluations, Lily Anderson-Chavarria, James Meza, Frank Mueller, Jianming Lau

Conference Presentation Abstracts

Purpose/Background: ACGME emphasizes competency-based evaluation of post-graduate education. However, written evaluations using averaged Likert Scales with minimal anchoring to real experiences is a sub-optimal method of evaluating resident competence. Through qualitative research, we explored resident’s own reflections on their transition into competent physicians and attempted to identify an alternative model for resident assessment. Based on informal observations, we predicted that night float rotations in the second-year curriculum are determinative for residents to achieve competence in clinical care. We further hypothesized that residents’ experiences mirror a Rite of Passage marked by rituals of separation, transition and reintegration, with night float serving …

Training Fm Residents In Prep Is "Hiv Possible", M Ellis Jaruzel, Carlie Nikel

Conference Presentation Abstracts

Pre-Exposure Prophylaxis (PrEP) offers the promise of dramatically reducing the risk of HIV transmission. Institutions in public health believe that PrEP is key to ending the HIV epidemic and improving access is central to this program. Prior literature has suggested that discomfort discussing sexual behaviors and STIs inhibit prescribing PrEP in primary care settings. Given the anticipated need for competent prescription of PrEP in primary care settings as a future routine part of clinical practice, a large (10/10/10) midwestern family medicine residency program designed and implemented a sexual health and PrEP OSCE in consultation with experts from the state (Michigan) …

Understanding Delays In Emergency Department Care: A National Analysis Of Wait Times, Gregory Forsberg

Mathematics, Statistics, and Computer Science Honors Projects

Emergency department (ED) wait times remain a persistent bottleneck in the United States healthcare system, impacting patient outcomes, hospital efficiency, and equitable access to care. This study analyzes nationally representative data from the National Hospital Ambulatory Medical Care Survey (NHAMCS), a complex, multi-stage probability sample. Using survey-weighted analyses and predictive modeling, we examine the effects of patient characteristics, triage acuity, and visit timing. Results indicate that operational and system-level factors, including hospital capacity, geographic region, and temporal variation, are among the most influential predictors of ED wait times

Pattern Dynamics And Stochasticity Of Brain Rhythms And Spike Trains In A Tauopathy Mouse Model Of Alzheimer’S Disease, Clarissa M. Hoffman

Dissertations and Theses (Open Access)

Systems neuroscience posits that every aspect of perceived physical reality, every aspect of animal and human behavior, and every cognitive phenomenon emerges from patterns of neuronal activity. While most researchers embrace this idea, there are major difficulties in describing and analyzing these complex neuronal dynamics—spike flows produced by cells ensembles, synchronized extracellular field oscillations, and other patterns—which limits our understanding of how the activity of individual neurons and the whole-animal cognition and behavior might be connected. In particular, we lack the approaches and even the semantics for connecting the individual cell outputs and the integrated results of their activity. Current …

Technical Development, Optimization, And Clinical Implementation Of Quantitative Magnetic Resonance Imaging Methods For Radiation Oncology, Lucas Mccullum

Dissertations and Theses (Open Access)

Magnetic resonance imaging (MRI) has gradually grown more important in the field of radiation oncology. This paradigm shift has grown from initial experiments with MRI of cancerous lesions in the early 1970s, to the integration of MRI images for radiation therapy treatment planning (i.e., MRI-Simulation) in the early 1980s, to the combined MRI linear accelerator (MR-Linac) becoming commercially available in 2018 which can simultaneously image a tumor and treat it with radiation. However, due to its novelty in radiation oncology, its full potential for the integration of quantitative MRI-based biomarkers has yet to be fully realized.

Therefore, this dissertation will …

A Global Prospective Harmonization Framework For Suicidality, Anhedonia, And Obsessive-Compulsive Symptoms In Psychiatric Genetic Studies: A Cross-Continental Study Within The Ancestral Population Network, Ana Diaz-Zuluaga, Jacey Anderberg, Ana Ramirez-Diaz, Andrea Marques, Catherine Rast, Daniel Bustamante, Deborah Jonker, Johanna Valencia-Echeverry, Stella Gichuru, Lukoye Atwoli

Internal Medicine, East Africa

This study aims to prospectively collect harmonized, quantitative, and dimensional psychiatric phenotypes (suicidality, anhedonia, and obsessive-compulsive symptoms) and information on discrimination, stigma, and unfair treatment in up to 27,500 individuals across diverse ancestries and clinical populations for genetic analysis within the NIMH Ancestral Population Network (APN). Five APN projects are participating in the current study (PUMAS-Paisa, PUMAS-NeuroGAP, KOMOGEN-D, LATINO, and SAX-II), spanning recruitment over 15 countries across the Americas, Africa, and Asia. Participants are being enrolled via the recruitment protocols specific to each participating project. The harmonized clinical battery includes the Columbia-Suicide Severity Scale, Snaith-Hamilton Pleasure Scale, and Florida Obsessive-Compulsive …

Qualitative Beta-2-Adrenoceptor Signaling In The Regulation Of Human Airway Epithelia Mucin And Cytokine Production, Fred Graumuller, Diana Cervantes, Tung O. Chan, Niccolette Schaunaman, Dominic R. Villalba, Burton F. Dickey, Julia K. L. Walker, Hong Wei Chu, Raymond B. Penn

Division of Pulmonary, Allergy, and Critical Care Medicine Faculty Papers

BACKGROUND: Numerous in vivo studies have demonstrated beta-2-adrenoceptor (β2AR) -agonism as permissive in the development of allergic lung inflammation, and have implicated the arrestin-dependent signaling arm of the β2AR in mediating this effect. However, the specific cell type(s) mediating β2AR regulation of allergic lung inflammation remain unestablished.

METHODS: To explore the potential contribution of airway epithelia in this phenomenon, we compared the ability of ractopamine (RP), recently identified as a Gs-biased beta-agonist, to that of the unbiased/balanced beta-agonist albuterol (ALB), on IL-13-stimulated mucin and cytokine production in human airway epithelia cultures in air-liquid interface (HAE).

RESULTS: ALB, which activates both …

A Systematic Review And Meta-Analysis On The Levels Of Supportive Care Needs In Adults With Cancer, Caroline B. Silveira, Rech, Maria Petropoulou, Pietro S. Rössler, Francine F. De Souza, Helena B. Böhmer, Amanda L. Giacomet, Richard Alejandro B. De Barros, Lucélia De C. De Barros, Vagner R.Z.B. Pereira, Nanci Da S.T. Junqueira, Pedro Lopez

Research outputs 2022 to 2026

Objective: To estimate the levels of supportive care needs among adults with cancer using the Supportive Care Needs Survey–Short Form 34 (SCNS-SF34) and to examine demographic, clinical, and treatment-related determinants. Methods: A systematic review and meta-analysis was conducted (CRD42024604977). Studies reporting SCNS-SF34 scores in adults with cancer were included. Searches were performed across six different databases (November 2024; updated August 2025). Random-effects meta-analyses were undertaken to estimate the pooled mean scores across the five SCNS-SF34 domains and total score. Subgroup and meta-regression analyses explored potential determinants. Results: Ninety-five studies (n = 32,493) were analysed. The unmet needs observed tended to …

Natural Maternal Immunity Protects Neonates From Escherichia Coli Sepsis., Raymond E. Diep, Ujjwal Adhikari, Kubra Gokce Tezel, Giang Pham, Allison R. Burrell, Mary A. Staat, Nguyen Thi Khanh Nhu, Minh-Duy Phan, Kate M. Peters, Mark A. Schembri, Scott H. Saunders, David B. Haslam, John J. Erickson, Susana Chavez-Bueno, Sing Sing Way

Manuscripts, Articles, Book Chapters and Other Papers

Escherichia coli is a leading cause of neonatal sepsis, with infection occurring in approximately one in every 1,000 live births. However, with E. coli colonization beginning soon after birth and defects in neonatal host defence maturation, an alternative consideration is why infection does not occur even more frequently. Here we show that newborn babies with E. coli sepsis have selectively reduced vertically transferred natural antibodies that recognize E. coli, mechanistically explaining their susceptibility to infection. Complementary preclinical studies show that preconceptual intestinal colonization with probiotic E. coli Nissle 1917 (EcN) primes anti-E. coli immunoglobulin G (IgG) antibodies with broad cross-reactivity …

Regional Variation Of Underlying Kidney Diseases In Children Undergoing Chronic Kidney Replacement Therapy Around The Globe., Dagmara Borzych-Dużałka, Marjolein Bonthuis, Uma Ali, Yok-Chin Yap, Michael Manno, Yihui Zhai, Reyner Loza, Seema Hashmi, Naye Choi, Kenza Soulami, Judith Exantus, Mohamed S. Al Riyami, Sameh Mabrouk, Marbella Ma Angeles, Cristina Zelaya-Camacho, Henny Adriani Puspitasari, Syed Saimul Huque, Francisco Cano, Kar Hui Ng, Sevcan A. Bakkaloğlu, Jerome Harambat, Kitty J. Jager, Bradley A. Warady, Franz Schaefer

Manuscripts, Articles, Book Chapters and Other Papers

BACKGROUND: There is a scarcity of information regarding the distribution of the diseases leading to kidney failure (KF) in children living in the emerging world. We used registry data to provide a global overview of the underlying disease spectrum in children commencing kidney replacement therapy (KRT).

METHODS: We analyzed KF causes among 23,620 children and adolescents commencing maintenance KRT in 80 countries, using data from the IPNA Global KRT Registry (including ESPN/ERA Registry), the International Pediatric Dialysis Network (IPDN), the United States Renal Data System (USRDS), and the Australia and New Zealand Dialysis and Transplant Registry (ANZDATA). The analysis considered …

Ai-Powered Insights In Pediatric Nephrology: Current Applications And Future Opportunities., Arwa Nada, Yamen Ahmed, Jieji Hu, Darcy K. Weidemann, Gregory H. Gorman, Eva Glenn Lecea, Ibrahim A. Sandokji, Stephen Cha, Stella Shin, Salar Bani-Hani, Sai Sudha Mannemuddhu, Rebecca L. Ruebner, Aadil Kakajiwala, Rupesh Raina, Roshan George, Rim Elchaki, Michael L. Moritz, The American Society Of Pediatric Nephrology Quality Improvement And Artificial Intelligence (Aspn Qi/Ai) Interest Group

Manuscripts, Articles, Book Chapters and Other Papers

Artificial intelligence (AI) is rapidly emerging as a transformative force in pediatric nephrology, enabling improvements in diagnostic accuracy, therapeutic precision, and operational workflows. By integrating diverse datasets-including patient histories, genomics, imaging, and longitudinal clinical records-AI-driven tools can detect subtle kidney anomalies, predict acute kidney injury, and forecast disease progression. Deep learning models, for instance, have demonstrated the potential to enhance ultrasound interpretations, refine kidney biopsy assessments, and streamline pathology evaluations. Coupled with robust decision support systems, these innovations also optimize medication dosing and dialysis regimens, ultimately improving patient outcomes. AI-powered chatbots hold promise for improving patient engagement and adherence, while …

Factors Associated With Postpartum Depression Symptoms Following Antepartum Hospitalization, Alison N Goulding, Daniel Palacios, Sukru Aras, Hu Chen, Sasidhar Pasupuleti, Marika Toscano, Nicole Cirino, Israel C Christie, Zhandong Liu, Emily S Miller, Terri L Fletcher

Duncan NRI Faculty and Staff Publications

Background: Hospitalized antepartum patients are at increased risk for postpartum depression (PPD). Developing approaches to identify those at highest risk for PPD would enable timely and targeted intervention.

Objective: We aimed to identify factors associated with the development of PPD symptoms in hospitalized antepartum patients and to assess their predictive utility.

Study design: This retrospective cohort study included pregnant individuals hospitalized in a regional referral center due to medical or obstetric complications between 2012 and 2025. Data were extracted from the electronic health record, including demographics, medical and obstetric history, hospitalization characteristics, and postpartum Edinburgh Postnatal Depression Scale (EPDS) scores …

Low-Abundance And Fragmentary Helicobacter Pylori Dna Detected In Phenotypically Negative Gastric Biopsies Using Targeted Sequencing, Fabien Mbaya-Tshibangu, Alain Cimuanga-Mukanya, Evariste Tshibangu-Kabamba, Nadine Kayiba-Kalenda, Tressy Kalenga-Ngomba, Patrick Ngoma-Kisoko, Gunturu Revathi, Junko Akada, Benoît Mbiya-Mukinayi, Augustin Tshibaka Kabongo

Pathology, East Africa

Accurate detection and monitoring of antimicrobial resistance (AMR) in Helicobacter pylori mainly rely on phenotypic methods and culture, which can sometimes fail when bacterial load is low or after recent treatment. We investigated whether gastric biopsies classified as H. pylori-negative by standard diagnostic techniques still contain detectable bacterial DNA, including regions linked to AMR, and assessed whether selected DNA fragments can mediate allelic exchange in vitro. Gastric biopsies from 46 dyspeptic patients in the Democratic Republic of the Congo (including 23 phenotypically positive and 23 phenotypically negative individuals) were analyzed using long-read amplicon sequencing of seven resistance-associated loci, selective whole-genome …

Social Correlates Of Trauma And Posttraumatic Stress Disorder: The Importance Of Context, Lukoye Atwoli, Linnet Ongeri

Internal Medicine, East Africa

Understanding trauma and posttraumatic stress disorder (PTSD) requires a contextual perspective that considers historical legacies, social environments, and cultural realities. This paper draws on empirical evidence from Kenya and Uganda to demonstrate the limitations of applying trauma frameworks developed in high-income countries to African contexts. Findings from the Orphaned and Separated Children’s Assessment Related to Their Health and Well-Being (OSCAR) study challenge assumptions about care environments. The study reveals higher PTSD rates among orphans in family-based settings compared to institutional care, and highlights the protective roles of religion and social support. The Neuropsychiatric Genetics of African Populations-Psychosis (NeuroGAP-Psychosis) study provides …

Potential Impact Of Parasites In The Transmission Of Chronic Wasting Disease, Paulina Soto, Rodrigo Morales

Faculty, Staff and Student Publications

No abstract provided.

Optimized Ultrasound Imaging Of Phase-Change Nanodroplets, Charles R Dyall, Dmitry Nevozhay, Andy Liu, Trevor M Mitcham, George J Lu, Konstantin V Sokolov, Richard R Bouchard

Faculty, Staff and Student Publications

Phase-change nanodroplets (PCNDs) continue to generate significant research interest due to their potential to extravasate into tissue, to be targeted for molecular imaging and drug delivery, and to undergo an induced phase-change to "activated" microbubbles (MBs) for ultrasound (US) imaging. To accurately quantify molecular markers, however, one assumes a consistent proportion of PCNDs in a region of interest (ROI) are stably activated and imaged. Herein we present a framework for developing a diagnostic sequence that is optimized for PCND activation uniformity, contrast, and acquisition time. To develop this framework, activation was examined at three scales of increasing complexity: single, adjacent, …

Growth Hormone Pathway As A Prognostic And Therapeutic Biomarker In Patients With Unresectable Hepatocellular Carcinoma Treated With Radiation Therapy, Joe R Eid, Safa Kaseb, Lianchun Xiao, Ryan Sun, Mahesh Kumar Kannan, Manal Hassan, Asif Rashid, Hop S Tran Cao, Hesham M Amin, Eugene J Koay

Faculty, Staff and Student Publications

Purpose: Radiation therapy (RT) has emerged as an effective local therapy option for patients with unresectable hepatocellular carcinoma (HCC) and is associated with improved overall survival (OS). However, some patients still have poor outcomes after RT, and biomarkers are needed to stratify prognostic groups. High circulating growth hormone (GH) levels promote HCC proliferation and survival and are associated with aggressive disease. In this study, we evaluated whether pretreatment GH levels are associated with OS and progression-free survival (PFS) in patients who underwent RT for unresectable HCC.

Methods and materials: Patients undergoing RT for HCC during 2017-2023 were identified from a …