Bacterial Infections and Mycoses Commons^™

Understanding The Immune Responses Of Macrophages And Neutrophils In Synovial Fluid And Post-Operative Joint Environments, Allison Noelle Snyder

Rowan-Virtua Research Day

Periprosthetic joint infections (PJI) are devastating complications of total joint replacement (TJA). Even with aggressive antibiotic treatments, PJI recurrence rates are >17%, and 5-year survival is only 87.3%. Understanding the levels of inflammatory markers and cell types present at different timepoints is crucial in maximizing antimicrobial therapy and preventing adverse outcomes following TJA. This study tests the hypothesis that the synovial fluid environment of PJI induces immunosuppression in human macrophages, thereby hindering their ability to kill bacteria.

Resensitization Of Clinical Isolates Of Mdr-Acinetobacter Baumannii To Antibiotics Using Bacteriophage Therapy, Priyal Gajera, Valerie J. Carabetta

Rowan-Virtua Research Day

Introduction:

Antibiotic resistance poses a major global health threat, particularly with multidrug-resistant (MDR) pathogens such as Acinetobacter baumannii, which exhibits resistance to multiple antibiotic classes, including carbapenems.¹ As conventional treatments become less effective, alternative therapies such as bacteriophage therapy are gaining attention. Bacteriophages offer targeted antibacterial activity and may enhance antibiotic efficacy or resensitize resistant strains. This study investigates the synergistic effects of bacteriophage ΦCO03 combined with antibiotics against MDR A. baumannii.

Methods:

Clinical isolates (M20, M5) of A. baumannii were cultured in LB broth at 37°C. Bacteriophage ΦCO03 was isolated and purified using plaque assays. Synergy between phage …

Sonidegib (Lde225) Reduces Inflammatory Signaling And Preserves Taste Buds In A Sepsis Mouse Model, Ashlyn Mcclelland, Murod Khikmatov, Archana Kumari, Gabrielle Audu, Isaiah Nawaz, Kingsley Yin

Rowan-Virtua Research Day

Background:

Sepsis triggers a complex and widespread inflammatory response that disrupts multiple organ systems, including the taste organ. Loss of taste is a symptom recognized in sepsis survivors and has the potential to contribute to further complications such as anorexia. Prior work from our lab demonstrated that cecal ligation and puncture (CLP) in mice induces immune cell infiltration and alters taste bud morphology in the fungiform papillae located in the anterior tongue. We hypothesize that similar deleterious effects occur in the circumvallate papillae (CVP) of the posterior tongue and that the usage of the smoothened inhibitor, sonidegib, could reduce these …

Case Report: Necrotizing Pneumonia, Veroneka Mikhail Md

Rowan-Virtua Research Day

Necrotizing pneumonia is an uncommon but severe complication of community-acquired pneumonia (CAP), characterized by progressive parenchymal liquefaction, cavitation, and destruction of normal lung architecture, and associated with significant morbidity and mortality. Clinicaly, early presentations may be indistinguishable from uncomplicated pneumonia (pna), with fever, cough, pleuritic chest pain, and dyspnea, which can delay recognition in the emergency department. Differential diagnosis for these symptoms is broad and includes uncomplicated pneumonia, septic emboli, lung abscesses, and pleural effusion. However, patients effected with necrotizing pneumonia often exhibit more severe systemic toxicity, rapid progression of respiratory failure, and hemodynamic instability. In this case report, we …

Tuberculosis In Long-Term Asian American Immigrant Residents: Trends And Risk Factors In Cases Diagnosed ≥10 Years After U.S. Arrival, Katherine Xie, Kai Mon Lee, Todd Schachter

Rowan-Virtua Research Day

Tuberculosis in Long-Term Asian American Immigrant Residents: Trends and Risk Factors in Cases Diagnosed ≥10 Years After U.S. Arrival

Katherine Xie, MSc¹, Kai Mon Lee, PhD¹, Todd Schachter, DO¹

¹Rowan-Virtua School of Osteopathic Medicine, 1 Medical Center Dr, Stratford, NJ 08084

Background

In the U.S., TB cases are largely due to reactivation of latent TB infections (LTBI) of immigrants from high-burden countries. The CDC and U.S. Preventive Services Task Force currently recommend screening newer immigrant populations, especially those born in highly-burdened areas with TB. This guideline mostly targets newly immigrated populations, defined as those …

Resensitization Of Clinical Isolates Of Mdr-Acinetobacter Baumannii To Antibiotics Using Bacteriophage Therapy, Zainab Mubasher, Valerie J. Carabetta

Rowan-Virtua Research Day

Acinetobacter baumannii is a Gram-negative, opportunistic pathogen notorious for causing severe infections in immunocompromised patients, particularly those with prolonged hospitalizations or invasive procedures1. Originally susceptible to many antibiotics in the 1970s, this bacterium has since evolved extensive resistance, making it one of the most challenging members of the ESKAPE group of multidrug-resistant (MDR) pathogens2. Its ability to survive in harsh environments and acquire resistance determinants has led to its classification as a “red alert” pathogen by health authorities worldwide. The increasing prevalence of MDR A. baumannii infections in healthcare settings underscores an urgent need for alternative treatment strategies as conventional …

Quantifying Qtc Prolongation Risk At Scale: Cardiac Safety Implications Of Moxifloxacin-Based Tb Regimens, Wesley Augustus Kim, Nikhila Arcakam, Brandon Velazquez

Rowan-Virtua Research Day

Tuberculosis treatment is undergoing its most significant transformation in decades. In recent years, updated ATS/CDC/ERS/IDSA guidelines introduced a new 4-month drug-susceptible TB regimen that incorporates moxifloxacin as a core component. These landmark guideline shifts mean that moxifloxacin exposure among TB patients globally is set to expand dramatically. This drug replaces the ethambutol component of standard TB regiment commonly associated with optic neuritis as a side effect. Yet there is a critical blind spot: while individual studies have documented moxifloxacin’s QT interval-prolonging effects, no research has modeled what happens when this drug is rolled out to millions of patients who simultaneously …

Case Report: Pott’S Puffy Tumor, A Rare Complication Of Sinusitis, Je Seong Lee, Esai A. Hernandez, James Espinosa, Alan Lucerna

Rowan-Virtua Research Day

We report the case of an 11-year-old female who presented with lethargy and new left upper extremity weakness after a recent Emergency Department visit for fever, rhinorrhea, and head fullness, and was subsequently diagnosed with Pott’s Puffy Tumor(PPT). Pott’s Puffy Tumor is a frontal bone osteomyelitis with an frontal  subperiosteal abscess and represents a rare but potentially life-threatening complication of sinusitis. Prompt imaging and timely clinical intervention are critical, though variable presentations can make diagnosis challenging. This case highlights the importance of early recognition, appropriate imaging, and prompt surgical and antibiotic management given the PPT’s  strong association with intracranial complications. …

Trends And Disparities In Mortality Involving Epilepsy And Aspiration Pneumonia Among Older Adults In The United States, 1999–2020, Pranaya Gade, Jarvish Shah, Daarsh Goradia, Nishant Patel, Jamir Pitton Rissardo Md, Ana Leticia Fornari Caprara Md

Rowan-Virtua Research Day

Introduction: Epilepsy in older adults is frequently complicated by swallowing dysfunction, increasing the risk of aspiration pneumonia. Despite its clinical relevance, national trends and demographic disparities in deaths involving these conditions remain poorly characterized. Methods: We analyzed death certificate data from the CDC WONDER Multiple Cause of Death database (1999–2020) for individuals aged ≥65 years with epilepsy (ICD-10 G40, G41) and aspiration pneumonia (J69) listed as causes. Age-adjusted mortality rates (AAMRs) per 100,000 and annual percentage changes (APCs) with 95% confidence intervals were calculated using Joinpoint Regression. Analyses were stratified by sex, race/ethnicity, census region, and state. Results: From 1999 …

A Stemi That Wasn’T: Staphylococcus Aureus Bacteremia Presenting With Troponin Elevation And Pericardial Involvement, Taqi A. Khan, Kelsey A. Murray, James Espinosa, Alan Lucerna

Rowan-Virtua Research Day

A 75-year-old female presented to the emergency department (ED) with vomiting, weakness, and altered mental status. Initial evaluation revealed a markedly elevated troponin level and an electrocardiogram (ECG) demonstrating diffuse ST-segment depressions with relative ST elevation in lead aVR, prompting activation of a STEMI alert. After cardiology consultation, emergent catheterization was deferred. Computed tomography (CT) imaging demonstrated an anterior mediastinal fluid collection extending toward the pericardial space with a loculated pericardial effusion. Splenic infarctions were also identified. Blood cultures later grew Staphylococcus aureus. The patient was treated with broad-spectrum antibiotics and transferred to a tertiary care center for further management. …

Gram-Negative Infective Endocarditis : A Rare Case Of Escherichia Coli Pulmonic Valve Endocarditis, Caroline Nguyen, Philip Willsie, James Espinosa, Alan Lucerna

Rowan-Virtua Research Day

Infective endocarditis (IE) is most commonly caused by gram-positive organisms, while Escherichia coli accounts for less than 1% of reported cases. Pulmonic valve involvement is particularly rare, representing fewer than 2% of IE cases. We report a case of E. coli infective endocarditis involving the pulmonic valve complicated by spinal epidural abscess and ascending cholangitis in a patient with intravenous drug use. Blood cultures demonstrated persistent E. coli bacteremia, and further evaluation with echocardiography and MRI revealed pulmonic valve vegetations and epidural abscess. This case highlights the importance of evaluating persistent gram-negative bacteremia for infective endocarditis and metastatic infection.

Septic Pulmonary Emboli Revealing Tricuspid Valve Endocarditis In A Patient Presenting With Opioid Withdrawal Symptoms, Dong Shin, Dhara Patel, James Espinosa, Alan Lucerna

Rowan-Virtua Research Day

Septic embolism is a serious complication of systemic infection, most commonly arising from infective endocarditis. In patients with intravenous drug use (IVDU), right-sided endocarditis may lead to septic pulmonary emboli, often presenting with nonspecific or misleading symptoms. A 36-year-old female with recent intravenous fentanyl use presented with presumed opioid withdrawal, along with chest pain, dyspnea, and systemic symptoms. Initial evaluation revealed leukocytosis and bilateral pulmonary nodules on imaging. Computed tomography angiography demonstrated multiple cavitary and non-cavitary nodules consistent with septic pulmonary emboli. Blood cultures grew Staphylococcus aureus, and echocardiography revealed tricuspid valve vegetations with severe regurgitation. The patient required escalation …

Case Report: Acute Encephalopathy Revealing Severe Babesiosis With Lyme Co-Infection, Czarina Gebrelle K. Soriano, James Espinosa, Alan Lucer

Rowan-Virtua Research Day

Acute confusion in older adults is a common emergency department presentation with a broad differential diagnosis. Tick-borne illnesses can cause significant systemic disease and may present with nonspecific neurologic or constitutional symptoms, making early recognition challenging. Babesiosis is a tick-borne parasitic infection transmitted by Ixodes ticks and may occur concurrently with other infections such as Lyme disease, further complicating diagnosis. We present a case of a 67-year-old male who presented with acute confusion and was found to have concurrent babesiosis and Lyme disease. This case highlights the importance of maintaining a high index of suspicion for tick-borne co-infections in patients …

When Venom Isn’T The Only Threat: Roseomonas Mucosa Bacteremia Following A Snake Bite, Cyrus Davati, Kishan Patel, James A. Espinosa Md, Alan Lucerna

Rowan-Virtua Research Day

Snake bites in the ED  overall are rare in the United States. While mortality is low due to modern interventions, the sequelae - including tissue necrosis, digit amputation, and subsequent infection  remain a significant concern.  Here we present the case of a  presumptively non-venomous snakebite, which  was associated with R. mucosa bacteremia.

A Pain In The Neck: Lemierre Syndrome Presenting With Retropharyngeal Abscess, Clara Keum, Leo Midure

Rowan-Virtua Research Day

Lemierre syndrome is a rare but potentially life-threatening condition characterized by septic thrombophlebitis of the internal jugular vein following an oropharyngeal infection. It is most commonly associated with Fusobacterium necrophorum,  and typically begins with pharyngitis or deep neck space infections, which can extend into adjacent vascular structures. Retropharyngeal abscesses are among the deep neck infections that may predispose patients to this complication due to their proximity to the internal jugular vein and surrounding fascial planes.

Although Lemierre syndrome classically occurs in otherwise healthy adolescents and young adults, it can also develop in immunocompromised individuals or patients with complex medical conditions. …

Bacteriophage Therapy Vs. Standard Antibiotics: A Review Of Treatment Efficacy For Recurrent Pediatric S. Pyogenes (Gas) Infections, Kartik Kannan Oms-I, Karina Malhotra Oms-I, Gabrielle Coccio Oms-I, Janhavi Belwalkar Oms-I, Jason Rienzo Oms-I, Samay Shukla Oms-I, Valerie J. Carabetta Phd

Rowan-Virtua Research Day

Background: Antibiotic resistance poses a growing threat to pediatric infectious disease management, particularly in the treatment of Streptococcus pyogenes (GAS) infections.¹ While β-lactam antibiotics remain the first-line standard of care, their utility is limited by allergy prevalence and rising resistance among alternative antibiotic agents, such as macrolides, lincosamides, and tetracycline.^2,3 Given these trends, bacteriophage therapy has emerged as a promising adjunctive treatment modality, offering targeted bacterial lysis while sparing commensal microbiota.⁴

Methods: A systematic literature search was conducted across PubMed and Embase (2000–2025) using terms related to antibiotic resistance, Streptococcus pyogenes, bacteriophage therapy, and pediatric populations. …

Bilateral Small Vessel Strokes In A Young Male With Coccidioidal Meningitis And Suspected Cns Vasculitis, Hugo Zamarron, Ahsan Ali

Research Colloquium

Background: Cerebral small vessel strokes in young, otherwise healthy adults without traditional vascular risk factors are rare and warrant further investigation. Central nervous system (CNS) vasculitis is an uncommon etiology that may be triggered by infections, including fungal pathogens. This case is notable for a suspected primary CNS vasculitis manifesting as bilateral deep infarcts in the setting of Coccidioidal meningitis. It highlights the importance of considering fungal infections and vasculitis in the differential diagnosis of stroke in younger patients.

Case Presentation: A 32-year-old previously healthy male presented with fever, headache, and was diagnosed with aseptic meningitis. He was later readmitted …

An Unusual Case Of Spontaneous Bacterial Peritonitis Due To Weissella Cibaria In A Patient With Decompensated Cirrhosis, Janetly Reinoso, Felipe Diaz Jr, Jose E. Campo Maldonado

Research Colloquium

Background: Spontaneous bacterial peritonitis (SBP) is a serious infection commonly encountered in patients with decompensated cirrhosis and ascites, usually involving gram-negative organisms. Weissella cibaria is a gram-positive, catalase-negative, facultative anaerobe not typically associated with intra-abdominal infections. This case report highlights an unusual instance of SBP caused by W. cibaria in a cirrhotic patient, emphasizing the clinical importance of identifying atypical organisms and discussing implications for antimicrobial stewardship in vulnerable populations.

Case Presentation: A 65-year-old woman with decompensated nonalcoholic steatohepatitis (NASH) cirrhosis status post-transjugular intrahepatic portosystemic shunt (TIPS) placement and recurrent ascites requiring weekly paracentesis presented with altered mental status following …

Exploring Anticoagulation Trends As Early Infection Markers In Pediatric Ecmo And Crrt Patients, Samantha Davidson, Jay Rilinger, Jenna Miller, Caroline Holton, Joshua Herigon, Brian Lee

Research Days

This retrospective cohort study at a tertiary pediatric hospital included ICU patients who developed infections after 72 hours on extracorporeal support from 2017-2023. We assessed whether the number of anticoagulation dose changes are linked to acquired infections.

Q Fever Pericardial And Pleural Effusions In A Pediatric Patient, Jonathan Ermer, Ben Kazdan, Cooper Bassham, Jacqueline Walker

Research Days

Background: Q fever is a bacterial infection caused by Coxiella burnetii. Q fever commonly presents with flu-like symptoms (fever, chills, fatigue, myalgias) in patients about 2-3 weeks after exposure to farm animals. Less commonly, Q fever can cause severe illness such as myocarditis, pericarditis, or meningitis. We present a rare case of a pediatric patient with pericardial and pleural effusions secondary to Q fever.

Case presentation: History of present illness: The patient is a 9-year-old female who presented as a referral from an outside hospital due to chest pain, shortness of breath, and 2 weeks of fever. The patient started …

Evaluation Of Human Mesenchymal Stromal Cells (Msc) As An Adjuvant Therapeutic For Chronic Lyme Disease, Matthew Teryek

Rowan-Virtua Research Day

Background: Lyme disease, caused by the spirochetal bacterium Borrelia burgdorferi, is the most prevalent vector-borne illness in the Northern Hemisphere. If undiagnosed or untreated, the disease progresses through multiple stages of increasing clinical severity. While antibiotics such as doxycycline and ceftriaxone are the current standard of care, patients with chronic or late-stage Lyme disease may require additional therapeutic interventions.

Rationale: Human mesenchymal stem cells (MSCs) are of growing clinical interest due to their immunomodulatory properties, low immunogenicity, and potential to promote tissue repair. These characteristics position MSCs as promising adjuvant therapies for chronic Lyme disease, with the potential to …

Impact Of Fluid Composition On Mortality And Kidney Injury In Sepsis: A Literature Review, Kush C. Patel, Simran Gandhi, Harmann Singh, Abdullah Noory, Akash M. Patel

Rowan-Virtua Research Day

Background

Fluid resuscitation is a cornerstone of early sepsis management. While normal saline (NS) has been widely used, emerging evidence suggests that balanced crystalloids such as lactated Ringer’s and Plasma-Lyte may offer improved renal outcomes and reduced mortality by avoiding hyperchloremic metabolic acidosis.

Hypothesis

In adult patients with sepsis, initial resuscitation with balanced crystalloids reduces mortality and the incidence of acute kidney injury (AKI) compared to normal saline.

Methods

A literature review was conducted using PubMed and MEDLINE databases focusing on randomized controlled trials and meta-analyses published from 2010–2024. Key studies included the SMART, SALT-ED, BaSICS, and PLUS trials. The …

A Ticking Time Bomb: An Overview Of A Case Report Of Neutropenic Fever Secondary To Tick-Borne Illness, Yasemin Galiboglu, Danielle Thor, Joann Ha, Kristine Wong, Cindy Hou

Rowan-Virtua Research Day

The advent of immunomodulatory therapies and their ever-expanding number of treatment indications necessitates the understanding of their associated complications. Neutropenic fever serves as an example of these complications often encountered in clinical practice. Although neutropenic fever can result from virtually any pathogen, episodes of the syndrome secondary to tick-borne illness remain relatively undocumented in the scientific literature. In the case presented, a 77-year-old female with a pertinent past medical history of smoldering IgG multiple myeloma on active immunosuppressive therapy presented with a first-time episode of neutropenic fever likely secondary to tick-borne illness. Through this overview of a broader report, attention …

Case Report: A Case Of Tracheal Perforation, Cyrus Davati, Eric Maddock

Rowan-Virtua Research Day

Here we present the case of a 93-year-old female with a past medical history of arthritis and dementia who came to the hospital for a change in mental status and decreased responsiveness at home. The patient was intubated at home by EMS secondary to continued respiratory distress. The patient had a history of a productive cough over the past three days. The patient arrived at the emergency department with continued respiratory failure. During the ED evaluation, the patient was noted to have tracheal rupture. The patient was admitted to the ICU for severe sepsis and continued on broad spectrum IV …

An Unusual Cause Of Sepsis: Capnocytophaga Canimorsus, Capnocytophaga, Christopher Dellmyer, Kishan B. Patel

Rowan-Virtua Research Day

Septic shock can be caused by numerous different pathogens. A few of the more common causes are Streptococcus Pneumoniae, Staphylococcus Aureus, Escherichia Coli, Pseudomonas Aeruginosa, and Candida Albicans. Although these are the pathogens involved in the majority of septic shock cases, it is imperative to take the entire clinical picture into account when treating a patient with septic shock. Here we will discuss a seemingly unimpressive dog bite leading to Capnocytophaga canimorsus bacteremia, septic shock and end organ failure.

Case Report: Haemophilus Influenzae Meningitis In A 65 Year Old Female, Kaywan Saed, Russell Mordecai

Rowan-Virtua Research Day

We report a case of a 65-year-old female who presented with fever, altered mental status, and neck stiffness. Cerebrospinal fluid (CSF) analysis confirmed Haemophilus influenzae meningitis. The differential diagnosis of bacterial meningitis in older adults is broad and includes Streptococcus pneumoniae, Neisseria meningitidis, Listeria monocytogenes, and Haemophilus influenzae. However, in the post-Hib vaccine era, non-typeable H. influenzae has emerged as a significant cause of invasive disease in older adults, particularly in those with underlying comorbidities.

Older patients often present with atypical symptoms, which may delay diagnosis and treatment. In this case, early recognition and prompt administration of empiric antibiotic therapy …

The Impact Of Emergency Room Overcrowding On The Incidence Of Healthcare-Acquired Infections Among Patients, Hayya Ali

Rowan-Virtua Research Day

Emergency department (ED) visits are vital components of healthcare delivery, serving as the primary site for acute medical care, particularly for individuals with urgent medical needs. The ED is among the most crowded hospital units. The fast-paced setting and over-crowdedness of an emergency room have become the reality of every hospital across the United States. Overcrowding causes problems for patients and staff, which include the risk of contracting healthcare-acquired infections. This is due to several factors that in most cases lead to an increase in the number of people within the ED, an increase in mortality and morbidity, and a …

Assessing The Efficacy Of Prolonged Doxycycline Pep Use In High-Risk Populations For Sti Prevention, Lam Doan, Pearl Joslyn, Lizann Sung, Timothy Breiner, Sarah Marotta, Shikhar Rastogi

Rowan-Virtua Research Day

First recommended in October 2022, doxycycline post-exposure prophylaxis (DoxyPEP) has been increasingly used as a treatment for multiple sexually transmitted infections (STIs). To evaluate the efficacy of prolonged DoxyPEP use in high risk populations - men who have sex with men (MSM) and transgender women - for STIs, different sources addressing various aspects of DoxyPEP, its efficacy in STI prevention, and the potential consequences of its widespread use in terms of antimicrobial resistance were examined. Across 9 studies, DoxyPEP was found to decrease the incidence of bacterial STIs, specifically, syphilis, chlamydia, and gonorrhea with varying efficacy, especially for gonorrhea. Furthermore, …

Case Report: When Confusion Signals A Crisis: Rethinking The Diagnosis Of Meningitis In Geriatric Sepsis, Asma Zahid

Rowan-Virtua Research Day

We report the case of an 88-year-old female who presented with altered mental status, initially suspected to have urosepsis but ultimately diagnosed with streptococcal meningitis. The patient had a history of lethargy and anorexia over the past few days and was found to have sepsis. Despite initial focus on urosepsis, blood cultures revealed Streptococcus, and cerebrospinal fluid analysis confirmed bacterial meningitis. This case highlights the potential for meningitis to be overlooked in elderly patients with suspected sepsis, underscoring the importance of broad diagnostic considerations and early intervention. This case highlights the importance of considering meningitis in elderly patients presenting with …

Case Report: Dissecting Retroperitoneal Abscess With Gas Formation, David F. Koziel Jr.

Rowan-Virtua Research Day

Presenting as a case to the emergency department was a 53-year-old male with a complaint of diffuse abdominal pain and focal right flank pain at site of recent percutaneous abscess drain site performed exactly one month prior. This followed hospitalization in the preceding year for complicated multifocal intra-abdominal infections requiring surgical interventions including exploratory laparotomy and surgical debridement for intra-abdominal abscess and scrotal abscess formation. Despite prior aggressive management and extensive coverage with broad-spectrum antibiotics, this patient was found to have fulminant recurrance of infection in the right retroperitoneal space with an expanding abscess dissecting through the retroperitoneal structures into …