Bacterial Infections and Mycoses Commons^™

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 …

First Report Of A Multidrug-Resistant Staphylococcus Coagulans Urinary Tract Infection Associated With A Medical Device., Carlos Ramírez-Pfeiffer, Defne Esmeralda Esparza-Galván, Allan Guzmán Cardenas, Jania Jazmin Gutiérrez-Carreño, Martín Segura-Chico, Juan Carlos López-Alvarenga

Research Symposium

Background: The identification of Staphylococcus schleiferi subsp. coagulans (recently reclassified as S. coagulans) was part of a previous retrospective study on antibiotic resistance in urinary tract infections (UTIs) in older adults conducted at a Tamaulipas state hospital in 2023 (Esparza 2023, unpublished data). S. coagulans is an emerging human pathogen, initially associated with veterinary infections, particularly dermatitis and otitis in dogs. Like other Staphylococcus species, it is known for its biofilm-forming ability, which enhances its persistence and resistance to treatment. Recent studies have linked S. coagulans to severe human infections, including endocarditis, meningitis, and hepatocellular carcinoma, particularly in patients with …

Houston, We Have A Problem: Diagnostic Difficulties In The Aids Patient With Tuberculosis Infection, Hector D. Preciado, Maria E. Torres, Muhammad A. Siddiqui, Liza Salloum, Lee Gelpi, Jose E. Campo Maldonado

Research Colloquium

Background: Tuberculosis (TB) is the leading cause of infectious death worldwide with 1.5 million deaths annually and nearly 1/4th of the world’s population (1.7 billion) infected with latent tuberculosis infection (LTBI) in 2014. Its diagnosis conventionally relies on tuberculin skin testing (TST), and Interferon-Gamma Release Assay (IGRA) which relies on the production of Interferon Gamma (IFN-y) in response to Mycobacterium tuberculosis (MTB) specific antigens. IGRA is a useful tool for detecting latent TB disease, and can be used as an adjunct for the diagnosis of active TB cases. Increases in IFN-y levels might support the diagnosis of a new TB …

Prognostic Utility Of The Lactate/Pyruvate Ratio For Mortality In Patients With Sepsis: An Observational Study, Edgar G. Dorsey-Trevino, Olga G. Cantu-Rodriguez, Jose A. Hawing-Zarate, Grecia A. Gonzalez-Cantu, David Gomez-Almaguer, Cesar H. Gutierrez-Aguirre

Research Colloquium

Introduction: Measurement of serum lactate remains pivotal in sepsis evaluation as it is closely related to tissue hypoxia and mortality.^{1, 2} Serum lactate, however, can be elevated due to a myriad of reasons beyond hypoperfusion.³ A proposed alternative to control for serum lactate’s inherent variability is to measure pyruvate concomitantly to calculate the lactate/pyruvate (L/P) ratio.^{4, 5} As pyruvate transforms into lactate in anaerobic conditions, its value decreases in serum, increasing the L/P ratio, hence indicating an actual tissue-perfusion mismatch.⁶ Despite its clinical utility, there is a paucity of evidence evaluating the role of the L/P …

Rare Case Of Prosthetic Joint Infection Caused By Salmonella Enterica - A Case Report, Carlos Ramos, Shyama Appareddy, Peter J. Gonzalez

Research Colloquium

Introduction: Collectively, over 1 million total knee arthroplasties (TKA) and total hip arthroplasties (THA) are performed in the United States each year. In 2010 it was estimated that 1.58% of the United States general population has received a TKA. Prosthetic joint infections (PJI) are the most common indication for a TKA revision1 . In total, S. aureus is responsible for about 50% of all prosthetic joint infections, and about 15% are caused by gram negative pathogens2 .

Objective: This is a case report which describes the presentation and clinical course of a 59-yearold female with Salmonella enterica septic arthritis of …

Catheter-Associated Urinary Tract Infections: Patient Characteristics, Treatment, And Clinical Outcomes In One South Texas Acute Care Hospital, Kimberly A. Ambrosini, Jose Campo Maldonado

Research Colloquium

Background: Catheter-associated urinary tract infections (CA-UTIs) account for 40 percent of nosocomial infections worldwide. Their elimination is at the forefront of quality improvement in one South Texas acute care hospital.

Methods: Over a period of 6 months, five CA-UTIs occurred in one South Texas acute care hospital. These cases were identified via regular surveillance by Infection Prevention staff and the Laboratory Department of the hospital. This research reviews patient age, sex, length of stay, bacteria contracted, appropriate antibiotic use, patient characteristics, and overall outcomes.

Results: Between the months of July and December 2021, 5 CAUTIs were contracted. Patients ranged in …

Tuberculosis In Elderly Hispanics: Bcg Vaccination At Birth Is Protective Whereas Diabetes Is Not A Risk Factor, Julia M. Scordo, Genesis P. Aguillón-Durán, Doris Ayala, Ana P. Quirino-Cerrillo, Eminé Rodriguez-Reyna, Francisco Mora-Guzmán, Jose A. Caso, Eder Ledezma-Campos, Larry Schlesinger, Jordi B. Torrelles, Joanne Turner, Blanca I. Restrepo

Research Symposium

Background. Aging increases the risk of tuberculosis (TB) and its adverse outcomes, but most studies are based on secondary analyses, and few are in Hispanics. Diabetes is a risk factor for TB in adults, but its contribution in the elderly is unknown. We aimed to identify the role of diabetes and other risk factors for TB in elderly Hispanics.

Methods. Cross-sectional study among newly-diagnosed TB patients, recent contacts (ReC), or community controls (CoC) totaling 646 participants, including 183 elderly (>60 years; 43 TB, 80 ReC, 60 CoC) and 463 adults (18 to 50 years; 80 TB, 301 …

Covid-19 And Chronic Diabetes: The Perfect Storm For Reactivation Tb?, Genesis P. Aguillón-Durán, Ericka Prieto-Martinez, Doris Ayala, Juan Garcia Jr, John M. Thomas, Juan I. Garcia, Jordi B. Torrelles, Eder Ledezma-Campos, Blanca I. Restrepo

Research Symposium

Background: The Coronavirus disease 2019 (COVID-19) pandemic is predicted to have a net negative effect on tuberculosis (TB) control, with an estimated excess of 6.3 million tuberculosis cases and 1.4 million deaths by 2025. Programmatic issues like the lockdown of TB services affect all patients, while biosocial factors have a differential impact on an individual’s risk for TB or adverse TB outcomes.

Case presentation: We report three cases of incident TB after resolution of COVID-19 episodes.Coincidently, all cases shared a common risk factor: a chronic history poorly-controlled diabetes.

Conclusions: Our findings alert to the threat posed by …

A Case Report Of A Primary Cerebral Abscess Due To Nocardia Asteroides In An Immunocompetent Patient, Ileana Elita Mendez, Nicole Marie Barreto, Alan Lanurias, Luis Alberto Rosas

Research Symposium

Background: Brain abscesses caused by Nocardia are rarely reported and have high mortality. It usually affects patients who are immunocompromised and initiates as a lung infection that disseminates hematogenously, though it can also affect those immunocompetent. Cerebral nocardiosis imitates brain tumors, which can delay the initiation of the appropriate antibiotic therapy.

Case Description: We present a case of a 64-year-old immunocompetent male with multiple cerebral abscesses who presented with headaches, left-sided weakness, and ataxia. Upon imaging, multiple brain lesions were revealed. The patient underwent craniotomy and drainage of the mass. He was initially empirically treated, though cultures later grew Nocardia …

Catheter-Associated Urinary Tract Infections: Patient Characteristics, Treatment, And Clinical Outcomes In One South Texas Acute Care Hospital, Kimberly A. Ambrosini, Jose Campo Maldonado

MEDI 9331 Scholarly Activities Clinical Years

Background: Catheter-associated urinary tract infections (CA-UTIs) account for 40 percent of nosocomial infections worldwide. Their elimination is at the forefront of quality improvement in one South Texas acute care hospital.

Methods: Over a period of 6 months, five CA-UTIs occurred in one South Texas acute care hospital. These cases were identified via regular surveillance by Infection Prevention staff and the Laboratory Department of the hospital. This research reviews patient age, sex, length of stay, bacteria contracted, appropriate antibiotic use, patient characteristics, and overall outcomes.

Results: Between the months of July and December 2021, 5 CAUTIs were contracted. Patients …

Understanding The Patterns Of Distribution And Abundance Of Lyme Disease Carrying Ticks And Their Hosts, Julio Ruiz

Honors Theses

Lyme disease is caused by the bacteria Borrelia burgodorferi and spreads to their hosts by the bites of infected Ixodes scapularis ticks. In the United States, Lyme disease is typically found in the northeast but in recent years the disease has begun to be found further south and west than previously before. Yet, today, little information can be found about the patters of distribution and abundance of ticks and their host. The main goal of this research work was to expand the knowledge of the abundance and distribution of ticks and host. Based on tick collection data obtained from Maikis …