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Home » Careers: Healthcare Jobs and Employment Opportunities » Residency and Training Programs » UCI/CHOC Pediatric Infectious Diseases Fellowship Program

UCI/CHOC Pediatric Infectious Diseases Fellowship Program

Contact Us

Karen Olson
Program Coordinator
[email protected]
Phone: 714-509-8403

Program Leadership

Delma Nieves, MD
Division Chief,
Program Director

Matthew Zahn, MD
Associate Program Director

Welcome, and thank you for your interest in the University of California, Irvine-CHOC Hospital (UCI-CHOC) Pediatric Infectious Diseases Fellowship Program!

We’re proud to train the next generation of pediatric infectious diseases leaders in a collaborative and supportive environment.

Please click below to learn more about our fellowship, our team, and training at UCI-CHOC.

Message From the Director
Program Overview
Our Hospitals
Cirriculum
How to Apply
Benefits
Graduates
Clinical Faculty

Message From the Director

I am immensely proud and excited to announce that UCI/CHOC now offers specialty training in Pediatric Infectious Diseases. Our institutions have long shared a rich history of educating the next generation of pediatricians and fostering the development of elite subspecialists.

As an alumna of the CHOC pediatric residency program myself, I have experienced firsthand the unique clinical environment and community that define this hospital. While our facilities have grown significantly, our core mission remains unchanged: a steadfast dedication to providing exceptional care and advocating for our patients and their families.

By combining CHOC’s diverse clinical volume with the robust research infrastructure of the University of California, Irvine, our fellowship offers an unparalleled training opportunity in Southern California. We invite you to join a program that is as compassionate as it is clinically rigorous.

Delma J Nieves, MD

Program Overview

The UCI/CHOC Pediatric Infectious Diseases Fellowship is meticulously designed to ensure trainees meet all requirements for the American Board of Pediatrics certifying examination. Beyond board eligibility, our primary objective is to prepare fellows for distinguished and successful careers—whether in clinical practice, public health, or high-impact academic research.

Vision, Mission and Aims

  • Vision: To provide the highest standard of care for children with complex infectious diseases while advancing the field through continuous innovation and research.
  • Mission: To cultivate Pediatric Infectious Diseases physicians who excel in clinical practice and emerge as leaders in academic research and medical education.
  • Aims: To provide comprehensive clinical and educational experiences, including foundational laboratory training, infection prevention, and antimicrobial stewardship.

Our Hospitals

Children’s Hospital of Orange County, Orange

CHOC is ranked among the Best Children’s Hospitals in the U.S. by U.S. News & World Report. It serves Orange County and the surrounding regions, with a catchment area of more than 5 million people, and thus provides a very rich learning environment with a diverse patient population. CHOC is an academic, community-based hospital that serves as the main site for training in the fellowship. It has 386 beds, including a 54-bed PICU, 24-bed cardiac ICU, 104-bed NICU, and separate oncology and neuroscience units. CHOC’s ED is a Level I pediatric trauma center.

University of California, Irvine School of Medicine and the UCI Medical Center

UCI School of Medicine is ranked among the top 50 medical schools in the nation for research by U.S. News & World Report. UCI School of Medicine has 24 departments, ranging from basic science research to clinical, medical and surgical specialties, and research, clinical, and teaching. UCI School of Medicine is the sponsoring institution and serves as a primary site for basic science and translational bench research opportunities. The UCI Medical Center in Orange serves as the main clinical site for the UC Irvine School of Medicine, integrating teaching, research, and patient care.

Curriculum

Clinical Experience

Our fellowship offers comprehensive clinical training through a diverse network of sites, including CHOC Hospital, UCI Medical Center and the Orange County Health Care Agency. This multi-institutional approach ensures that fellows provide infectious disease consultation to a broad patient population, ranging from medically complex cases to underserved communities with diverse social and economic backgrounds.

  • Inpatient & Outpatient Rotations: Fellows rotate primarily at CHOC through high-volume services that provide a foundation in both acute inpatient consultation and longitudinal outpatient care gaining a nuanced understanding of how infectious diseases impact children across the entire community.
  • Cross-Disciplinary Training: To bridge the gap between pediatric and adult medicine, first-year fellows complete a four-week adult infectious disease rotation at UCI Medical Center. This invaluable experience highlights the intricacies, differences, and overlaps in disease pathology and management across the lifespan, preparing fellows for the transition of care in adolescent populations.
  • Call Responsibilities: Clinical autonomy is developed through a structured call schedule. Fellows are scheduled for eight weeks of call per year (including weekends) throughout the three-year program, providing ample opportunity to manage acute consultations and emerge as leaders in clinical decision-making.

Inpatient Clinical Rotations

Fellows serve as primary consultants across a variety of high-acuity services at CHOC, managing a wide spectrum of infectious complications in:

  • Critical Care & Neonatology: Managing infections in the PICU and NICU.
  • Hematology & Oncology: Addressing opportunistic infections in immunocompromised hosts and bone marrow transplant recipients.
  • General Pediatrics & Surgery: Consulting on community-acquired infections, post-operative complications, and musculoskeletal infections.

Adult Infectious Disease (UCI Medical Center): A dedicated one-month rotation during the first year to understand the transition of care and the biological differences in adult host responses.

Outpatient & Specialized Longitudinal Care

To ensure proficiency in long-term management and preventative medicine, fellows rotate through several specialized clinics:

  • Pediatric Infectious Diseases Clinic: General ID referrals and post-discharge follow-up.
  • Primary Immunodeficiency Clinic: A unique multidisciplinary environment collaborating with Hematology and Immunology faculty.
  • HIV/KIDS Clinics: Comprehensive care for pediatric and adolescent patients living with HIV.

Public Health & Epidemiology

A highlight of the program is a two-week rotation at the Orange County Health Care Agency. This experience bridges the gap between clinical medicine and public health, offering hands-on training in:

  • Disease Surveillance: Tracking tuberculosis (TB), sexually transmitted diseases (STDs), and other reportable conditions.
  • Public Health Diagnostics: Exposure to specialized laboratory techniques and diagnostic tests unique to state and local health departments.
  • Outbreak Management: Learning the fundamentals of outbreak investigation, contact tracing, and community mitigation strategies.

Research & Scholarly Activity

Research is a cornerstone of our fellowship. We provide a structured environment that empowers fellows to design and conduct high-impact scholarly projects under the guidance of world-class faculty mentors.

Protected Research Time

To ensure academic success, fellows receive 20 months of protected research time over the course of the three-year program.

  • Year 1: Foundation building and project selection.
  • Years 2 & 3: Intensive focus on data collection, analysis, and manuscript preparation.

Mentorship & Facilities

Fellows have the flexibility to pursue either basic science or clinical research, tailored to their specific career interests. Our partnership with UC Irvine (UCI) provides access to top-tier laboratory facilities and a community of researchers known for excellence in infectious disease science. Mentorship is available across both the CHOC and UCI campuses, offering a rich multidisciplinary pool of expertise.

Core Research Curriculum

Beyond the bench and the bedside, our comprehensive core curriculum equips fellows with the formal tools necessary for a career in academic medicine:

  • Methodology: Training in biostatistics, study design, and clinical research methods.
  • Regulatory Skills: Deep dives into Research Ethics and Institutional Review Board (IRB) processes.
  • Professional Development: Grant preparation, scientific writing, and evidence-based medicine.
  • Systems Improvement: Practical training in Quality Improvement (QI) and patient safety.

Conferences & Academic Leadership

Education at our fellowship extends far beyond the bedside. Fellows engage in a robust schedule of didactic sessions and multidisciplinary conferences, while also serving as key educators for the next generation of physicians.

Teaching & Leadership

Fellows are integral members of the academic community at CHOC and UCI. You will have frequent opportunities to refine your teaching skills through:

  • Morning Reports & Noon Conferences: Leading case-based discussions for pediatric residents.
  • Grand Rounds: Presenting cutting-edge infectious disease topics to the broader medical community.
  • Clinical Mentorship: Teaching medical students and residents during inpatient consultation services.
  • M&M Conferences: Participating in multidisciplinary Morbidity & Mortality reviews alongside the NICU, PICU, and Hospitalist teams.

Conference Schedule

Our structured curriculum ensures comprehensive coverage of the ABP Subspecialty Board content while fostering real-time clinical problem-solving.

WeeklyID Case Discussions: In-depth review of active, complex clinical cases.
Twice MonthlyID Fellows Core Teaching: Focused sessions on pediatric ID board topics.
Microbiology/Pathology Rounds: Dedicated time in lab to review cultures and slides.
MonthlyJournal Club: Critical appraisal of the latest peds ID literature.
All Fellows Core Curriculum: Career development and research methodology.
Infection Prevention: Education and participation in hospital-wide infection prevention.
QuarterlyAntibiotic Stewardship: Strategic meetings focused on antimicrobial optimization and policy.

The Pediatric Infectious Disease fellowship program offers a robust set of opportunities to further enhance your experience with core clinical training, and more focused offering to create specialized tracks if so desired by the fellow.

Infection Prevention/Antimicrobial Stewardship Opportunities

  • Infection Prevention Weekly Rounds and Teaching
  • Participation as a member of the Infection Prevention Committee
  • Rounding with the Antimicrobial Stewardship Program (AS) team
  • Access to Vigilanz Surveillance system (ASP)
  • Participation as a member of the ASP committee
  • Opportunities to structure your own IP or ASP project

Training opportunities

  • SHEA/CDC Training Certificate Course in Healthcare Epidemiology
  • SHEA/CDC Antibiotic Stewardship Training Course
  • IDweek ASP course

Clinical Lab and Research

  • Clinical and basic bench research opportunities are available at CHOC as well as UCI Statistics support through CHOC and UCI
  • Ability to apply for CHOC research grants to fund research projects
  • Participation in ID division-initiated research projects with the opportunity to present research findings at international conferences

Global Health/Public Health

  • Affiliation with Cayetano Heredia University in Lima, Peru with opportunities for international rotations, collaboration, research.
  • Affiliation with the Orange County Health Care agency with an opportunity to rotate in their community health clinics (STD/TB)

Online Resources

  • GORGAS Cases 
  • California Health Alert Network (CAHAN) 
  • Program for Monitoring Emerging Diseases (ProMED)
  • Emerging Infections Network (EIN) 

Medical Education

  • One on one teaching of medical students and residents on service
  • Scheduled fellow run noon conference and morning reports
  • Fellow run case conferences
  • Fellow run journal club
  • More opportunities available through UCI partnership if interested
  • City-Wide ID Case Conference

How To Apply

Applications are accepted through the Electronic Resident Application System (ERAS). Our fellowship program participates in the National Residency Match Program (NRMP).

Important Dates: Application submission period July to November

Apply on ERAS

Benefits

For the most up-to-date information on UCI benefits and resources, see the links below:

  • GME Residents & Fellows Salary, Benefits, Policies | UC Irvine School of Medicine
  • GME Information & Resources | UC Irvine School of Medicine
  • GME Residents & Fellows Resources | UC Irvine School of Medicine
  • Wellness Resource Guide | UC Irvine School of Medicine

Graduates

Alvaro Galvis, MD, PhD
Class of 2022
Chief, Pediatric Infectious Diseases Loma Linda University Health
Publications:

  • Galvis AE, Arrieta A. Congenital Syphilis: A U.S. Perspective. Children (Basel). 2020 Oct 29;7(11):203. doi: 10.3390/children7110203. PMID: 33137962; PMCID: PMC7692780
  • Arrieta A, Galvis AE, Osborne S, Morphew T, Imfeld K, Enriquez C, Hoang J, Swearingen M, Nieves DJ, Ashouri N, Singh J, Nugent D. Use of COVID-19 Convalescent Plasma for Treatment of Symptomatic SARS-CoV-2 Infection at a Children’s Hospital: A Contribution to a Still Inadequate Body of Evidence. Children (Basel). 2023 Feb 10;10(2):350. doi: 10.3390/children10020350. PMID: 36832478; PMCID: PMC9955755.
  • Arrieta A, Galvis AE, Morphew T, Ehwerhemuepha L, Osborne S, Enriquez C, Imfeld K, Hoang J, Nieves D, Ashouri N, Singh J, Nugent D. Safety and Antibody Kinetics of COVID-19 Convalescent Plasma for the Treatment of Moderate to Severe Cases of SARS-CoV-2 Infection in Pediatric Patients. Pediatr Infect Dis J. 2021 Jul 1;40(7):606-611. doi: 10.1097/INF.0000000000003166. PMID: 33967228.
  • John R, Galvis AE, Bucayu RFT, Schomberg J, Guner Y, Arrieta A, Nieves D. Exploring oral antibiotics for antibiotic stewardship in nonoperative management of complicated appendicitis in pediatric patients. Antimicrob Steward Healthc Epidemiol. 2025 Apr 25;5(1):e101. doi: 10.1017/ash.2025.74. PMID: 40290181; PMCID: PMC12022924.
  • John R, Galvis AE, Bucayu RFT, Schomberg J, Guner Y, Arrieta A, Nieves D. Exploring oral antibiotics for antibiotic stewardship in nonoperative management of complicated appendicitis in pediatric patients. Antimicrob Steward Healthc Epidemiol. 2025 Apr 25;5(1):e101. doi: 10.1017/ash.2025.74. PMID: 40290181; PMCID: PMC12022924.

Adam Lee, MD
Class of 2025
Pediatric Infectious Diseases Faculty Rady Children’s Health and University of California, Irvine
Publications:

  • Arrieta AC, Lee A, Tran MT. Invasive Mold Infections in Children: Navigating Troubled Waters with a Broken Compass. Infect Dis Ther. 2023 Jun;12(6):1465-1485. doi: 10.1007/s40121-023-00819-9. Epub 2023 May 20. PMID: 37209297; PMCID: PMC10281928.
  • Lee A, Tran MT, Singh J, Arrieta A. Optimizing Voriconazole Dosing in Extremely Premature Infants With Aspergillus Infections. Pediatr Infect Dis J. 2025 Oct 1;44(10):955-961. doi: 10.1097/INF.0000000000004868. Epub 2025 May 28. PMID: 40440717.

Clinical Faculty

Delma J. Nieves, MD
Fellowship Program Director, Associate Clinical Professor of Pediatrics, UC Irvine School of Medicine
Division Chief, CHOC
Pediatric Infectious Diseases Medical Director, UCI

Matthew M. Zahn, MD
Assistant Program Director, Associate Clinical Professor of Pediatrics, UC Irvine School of Medicine

Antonio C. Arrieta, MD
Professor of Pediatrics, UC Irvine School of Medicine
Director of Infectious Diseases Research, CHOC

Negar Ashouri,MD
Assistant Clinical Professor of Pediatrics, UC Irvine School of Medicine
Antimicrobial Stewardship

Coleen Cunningham, MD
Pediatrician in Chief, CHOC/UC Irvine School of Medicine
Professor of Pediatrics, UC Irvine School of Medicine

Adam Lee, MD
Attending Physician, Pediatric Infectious Disease

Aaron Shaw, MD
Attending Physician, Pediatric Infectious Disease
Assistant Clinical Professor of Pediatrics, UC Irvine School of Medicine

Jasjit Singh, MD
Professor of Pediatrics, UC Irvine School of Medicine
Medical Director, Infection Prevention and Control, CHOC

Jennifer Strickland, PA
Physician Assistant, CHOC

Erlinda Ulloa, MD
Erlinda R Ulloa | UC Irvine School of Medicine
Assistant Professor of Pediatrics, UC Irvine School of Medicine

Rady Children's Hospital - Orange County

Rady Children's Health: formerly Children's Hospital of Orange County

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