Our Staff

  • Lydia Aoun-Barakat

    Associate Professor Term; Medical Director Nathan Smith Clinic; Program Director, HIV Primary Care Training Track

    Research Interests
    HIV Infections; Patient Outcome Assessment
    Clinical Interests
    Adult; HIV Infections; Infectious Disease Medicine

    Dr. Lydia Aoun Barakat is a Past President of the Connecticut Infectious Disease Society.

    As the Medical Director of the Nathan Smith Clinic at Yale New Haven Hospital, she oversees the HIV care of over 900 patients living with HIV/AIDS. Dr. Barakat’s career is highlighted by her commitment for managing HIV disease. She has received and contributed in multiple HRSA and CDC grants that are dedicated to the mission of serving the people living with HIV/AIDS and require a long term vision in accomplishing a high standard quality of care as well as a focus on outcome measures.

    Dr. Barakat is a leader in Quality Improvement in HIV care and serves as member in several local and national committees dedicated to improving HIV Quality. Her work has been recognized nationally by the presentation of the “Senior Leadership Award” for her role in building an HIV Quality infrastructure for patient care.

    She is passionate about teaching residents and students, mentoring them for presentations in national meetings and completing clinical research projects. Dr. Barakat has been honored to receive “Teacher of the year award” on four occasions during the last decade. She also serves as the Program Director for the HIV Training Track in the Yale Internal Medicine Primary Care Residency Program that she established and implemented since 2011.

    Dr. Barakat is also an investigator in the Yale AIDS clinical trials and has ongoing research projects on HIV and aging.

    Dr. Barakat has taken every opportunity to expand her knowledge and expertise in the fields of Medicine and Infectious Diseases. She enjoys the investigative process the results in the diagnosis in challenging infectious disease cases; whether diagnosing a “Fatal Inhalation Anthrax in a 94-year-old Connecticut Woman” published in JAMA, or the patient who almost lost his vision due to Cat Scratch Disease as reported in “Diagnosis: Vision Quest” in the New York Times magazine.

    Dr. Barakat is dedicated to her role as clinician educator at Yale where caring for patients and mentoring students and residents are paramount.

  • Dana Dunne

    Associate Professor of Medicine (Infectious Diseases); Director, Internal Medicine Clerkship; Associate Chair for Education and Academic Affairs

    Research Interests
    Chlamydia Infections; Gonorrhea; Sexually Transmitted Diseases; Syphilis; Global Health; Sexually Transmitted Diseases, Bacterial; Vaginosis, Bacterial; Infectious Disease Medicine

    Dr. Dunne has spent the majority of her career focusing on the care of patients with sexually transmitted diseases and on the education of clinicians who also care for these patients. She is a founding and core faculty member for the Yale Primary Care HIV Training Track.

    Dr Dunne also enjoys medical education and faculty development. She has been the Inpatient Internal Medicine Clerkship Director since 2011 and and spends a good portion of her time on educator development projects for GME and UME. 

  • Michael Green

    Professor of Medicine (General Medicine)

    Research Interests
    Clinical Competence; Curriculum; Education, Graduate; Internal Medicine; Learning; Evidence-Based Practice

    Dr. Green received his medical degree from the University of North Carolina School of Medicine and Master of Science in Health Policy and Management from Harvard School of Public Health. His post graduate training included an internship, residency, and fellowship in general medicine at the Beth Israel Hospital in Boston and the Harvard Medical School.

    Dr Green serves on the SGIM evidence-based medicine task force, the SGIM reforming internal medicine residency training task force, and the editorial board of the Journal of General Internal Medicine. He has received the regional and national awards for scholarship in medical education from the Society of General Internal Medicine and was recently chosen as the second Kimball Scholar at the American Board of Internal Medicine.

    Dr. Green practices general internal medicine and sees patients referred for HIV-related dyslipidemia and lipodystrophy.

  • Onyema Ogbuagu

    Associate Professor of Medicine (AIDS)

    Research Interests
    Hepatitis C; HIV Infections; Disk Diffusion Antimicrobial Tests; Health Care

    I am an Associate Professor of Medicine, in the clinician-educator track and Director of Yale AIDS program Clinical Trials program of the Section of Infectious Diseases of the Yale School of Medicine. My clinical responsibilities include educating and training medical students, residents and infectious diseases fellows in various capacities in inpatient and outpatient settings; and through structured course work and other teaching sessions. As a faculty of the HIV training track of the Yale-Internal Medicine primary care program and for the past 6 years as a faculty of the Human Resources for Health program in Rwanda, I have contributed significantly to and have extensive experience with curriculum development, structuring of residency training programs, and mentoring residents and faculty. In Rwanda specifically, I have and continue to mentor medical residents and junior faculty in quality improvement and clinical research projects that are locally relevant and addressing important infectious diseases-related problems (particularly HIV/AIDS and antimicrobial resistance). Furthermore, I have facilitated meaningful educational and research collaborations between faculty and trainees across institutions. As the program director of World Bank and HRSA-funded efforts supporting the Liberia College of Physicians and surgeons (LCPS)–run Internal medicine residency training program, I have overseen the selection and deployment of faculty to Liberia, and am responsible for educational programs and activities aimed at strengthening the residency training program. Overall, my expertise and collective experiences to date have positioned me to design and run successful projects around capacity building in low-resource settings including developing and implementing innovative and robust medical training and research programs for faculty, fellows, residents and students.

    As a member and now Director of the Yale AIDS Program HIV clinical trials program, I have been a principal and or co-investigator on numerous pharmacokinetic, phase 2 and 3 safety and efficacy trials of novel antiviral compounds (HIV). Most recently, given the alarming rate of new infections among men who have sex with men (MSM), I have added HIV prevention trials to my portfolio including being a co-principal investigator on a Yale CIRA funded project, which has supported the formation of a cohort of men who have sex with men, who are at high risk for HIV and are engaged in HIV PrEP services in order to study the impact of substance use on retention in care and adherence to PrEP.

  • Jeanette Tetrault

    Associate Professor of Medicine (General Medicine); Program Director, Addiction Medicine Fellowship, Internal Medicine

    Dr. Tetrault’s scholarly work focuses on care of patients with addicition and the medical co-morbidities associated with substance use, mainly HIV and Hepatitis C. She is a diplomate of the American Board of Addiction Medicine. Dr. Tetrault is a physician providing primary care, addiction treatment and buprenorphine/naloxone treatment at the Central Medical Unit of the APT Foundation, a multi-specialty addiction treatment facility, and is an attending physician at Yale New Haven Hospital (YNHH). She is the co-director of the Addiction Recovery Clinic in the Adult Primary Care Clinic at the St. Raphael's Campus of YNHH, which serves both a clinical care and a teaching mission. She has been recognized for her teaching accomplishments being awarded the New England Regional Society of General Internal Medicine (SGIM) Clinician Educator of the Year Award in 2013. She is the Program Director for the Yale Addiction Medicine Fellowship Program and serves on the Board of Directors for The Addiction Medicine Foundation and for the Addiction Medicine Fellowship Directors Association. She is a past-president of the New England Region of SGIM and co-chair of the Alcohol, Tobacco and Other Drug Use Interest Group for SGIM. In 2017, she was recognized as a Macy Foundation Faculty Scholar

  • Merceditas Villanueva

    Associate Professor of Medicine (AIDS)

    Research Interests
    Acquired Immunodeficiency Syndrome; Global Health; Infectious Disease Medicine

    Dr. Villanueva is Director of the HIV/AIDS Program and Associate Professor of Medicine at Yale University School of Medicine. She obtained her undergraduate degree at Harvard University and MD at Washington University. She completed Internal Medicine Residency training at Duke University and subspecialty fellowship training in Infectious Diseases at Yale.

    After fellowship, she left academia to work at Waterbury Hospital, a community hospital, where she was Chief of Infectious Diseases. During this time, she established the Ryan White-funded HIV clinic which worked closely with community based AIDS organizations. Her experience in promoting collaborations became the basis for subsequent research interests and her recruitment back to Yale.

    A major focus of her academic work has been on developing HIV educational curricula for medical providers including Yale house staff and community providers throughout CT. She also serves as the Principal Investigator for the New Haven Ryan White HIV Continuum, a collaboration between different clinics and community organizations which promotes service coordination to improve quality of care for HIV patients, particularly those that are underserved. Her research interests focus on optimizing models of care that capitalize on partnerships between the medical establishment and community support.

  • Michael Virata

    Assistant Professor of Clinical Medicine; Director, HIV Clinical Services, Internal Medicine; Assistant Clinical Professor

    Clinical Interests
    Acquired Immunodeficiency Syndrome; Communicable Diseases; HIV; Clinical Laboratory Techniques; Men's Health; Travel Medicine

    My mission is to be able to serve the most diverse population possible. My passion is with HIV care and I have been involved with patients throughout my entire medical career. My goal is to find solutions to help control and possible eradicate HIV from the community.