Division of Infectious Diseases, Harbor-UCLA Medical Center 
Leading Patient Care, Training & Research

Excellence Mission:

  • Quality Patient Care
  • Training & Education
  • Leading Research
  • Community Service


Great Fellows... Great Experience


Division of Infectious Disease Fellows 2017-8


Roberta De Keyser, M.D.

Dr. De Keyser earned her undergraduate degree in Molecular Biology and Biotechnology at the University of the Philippines, where she graduated cum laude. She received her medical degree from the University of the East, and ranked third overall in her class. She then completed her residency in Internal Medicine at Eisenhower Medical Center in Rancho Mirage, California. While living in the Coachella Valley, she met a number of HIV/AIDS survivors and was inspired to be involved in spreading the word about early HIV diagnosis and treatment. She is a member of the Coachella Valley Research Community Initiative (CVCRI) whose objective is to promote healthy living in chronic patients. During her residency, she presented case reports in Infectious Diseases at various conferences including ATS (American Thoracic Society) and SGIM (Society of General Medicine).

Maita Kuvhenguhwa, M.D.

Dr. Kuvhenguhwa earned her undergraduate degree in Biological Sciences from UC Irvine, then obtained her medical degree from the Charles Drew/UCLA Medical Education Program within the David Geffen School of Medicine. There she completed a medical student thesis project entitled, “The Association of Patient and Provider Engagement with Adherence to HAART and Health-Related Quality of Life.” She went on to perform her internship and residency at Olive View-UCLA Medical Center, prior to becoming an ID Fellow at Harbor-UCLA Medical Center.

Jon G. Persichino, D.O.

Dr. Persichino earned his osteopathic medical degree at Western University of Health Sciences in Pomona, California. He then completed his internship and residency training in internal medicine at Loma Linda University Medical Center. Prior to joining the fellowship program in infectious diseases at Harbor-UCLA Medical Center, Dr. Persichino has worked as an academic hospitalist and HIV specialist at Riverside University Health System Medical Center in Moreno Valley, California for 10 years. He holds academic appointments as Associate Professor of Medicine at Loma Linda University School of Medicine and University of California, Riverside School of Medicine. He has published more than 10 peer-reviewed papers, book chapters and reviews in infectious diseases and internal medicine. His clinical research focuses on antimicrobial stewardship and infection control practices.


Timothy Hatlen, M.D.

Dr. Hatlen earned his undergraduate degree in Communications from the University of Washington and continued his education at the University of Washington School of Medicine for his medical degree receiving graduation with honors. He was inducted into the AOA and Gold Humanism Honor Societies.  He then completed internship and residency at the Internal Medicine Residency of Spokane.  There, he became a certified specialist in HIV medicine as well as expanded on international health interests spending one month training in Addis Ababa, Ethiopia, with a focus on HIV management, antibiotic stewardship, and medical student education.  He worked as a hospitalist for one year following graduation with ongoing research interests into opportunistic infections and HIV medicine.



Sindalisa Hean, M.D.


Dr. Sindalisa Hean earned her undergraduate degree in Molecular, Cell, and Developmental Biology from the University of California, Los Angeles. She received her medical degree from SUNY Downstate Medical Center in Brooklyn, New York. Inspired by her clinical experience at Kings County Hospital, she went on to continue her medical training in the county setting, returning to California to complete her internship and residency training at Harbor UCLA Medical Center. In addition to being involved in various research projects during her residency, she also performed a quality improvement project looking at barriers to timely antibiotic administration in patients with suspected sepsis. She also presented her Senior Grand Rounds on the topic of Zika Virus.



 Harbor-UCLA Medical Center is an active and integral training campus of the broader    David Geffen School of Medicine at UCLA

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