Miguel O'Ryan


Full Professor at the Microbiology and Mycology Program at the Faculty of Medicine, University of Chile.



Miguel O’Ryan is Full Professor at the Microbiology and Mycology Program at the Faculty of Medicine, University of Chile where he currently holds the position of Director for International Affairs. He was Vice President for Research and Development of the University of Chile until August 2012; Director for Research and Development of the Faculty of Medicine until July 2014; and previously Director of the Microbiology and Mycology Program. Professor O’Ryan qualified at the Catholic University of Chile and studied pediatric infectious diseases at the University of Texas Health Sciences Center, Houston, Texas. He served as the president of the Chilean Infectious Disease Society from 1998–1999. His research has focused on three main areas.


  • Molecular and clinical aspects of enteric disease (mainly rotavirus, norovirus and more recently Helicobacter pylori).
  • New pediatric vaccines.
  • Infection in the immunecompromised host.

He was the principle investigator for the multinational trial of the human rotavirus vaccine (NEJM January 2006). Professor O’Ryan’s research, expert reviews, and editorials have been widely published in 106 indexed articles. He has co-authored 19 book chapters on topics that include enteric viruses; parasitic diseases in children; and medications used in pediatrics. Professor O’Ryan is an active member of the World Society for Pediatric Infectious Diseases (WSPID); Pediatric Infectious Disease Society of America (PIDS); the Sociedad Chilena de Infectologia; the Sociedad Latinoamericana de Infectologia Pediatrica (SLIPE); and is currently a member of ISID’s executive committee. He is currently or has been an editor of the Journal of Pediatrics; the Pediatric Infectious Disease Journal; the British Medical Journal; and in 2002 chaired the III World Congress of Pediatric Infectious Diseases. Dr. O’Ryan was elected member of the Chilean National Academy of Medicine in 2012.

Prof. O’Ryan is the chair of the External Affairs Committee.