Executive Committee

Executive Committee Members

Marc Mendelson

Marc Mendelson, South Africa


Marc Mendelson studied medicine at St. Mary’s Hospital, London and specialized in infectious diseases at Addenbrookes Hospital, Cambridge, where he attained his PhD in cytomegalovirus latency. Marc undertook post-doctoral studies at The Rockefeller University, New York, working on the interaction between Mycobacterium tuberculosis and dendritic cells, before transferring his research to Cape Town. He is now Professor of Infectious Diseases and head of the Division of Infectious Diseases & HIV Medicine at Groote Schuur Hospital, University of Cape Town, and director of the Cape Town GeoSentinel Travel Surveillance Network Site.

His main field of interest lies in national and international policy relating to antimicrobial resistance (AMR). He is the chair of the South African Ministerial Advisory Committee on AMR; South African lead for the Global Health Security Agenda Prevent-1 AMR Working Group; director of the South African National Antibiotic Stewardship Training Centre, and a member of the scientific advisory committee of the Global Antibiotic Research & Development Programme (GARDP). Marc is also a technical advisor to WHO on a variety of AMR-related projects.

Professor Mendelson is the chair of the Policy and Advisory Committee and serves on the Finance Committee.

Jonathan Cohen

Jonathan Cohen, United Kingdom


Jon Cohen is Emeritus Professor of Infectious Diseases at Brighton and Sussex Medical School, having served as the Founding Dean of the school from 2003-2013. Previously he was Professor of Infectious Diseases and chairman of the Department of Infectious Diseases and Bacteriology at Hammersmith Hospital, Imperial College, London.

His research interests are the pathogenesis and treatment of severe bacterial infections (septic shock). He has served on the Medical Research Council’s Infection and Inflammation Board and is currently on the scientific advisory board of the Lister Institute and chair of ARUK’s scientific strategy committee. He is a member of the editorial advisory board for Lancet Infectious Diseases, and he served five years as editor-in-chief of the International Journal of Infectious Diseases (IJID). He is a member of the Executive Committee of the ISID and was treasurer for two years before assuming the Presidency in 2014.

Dr. Cohen is the chair of the ICID Program Committee; chair of the Nominations Committee; and serves on the ISID Finance Committee.

Rana Hajjeh

Rana Hajjeh, Egypt

Secretary and President-Elect

Dr. Hajjeh did her undergraduate and medical studies at the American University of Beirut, Lebanon, and trained in internal medicine and infectious diseases at Emory University, Atlanta, GA. She is American Board certified in both specialties. In 1993, she joined the Epidemic Intelligence Service (EIS) at the U.S. CDC and has been at CDC ever since. From 2003-2005, Dr. Hajjeh was the director of the surveillance program at U.S. Navy Medical Research Unit-3 (NAMRU3) in Cairo, Egypt, where she worked closely with the WHO and countries in the region to set up systems for laboratory-based surveillance and outbreak response. From 2005-2009, Dr. Hajjeh was the director of Gavi’s Hib Initiative, a consortium including Johns Hopkins School of Public Health; the London School of Tropical Medicine and Hygiene; CDC; and WHO, which resulted in the introduction of Hib vaccines in the 73 poorest countries in the world and, in 2014, Rana won the Federal Employee of the Year Award for her Hib vaccine work. She is a visiting professor at Hopkins School of Public Health and Emory University School of Public Health and Medicine. Between 2008 and 2016, Dr. Hajjeh was the director of the Division of Bacterial Diseases at the National Center of Immunizations and Respiratory Diseases, CDC, where she led a team of nearly two hundred staff, responsible for bacterial respiratory and vaccine-preventable disease surveillance and response efforts in the US and globally. She has played an important role in the response and control of multiple domestic and global outbreaks that CDC has supported over the last two decades, including epidemic meningitis in Africa and Saudi Arabia; anthrax, SARS and cholera in Haiti; and recently MERS in Saudi Arabia and Ebola in West Africa. Currently, Dr. Hajjeh is the director of the Department of Communicable Diseases at WHO’s Eastern Mediterranean Regional Office, responsible for the prevention and control of various priority communicable diseases in the Middle East. Dr. Hajjeh is a fellow of IDSA, has published over 150 peer-reviewed papers and book chapters, and serves as a reviewer for multiple journals.

Dr. Hajjeh is the chair of the ISID Research Committee and serves on the ProMED and ICID Program Committees.

Sally Roberts

Sally Roberts, New Zealand


Dr. Sally Roberts is a graduate of the University of Auckland, School of Medicine. She is a clinical microbiologist and infectious diseases physician at Auckland City Hospital and is the Clinical Head of Microbiology at LabPlus, Auckland District Health Board. Since August 2011, she has been the National Clinical Lead for the New Zealand Health Quality & Safety Commission Infection Prevention and Control Program. She has been on a number of New Zealand’s Ministry of Health working groups.

Her main interests include the diagnosis of infectious diseases; prevention of healthcare-associated infections; and antimicrobial resistance.

Lindsay Grayson

Lindsay Grayson, Australia

Professor Lindsay Grayson graduated from Monash University Medical School in 1979 and completed Infectious Diseases training at New England Deaconess Hospital, Harvard Medical School, Boston in 1991; he completed his MD research thesis in 1994 and Master of Science (MSc) in Clinical Epidemiology & Clinical Effectiveness, Harvard School of Public Health, Boston in 1997. From 1991-2000, he was Deputy Director, then Director, of the Infectious Diseases and Clinical Epidemiology, Monash Medical Centre, Melbourne. Since 2000, Professor Grayson has been Director of Infectious Diseases and Microbiology, Austin Health and Professor of Infectious Diseases, Department of Medicine, University of Melbourne.

Professor Grayson is immediate past-President of the Australasian Society for Infectious Diseases and past-Chair of the Interscience Conference on Antimicrobial Agents & Chemotherapy (ICAAC) Program Committee for the American Society for Microbiology. He has had a longstanding interest in antimicrobial resistance, particularly related to staphylococci and enterococci and infection control.

Alison Holmes

Alison Holmes, United Kingdom

Alison Holmes is Professor of Infectious Diseases and Director of Infection Prevention and Control (DIPC) for Imperial College Healthcare NHS Trust. She is also co-director of the UKCRC funded National Centre for Infection Prevention and Management.

Professor Holmes is the chair of the ISID Education & Publication Committee and also serves on the ISID Research and Program Committees.

Gangandeep Kang

Gangandeep Kang, India

Professor Gagandeep Kang is a physician scientist who for many years was a Professor of Microbiology and Head of the Division of Gastrointestinal Sciences and the Wellcome Trust Research Laboratory at the Christian Medical College (CMC), Vellore. Focusing on vaccines, enteric infections and nutrition in young children, she combines field epidemiology with intensive laboratory investigations to develop data, insight and tools that have advanced both the science of infectious diseases and policy in India.

Professor Kang’s groundbreaking work has been recognized with numerous awards and honors. These include Woman Bioscientist of the Year from the Government of India (2006); several national awards and the Infosys Prize for Life Sciences (2016). In addition to her pioneering research in low resource settings, she contributes to the biomedical sciences through serving on numerous national and international editorial boards, research grant review boards, and scientific advisory committees. Recently Prof. Kang was appointed Executive Director of the Translational Health Service and Technology Institute (THSTI), an autonomous institute of the Department of Biotechnology, Government of India.

She holds MBBS, MD and PhD degrees from CMC and a Fellowship of the Royal College of Pathologists, London. She has also been elected to the Fellowship of the American Academy of Microbiology (2010), the Indian Academy of Sciences (2011), National Academy of Sciences (2013), the Faculty of Public Health in the UK (2016), and the Indian National Science Academy (2016).

Miguel O'Ryan

Miguel O'Ryan, 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. Dr. 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 immune compromised host

He was the principle investigator for the multinational trial of the human rotavirus vaccine (NEJM January 2006). Dr. 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. Dr. 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.

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

Paul Tamyah

Paul Tambyah, Singapore

Paul Anantharajah Tambyah is currently Professor of Medicine at the National University of Singapore and Senior Consultant Infectious Diseases Physician at the National University Hospital. He is also Research Director in the Division of Infectious Diseases of the National University Health System. After graduating from the National University of Singapore, he did his postgraduate training at the University of Wisconsin under Dr. Dennis Maki and since returning to Singapore in 1999 he has held a number of academic, professional and advisory appointments including Assistant Dean of the Yong Loo Lin School of Medicine. He is immediate past president of the Society of Infectious Diseases (Singapore) and Secretary-General of the Asia Pacific Society of Clinical Microbiology and Infection.

Ursula Theuretzbacher

Ursula Theuretzbacher, Austria

Ursula Theuretzbacher is a microbiologist and an expert on antibacterial drug research and development strategies and the use of antibiotics based on public health needs. She served as president of the International Society for Anti-Infective Pharmacology; founding president of the European Society for Clinical Microbiology and Infectious Diseases (ESCMID) PK/PD of Anti-Infectives Study Group; is an executive committee member of the International Society for Infectious Diseases; and chairs a working group of the International Society of Chemotherapy. Ursula was a member of the group who coordinated WHO’s Priority Pathogen List for research and development and lead scientist for WHO’s Clinical Pipeline analysis. She lectured at the University of Vienna for 10 years and was recently appointed ESCMID Fellow.

Her research has focused in three main areas.

• Public funding approaches for antibacterial research and development
• Initiatives to recover the global pipeline
• Strategies to improve the use of antibiotics

Zamberi Sekawi

Zamberi Sekawi, Malaysia

Professor Sekawi’s previous appointments include Deputy Dean, Head of Department, Technical Officer for the World Health Organization (based in Fiji) and Visiting Scientist at the Burnet Institute in Melbourne, Australia. He is recognized by his peers as an expert in his field with his appointments as internal and external examiners at both undergraduate and postgraduate levels and has been an invited speaker at many seminars and conferences. He is actively involved in research, has secured several research grants, has extensive publications and has won numerous research awards. His main research is on multi-resistant bacteria and virology (particularly hepatitis and respiratory viruses). He also supervises many postgraduate students. He was involved as a WHO Consultant on several occasions to the Solomon Islands, Cambodia and Papua New Guinea to assist on laboratory strengthening. He is actively involved in professional bodies, he had organized several national and international conferences.