Peter Katelaris

Professor Peter Katelaris serves as Clinical Professor at the University of Sydney's Concord Clinical School and Head of the Gastroenterology Department at Concord Hospital in the Sydney Local Health District. He holds the qualifications MBBS with First Class Honours from the University of Sydney, MD from the University of London, FRACP, FRCP (London), FGESA, and AGAF. His gastroenterology training occurred at Concord Hospital and St. Mark’s Hospital in London, where he completed his MD thesis on Helicobacter pylori. As a senior clinician, he specializes in luminal gastroenterology, addressing diseases of the oesophagus, stomach, small intestine, and colon.

In a multifaceted career spanning clinical practice, academia, research, teaching, and mentorship, Professor Katelaris has authored or co-authored 190 publications with 6,798 citations. His research focuses on areas such as colorectal cancer, inflammatory bowel disease, ulcerative colitis, endoscopy, gastrointestinal diseases, Helicobacter pylori antibiotic resistance, and gastroesophageal reflux. Notable publications include the Helicobacter pylori World Gastroenterology Organization Global Guideline (2022), for which he was lead author; Management of Patients With Refractory Reflux-Like Symptoms Despite Proton Pump Inhibitor Therapy (2024); QUADRATE study on quadruple versus triple therapies for H. pylori eradication (2002); and Second Asia-Pacific Consensus Guidelines for Helicobacter pylori infection (2009). He has significantly influenced the field through guideline development, serving as lead author of the World Gastroenterology Organisation Helicobacter pylori guideline and co-author of the WGO Reflux Guideline and Asia-Pacific Guidelines for H. pylori and reflux disease. Professor Katelaris is an inaugural assessor for the national Recertification in Colonoscopy Committee, contributing to clinical governance, working parties, and collegiate activities nationally and internationally. He also undertakes philanthropic work as a board member of ANZGITA, enhancing digestive disease healthcare standards in the Indo-Pacific region via medical teaching and capacity building. His excellence is recognized by the Gastroenterological Society of Australia, which awarded him the Young Investigator Award, Outstanding Clinician Award, and Inaugural Fellowship—one of only two Australian gastroenterologists to receive all three major career honors. Peers acknowledge him as an experienced clinician, endoscopist, researcher, mentor, and educator.

Professional Email: peter.katelaris@sydney.edu.au