Barry Marshall
  • 2005 Nobel Prize in Physiology or Medicine


Australian physician and Professor of Clinical Microbiology at the University of Western Australia. He has been awarded the 2005 Nobel Prize in Physiology or Medicine along with Robin Warren "for their discovery of the bacterium Helicobacter pylori and its role in gastritis and peptic ulcer disease".

Education and Work Experience

1968-74, Bachelor of Medicine and Bachelor of Surgery, University of Western Australia
1975-78, Sir Charles Gerdner Hospital, Intern, Registered Doctor
1979-82, Chief Physician of Royal Perth Hospital,
1983-Present, Professor of University of Western Australia, Director of Marshall Center for Infectious Diseases, University of Western Australia

Honors and Awards

1995, Albert Lasker Award for Clinical Medical Research
1996, Gairdner Foundation International Award
1999, Fellow of the Royal Society (FRS) 2005, Nobel Prize in Physiology or Medicine

Major Academic Achievements

Marshall and Robin Warren showed that the bacterium Helicobacter pylori (H. pylori) plays a major role in causing many peptic ulcers, challenging decades of medical doctrine holding that ulcers were caused primarily by stress, spicy foods, and too much acid. This discovery has allowed for a breakthrough in understanding a causative link between Helicobacter pylori infection and stomach cancer.