born 1951 · Co-author of the 1984 Lancet series on curved bacilli in gastritis and ulcer, Nobel laureate in Physiology or Medicine, 2005
Barry J. Marshall
NHMRC Helicobacter pylori Research Laboratory, QEII Medical Centre, Nedlands, Australia (affiliation listed by the Nobel Foundation for the 2005 prize); University of Western Australia, Perth (affiliation listed by the Nobel Foundation for the 2005 prize)
Barry J. Marshall is first author of the 1984 Lancet paper that described spiral or curved bacilli in gastric biopsies from patients with gastritis, duodenal ulcer and gastric ulcer, and second author of the 1983 Warren and Marshall letter. He shared the 2005 Nobel Prize in Physiology or Medicine with J. Robin Warren for their discovery of Helicobacter pylori and its role in gastritis and peptic ulcer disease.
Milestones
Sources
Marshall BJ, Warren JR. Unidentified curved bacilli in the stomach of patients with gastritis and peptic ulceration. Lancet. 1984;1(8390):1311-5.
Warren JR, Marshall B. Unidentified curved bacilli on gastric epithelium in active chronic gastritis. Lancet. 1983;1(8336):1273-5.
The Nobel Foundation. The Nobel Prize in Physiology or Medicine 2005 (NobelPrize.org API record: awarded 2005-10-03, each laureate 1/2; motivation text). Accessed 20 October 2026.
The Nobel Foundation. Barry J. Marshall (laureate record 789; birth date and Nobel-listed affiliations). NobelPrize.org API; accessed 20 October 2026.