The Nobel Prize in Physiology or Medicine 2005

The Nobel Prize in Physiology or Medicine 2005

 

 

The Nobel Assembly at Karolinska Institutet has awarded the Nobel Prize in Physiology or Medicine jointly to Barry Marshall and Robin Warren for their discovery of the bacterium Helicobacter pylori and its role in gastritis and peptic ulcer disease. Thanks to this pioneering discovery, peptic ulcer disease is no longer a chronic, frequently disabling condition, but a disease that can be permanently cured.

  prize winners

Barry Marshall
Born 1951
Helicobacter pylori Research Laboratory, Queen Elizabeth II Medical Centre, Nedlands, Perth, Australia.

Robin Warren
Born 1937
Department of Pathology, Royal Perth Hospital, Perth, Australia.
 

human stomach

To cite this section
MLA style: The Nobel Prize in Physiology or Medicine 2005. NobelPrize.org. Nobel Prize Outreach 2025. Fri. 5 Dec 2025. <https://www.nobelprize.org/prizes/medicine/2005/7693-the-nobel-prize-in-physiology-or-medicine-2005-2005-6/>

Nobel Prizes and laureates

Six prizes were awarded for achievements that have conferred the greatest benefit to humankind. The 14 laureates' work and discoveries range from quantum tunnelling to promoting democratic rights.

See them all presented here.

Illustration

Explore prizes and laureates

Look for popular awards and laureates in different fields, and discover the history of the Nobel Prize.