Australians win Nobel medicine prize

Barry Marshall and Robin Warren won the 2005 Nobel medicine prize Monday for their 1982 discovery that stomach inflammation and ulcers were mainly caused by bacteria, overturning the prevailing notion at the time that lifestyle and stress were the causes.

The Nobel Assembly of Stockholm's Karolinska Institute described the pair's discovery of the bacterium Helicobacter pylori and its role in gastritis and peptic ulcer disease