<P> Helicobacter pylori , previously known as Campylobacter pylori , is a Gram - negative , microaerophilic bacterium usually found in the stomach . It was identified in 1982 by Australian scientists Barry Marshall and Robin Warren , who found that it was present in a person with chronic gastritis and gastric ulcers , conditions not previously believed to have a microbial cause . It is also linked to the development of duodenal ulcers and stomach cancer . However , over 80 % of individuals infected with the bacterium are asymptomatic , and it may play an important role in the natural stomach ecology . </P>
<P> Helicobacter pylori , previously known as Campylobacter pylori , is a Gram - negative , microaerophilic bacterium usually found in the stomach . It was identified in 1982 by Australian scientists Barry Marshall and Robin Warren , who found that it was present in a person with chronic gastritis and gastric ulcers , conditions not previously believed to have a microbial cause . It is also linked to the development of duodenal ulcers and stomach cancer . However , over 80 % of individuals infected with the bacterium are asymptomatic , and it may play an important role in the natural stomach ecology . </P>
where does the h pylori bacteria come from
where does the h pylori bacteria come from
the stomach
the stomach