Does H. pylori cause ulcers?
Because people with H. pylori infection are much more likely to develop peptic ulcers, it is felt that this infection causes peptic ulcers. About 90 percent of duodenal ulcers and 70 percent of gastric ulcers are related to H. pylori infection. On the other hand, most people with H. pylori infection do not get peptic ulcers which indicates that H. pylori infection by itself is not enough to cause ulcers, and other factors are involved. These factors may include smoking, alcohol use, difference between people and different strains of the bacteria.
