H. pylori may also be a cause or co-factor for gastric cancer, as its presence increases the risk of developing stomach tumours.

幽门螺杆菌同样是胃癌的病因或致病因子。幽门螺杆菌感染者发生胃癌的风险升高。

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"This naturally-occurring cholesterol offers a very specific target for the design of safer drugs that could treat stomach ulcers and, long-term, prevent stomach cancer linked with H.pylori, " said Dr Minoru Fukuda, who led the study.

BBC: Clues to beating stomach cancer

"H.pylori infection is now accepted as a cause of stomach cancer, " he told BBC News Online.

BBC: It is a relatively new area of cancer research