Four diseases are now widely acknowledged to be caused by H. pylori: duodenal ulcer, gastric ulcer, adenocarcinoma of the distal stomach, and gastric mucosa-associated lymphoid tissue lymphoma.

• 目前已经知道至少四种疾病与幽门螺旋杆菌有直接相关：十二指肠溃疡、胃溃疡、胃窦腺癌及胃黏膜淋巴癌。