Pedistric disease's aetiological agent.
小儿疾病的发病原因。
The presence of Helicobacter pylori in human gastric mucosa is now established as the aetiological agent of chronic gastritis and most cases of peptic ulcer and gastric adenocarcinoma world-wide.
幽门螺杆菌是慢性胃炎、消化性溃疡的病原体，也与胃腺癌及黏膜相关性淋巴瘤的发生密切相关。
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