Hayashi T, Tamura T
Department of Bacteriology, Hyogo College of Medicine.
Nihon Rinsho. 1993 Dec;51(12):3114-9.
Recent epidemiological reports of Helicobacter pylori (HP) reveal that HP is distributed among all populations in the world. The prevalence rate in the developed countries is generally, lower than that in the developing countries. The prevalence of HP increases with age both in the developed and the developing countries, reflecting a socioeconomic status; the poorer a population, the earlier is the age of infecting HP, resulting in the higher prevalence rate of HP. The epidemiological evidence indicates that person-to-person transmission of HP may occur, through either faecal-oral or oral-oral. Gastroendoscopy manipulation could be one of the transmission routes. In Japan, the prevalence above 40 years old was as high (70-80%) as that in the developing countries, whereas under 40 it was as low in the developed countries. This unique mode of prevalence in Japan may come from an ethnic background and requires further studies.
近期幽门螺杆菌（HP）的流行病学报告显示，HP在世界所有人群中均有分布。发达国家的感染率普遍低于发展中国家。在发达国家和发展中国家，HP的感染率均随年龄增长而升高，这反映了一种社会经济状况；人群越贫困，感染HP的年龄越早，导致HP的感染率越高。流行病学证据表明，HP可能通过粪-口或口-口途径在人与人之间传播。胃镜操作可能是传播途径之一。在日本，40岁以上人群的感染率与发展中国家一样高（70-80%），而40岁以下人群的感染率与发达国家一样低。日本这种独特的感染模式可能源于种族背景，需要进一步研究。
