求翻译：幽门螺杆菌是一种螺旋状、革兰阴性、微需氧性细菌。人群中几乎一半终身感染，感染部位主要在胃及十二指肠球部。幽门螺杆菌的全基因序列已经测出，其中尿素酶基因有四个开放性读框，分别是UreA、UreB、 UreC 和UreD。流行病学研究表明幽门螺杆菌感染了世界范围内一半以上的人口，其发病率各个国家不同，甚至同一国家的各个地区也不相同。是什么意思？

Helicobacter pylori is a spiral, Gram-negative, microaerophilic bacteria. Almost half of people infected for life, the main site of infection in the stomach and duodenal bulb. Helicobacter pylori genome sequence has been detected, including four urease gene open reading frame, respectively, UreA, Ur

H. pylori is a spiral, dengue fever, slightly negative, aerobic bacteria. In the crowd, almost a half-life-long infection symptoms mainly in stomach and intestinal ball Department 12 refers. H. pylori has been detected by the genome-wide sequence urea enzyme genes, of which there are four open readi

The pylorus spiral bacillus is one kind spiral-shaped, the leather blue negative, the micro aerobism bacterium.In crowd nearly a half lifelong infection, infection spot mainly in stomach and duodenum ball department.The pylorus spiral bacillus entire gene sequence already determined, in which urease

Helicobacter pylori is a spiral-shaped, Gram-negative, micro-aerobic bacteria. Crowd, almost half of lifelong infection, infection, mainly in gastric and duodenal bulb. Helicobacter pylori gene sequence has been detected, of which urea enzyme gene has four open reading frame, respectively is UreA, U