Bacterium typhi伤寒杆菌 A bacterium is identified as the cause for his duodenal ulcer. 一种细菌被断定为造成他十二指肠溃疡的根源。
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Their research, published in this week's Nature, studied the relationship between Salmonella typhi, the bacterium that causes typhoid fever, and the protein which, when faulty, causes cystic fibrosis.