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1. The bacteria that causes this disease isknown as Yersinia pestis.
这种导致疾病的细菌被称为鼠疫杆菌。
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2.Researchers are studying the genetics ofthis bacterium to find waysto prevent it.
研究人员正在研究这种细菌的遗传学,以寻找预防它的方法。
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3. The bacterium can causeserious infections in humans, including pneumonia and meningitis.
这种细菌可以引起人类严重的感染,包括肺炎和脑膜炎。