导致黑死病的细菌 演变成更致命但更具有传染性的细菌 研究发现 Bacteria causing the Black Death evolved to become less deadly but more contagious, study finds.

研究人员发现,造成黑死病的Yersinia害虫细菌几个世纪以来一直幸存下来,不断演变,制造的致命性更低、可传染性更强的菌株。 Researchers have found that the Yersinia pestis bacterium, responsible for the Black Death, survived for centuries by evolving to create less deadly and more transmissible strains. 这种演变涉及改变单一基因,即致病元件,导致毒性降低和感染期延长,使疾病进一步蔓延。 This evolution involved changes to a single gene, pla, leading to reduced virulence and longer infection periods, which allowed the disease to spread further. 这一发现可以提供对管理现代瘟疫爆发的洞察力。 This discovery could offer insights into managing modern plague outbreaks.