The latest research reveals that early strains of the plague were responsible for human fatalities as far back as 5,500 years ago, predating the infamous Black Death. This study, published in the journal Nature, challenges the long-held belief that the plague was primarily a threat in crowded medieval cities and linked to rats. Researchers examined ancient DNA from human remains at four cemeteries in East Siberia, discovering that 39% of the samples contained Yersinia pestis, the plague-causing bacterium. This finding indicates that these ancient strains were already highly lethal and may have caused outbreaks in small hunter-gatherer communities. The study also highlights the presence of a unique genetic factor in these early strains, suggesting they were virulent even before the evolution of flea-borne transmission.
Why It Matters
This research is significant as it alters our understanding of the historical impact of the plague, suggesting that its deadliness existed far earlier than previously thought. The findings indicate that the plague may have originated in Central or Northeast Asia and spread through interactions with wild rodents, particularly marmots. Additionally, the unusually high mortality rate among children in ancient cemeteries has been linked to these early outbreaks, which had long puzzled archaeologists. Understanding the history of the plague provides essential context for studying its evolution and impact on human populations throughout history.
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