A Deadly Outbreak of Plague, Nearly 5,000 Years Before the Black Death

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1. 2d ago

   Ancient DNA Reveals Plague Outbreaks 5,500 Years Ago

   The oldest known evidence of plague was found in the skeletons of Siberian hunter-gatherers. The disease killed members of small, mobile communities long before the rise of cities or agriculture. Young children were particularly hard hit by these early strains.

   What's confirmed:

   • Ancient DNA from 5,500-year-old skeletons in Siberia shows the oldest known evidence of plague.
   • The disease was caused by Yersinia pestis bacteria.
   • Early plague outbreaks occurred in small, mobile hunter-gatherer communities before the existence of cities and farming.
   • Young children and teenagers were severely impacted by the disease.
   • The Black Death killed up to 50% of Europe's 14th-century population.
   • A study published in Nature included researchers Dr Ruairidh Macleod, Professor Christopher Ramsey, and Professor Rick Schulting.
   confidence 100%
2. 3d ago

   Siberian DNA Analysis Reveals Plague Outbreak 5,500 Years Ago

   Researchers identified ancient plague strains in Siberian hunter-gatherer cemeteries dating to 5,500 years ago. The disease caused rapid family outbreaks that killed many children and young teenagers. This evidence shows plague was lethal before the existence of cities or farming.

   What's confirmed:

   • Plague existed 5,500 years ago in Siberia.
   • Early plague strains were found in nearly 40% of the individuals studied.
   • The disease caused rapid family-based outbreaks that killed many children and young teenagers.
   • The Black Death peaked between 1347 and 1353 and killed up to 50 million people in Europe.
   confidence 100%
3. 4d ago

   Plague struck hunter-gatherers 5,500 years ago—earliest known outbreak

   Genetic analysis confirms the oldest evidence of plague, dating to 5,500 years ago in Siberia, where it devastated hunter-gatherer communities—particularly children—before the rise of agriculture or cities. The discovery reshapes understanding of plague’s origins, showing it was lethal long before the Black Death. DNA from ancient teeth and graves reveals human-to-human transmission and acute mortality rates. Researchers link the outbreak to strains of *Yersinia pestis* distinct from later, more virulent forms.

   What's confirmed:

   • Plague bacteria (*Yersinia pestis*) caused lethal outbreaks among hunter-gatherers near Lake Baikal, Siberia, approximately 5,500 years ago, predating the Black Death by millennia.
   • The earliest outbreak struck children and adolescents, with acute mortality documented in four separate cemeteries and a 39% infection detection rate.
   • Genetic reconstruction shows human-to-human transmission within familial groups, occurring over a single generation.
   • Ancient DNA from teeth and skeletal remains confirms the presence of plague strains ancestral to later, more virulent forms linked to the Plague of Justinian and Black Death.
   • The outbreak occurred in mobile hunter-gatherer communities long before the emergence of agriculture or urban centers, challenging prior assumptions about plague’s ecological requirements.
   • Functional differences in the bacterial genome, including the *ypm* superantigen locus, distinguish these early strains from modern *Yersinia pestis* and suggest evolutionary divergence.
   • The study, published in *Nature*, provides the oldest known plague genomes, dating the bacterium’s emergence to at least 5,500 years ago.

   Still unconfirmed:

   • The outbreak may have been triggered by a gene mutation enabling the bacterium’s long-term survival, though this link requires further validation.
   • Some reports speculate the plague’s early strains lacked key virulence factors for bubonic plague, but morbidity and mortality rates remain uncertain without additional genetic or archaeological data.
   confidence 96%