Ancient Siberian plague discovery: The deadly secret locked inside ancient Siberian remains for 5500 years has finally been unearthed
A new study published in Nature finds that plague was highly lethal thousands of years earlier than previously believed and is now affecting small, mobile hunter-gatherer communities in the Lake Baikal region of eastern Siberia, a report finds.
Ancient DNA Reveals Early Plague in Hunter-Gatherer Societies
Researchers analyzed ancient DNA from human remains found in four hunter-gatherer cemeteries around Lake Baikal.
Using advanced sequencing techniques, they reconstructed bacterial genomes preserved in teeth. The results revealed previously unknown early strains of Yersinia pestis, the bacteria responsible for plague.
According to the Phys Org report, DNA of the pathogen was detected in 18 out of 46 people, or approximately 40%, indicating clear evidence of widespread infection in these communities.
A Deadlier Disease Than Expected 5,500 Years Ago
The findings challenge previous assumptions that early forms of plague were unable to cause large epidemics.
Instead, death patterns tell a different story. Many of the funerals included many children and young people; It was a pattern that had puzzled archaeologists for decades. Radiocarbon dating also showed that most of the deaths occurred within very short periods of time, sometimes involving the burial of siblings or parents and children together, according to the Phys Org report.
Genetic Clues Point to Highly Deadly Early Strains
Scientists discovered that these ancient plague strains carried a unique superantigen, a toxin-producing genetic factor not seen in later historical strains.
Superantigens can trigger excessive immune responses, increasing the severity of infection and making the disease highly fatal.
This suggests that early plague strains were already capable of causing devastating epidemics, even without flea-borne transmission, the researchers say, Phys Org reports.
How Could Plague Spread in Prehistoric Siberia?
The study also points to the possible origin of the plague in Central or Northeast Asia.
Evidence suggests that these hunter-gatherer groups may have been in close contact with marmots, large burrowing rodents that still carry plague today.
Researchers believe the disease may have spread directly from infected animals to humans in these early populations, Phys Org reports.
Rewriting the History of One of Humanity’s Oldest Diseases
A combination of genetic data, archaeological findings, and radiocarbon dating allowed scientists to reconstruct how these epidemics emerged.
The ancient strains carried a potent mix of virulence factors, making them capable of causing serious and often fatal infections, senior researchers noted in the Phys Org report.
FAQ
What did the new study discover about plague?
It turns out that plague was already highly virulent in hunter-gatherer communities in Siberia 5,500 years ago.
Where were ancient ruins found?
It was found in cemeteries in the Lake Baikal region of Eastern Siberia.
