Genetic analysis of prehistoric burial sites has uncovered evidence of the oldest known plague outbreak, dating back 5,500 years, according to multiple reports. Researchers extracted ancient DNA from the remains of hunter-gatherer children buried together, confirming that Yersinia pestis, the bacterium responsible for plague, was present at the time, as detailed by New Scientist and Science News.
The graves, located in Eastern Europe, provide crucial insight into early disease transmission among prehistoric populations. The children’s simultaneous deaths and their burial context suggest the outbreak was lethal and affected small, mobile human groups, Science News explains. This challenges previous assumptions that plague pandemics only arose with the rise of settled agricultural societies.
Scientific American highlights that this discovery pushes back the timeline of plague outbreaks by several millennia, predating known epidemics such as the Justinian Plague and the Black Death. These findings question long-held views about the origins and evolution of the plague bacterium, indicating it was already established in natural reservoirs before it adapted to human hosts on a larger scale.
NBC News Health notes that the study employed advanced genomic sequencing techniques on both bone and tooth samples to identify the bacterium's DNA signatures conclusively. This evidence also provides a new understanding of how early human immune systems might have responded to infectious diseases, which has implications for tracing pathogen evolution through history.
Moving forward, researchers plan to investigate other ancient burial sites for plague DNA to map the spread and impact of early pandemics more broadly. As Guardian World reports, this work will help reshape the historical narrative of human-pathogen interactions and guide future studies in ancient epidemiology.
