Scientists have recently made an intriguing finding: traces of an ancient disease have been discovered in a rather unexpected location—a 1,000-year-old gospel book. This revelation, based on research into the York Gospels, was announced by University College Dublin (UCD) in early September.
A study published in Science Advances details how UCD researchers traced the evolution of the sheeppox virus over thousands of years, utilizing ancient DNA preserved in manuscripts and animal remains. The virus primarily affects sheep, although it does not infect humans. Interestingly, the researchers identified DNA from the sheeppox virus in the animal skins that were used to create the parchment for the Gospel.
The York Gospels were composed in Canterbury during the late 900s by Anglo-Saxon scribes before making their way to York Minster, where they have resided for centuries. It’s fascinating to think about how these historical texts have endured through time while containing remnants of such a disease.
What’s particularly unexpected is how traces of the sheeppox virus were found not just in one type of animal skin, but on parchment made from both calfskin and goatskin. This opens up questions—could this suggest cross-species infections or perhaps some contamination that occurred during the parchment production process?
In their analysis, researchers compared the manuscripts with DNA extracted from Bronze Age sheep teeth and concluded that sheeppox has been a concern for livestock for over 3,700 years. They referred to the York Gospels as a “biological time capsule” due to the evidence it holds of this enduring virus.
UCD noted that sheeppox can spread quickly among flocks and poses serious risks, particularly for young animals, which could lead to significant challenges for communities relying on livestock. Such outbreaks can decimate herds—it’s a pretty daunting reality for farmers.
Louis L’Hôte, a Ph.D. candidate at UCD, emphasized how this discovery reveals the impressive capability of parchment to preserve traces of animal pathogens across centuries. He pointed out that unlike the smallpox virus, the genetic makeup of the sheeppox virus has remained remarkably stable over the millennia.
This stability suggests that previous genetic changes were essential in the virus’s evolution to infect its host. Understanding these patterns could—hopefully—lead to better strategies for handling the disease today. The current outbreak of sheeppox in Greece, which is causing economic damage, underscores the ongoing relevance of this research.
Overall, these findings add to a growing body of knowledge regarding ancient diseases that have impacted both humans and animals throughout history. It’s remarkable how modern science can shed light on these age-old issues, helping to unravel the complexities of past pandemics and their effects on societies.
