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Published on: November 30, 2021
Historic and Prehistoric Epidemics: An Overview of Sources Available for the Study of Ancient Pathogens
1Laboratory of Experimental Virology, Department of Medical Microbiology and Infection Prevention, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, 1105 AZ Amsterdam, The Netherlands.
Abstract:
Since life on earth developed, parasitic microbes have thrived. Increases in host numbers, or the conquest of a new species, provide an opportunity for such a pathogen to enjoy, before host defense systems kick in, a similar upsurge in reproduction. Outbreaks, caused by "endemic" pathogens, and epidemics, caused by "novel" pathogens, have thus been creating chaos and destruction since prehistorical times. To study such (pre)historic epidemics, recent advances in the ancient DNA field, applied to both archeological and historical remains, have helped tremendously to elucidate the evolutionary trajectory of pathogens. These studies have offered new and unexpected insights into the evolution of, for instance, smallpox virus, hepatitis B virus, and the plague-causing bacterium Yersinia pestis. Furthermore, burial patterns and historical publications can help in tracking down ancient pathogens. Another source of information is our genome, where selective sweeps in immune-related genes relate to past pathogen attacks, while multiple viruses have left their genomes behind for us to study. This review will discuss the sources available to investigate (pre)historic diseases, as molecular knowledge of historic and prehistoric pathogens may help us understand the past and the present, and prepare us for future epidemics.
Insights
Investigating ancient DNA from remains and our own genomes helps uncover the evolutionary history of pathogens. This molecular knowledge aids in understanding past epidemics and preparing for future disease outbreaks.
Area of Science:
- Paleomicrobiology
- Evolutionary Biology
- Genomics
Background:
- Parasitic microbes have influenced life's history, causing outbreaks and epidemics.
- Studying past pandemics is crucial for understanding disease evolution and future preparedness.
Purpose of the Study:
- To review diverse sources for investigating ancient pathogens and diseases.
- To highlight how molecular insights into historical pathogens inform present and future epidemic understanding.
Main Methods:
- Analysis of ancient DNA from archeological and historical remains.
- Examination of genomic data, including selective sweeps in immune genes.
- Utilizing historical publications and burial patterns to trace ancient pathogens.
Main Results:
- Ancient DNA studies have revealed evolutionary trajectories of pathogens like smallpox, hepatitis B, and *Yersinia pestis*.
- Host genomes contain molecular evidence of past pathogen interactions.
- Historical records and burial sites offer complementary data for pathogen tracking.
Conclusions:
- A multidisciplinary approach combining ancient DNA, genomics, and historical data is vital for studying prehistoric diseases.
- Understanding pathogen evolution through molecular analysis provides critical insights for managing current and future epidemics.
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