Plague transmission may have begun a century before the Black Death, study shows
Yersinia pestis, the bacterium that causes plague ... Professor Fancy said, "In the thirteenth century, of course, there were ...
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History of the Plague
2007. "Yersinia pestis Orientalis in Remains of Ancient Plague Patients." Emerging Infectious Diseases 13 (2): 332–33. Garrelt, Christina, and Ingrid Wiechmann. 2003. "Detection of Yersinia pestis DNA ...