Monthly Archives: February 2013

Rats cannot have been intermediate hosts for Yersinia pestis during medieval plague epidemics in Northern Europe

Journal of Archaeological Science

Volume 40, Issue 4, April 2013, Pages 1752–1759

Rats cannot have been intermediate hosts for Yersinia pestis during medieval plague epidemics in Northern Europe

  • a University Museum of Bergen, University of Bergen, Norway
  • b Department of Physiology, Institute of Basic Medical Sciences, University of Oslo, P.O. Box 1103 Blindern, N-0317 Oslo, Norway
http://dx.doi.org/10.1016/j.jas.2012.12.007


Abstract

The commonly accepted understanding of modern human plague epidemics has been that plague is a disease of rodents that is transmitted to humans from black rats, with rat fleas as vectors. Historians have assumed that this transmission model is also valid for the Black Death and later medieval plague epidemics in Europe. Here we examine information on the geographical distribution and population density of the black rat (Rattus rattus) in Norway and other Nordic countries in medieval times. The study is based on older zoological literature and on bone samples from archaeological excavations. Only a few of the archaeological finds from medieval harbour towns in Norway contain rat bones. There are no finds of black rats from the many archaeological excavations in rural areas or from the inland town of Hamar. These results show that it is extremely unlikely that rats accounted for the spread of plague to rural areas in Norway. Archaeological evidence from other Nordic countries indicates that rats were uncommon there too, and were therefore unlikely to be responsible for the dissemination of human plague. We hypothesize that the mode of transmission during the historical plague epidemics was from human to human via an insect ectoparasite vector.


Effects of 1342 rainfalls at the Neckar river, southwest Germany

Written, archaeological, and geographical sources show the heavy effects of the rainfalls in summer 1342. The mostly refer to the river Main, the middle Rhine, Elbe, and Weser.  A charter from the town of Esslingen situated at the river Neckar, dated 9th of September 1342 documents a court ruling. The local Augustinian monastery sued  against Kaisheim abbey, which owned a nearby vineyard. Soil was flooded into the Augustinian monastery. The document shows that the rainfalls in summer 1342 also affected the Neckar valley.

 

 

The town of Esslingen depicted by Andreas Kieser. The wineyard ist situated below the castle
(HStA Stuttgart H 107/15 Bd 7 Bl. 22, via Wikimedia Commons)

 

Rainer Schreg

archaeologist researcher at Römisch-Germanisches Zentralmuseum Mainz - lecturer at Tübingen university

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