A forgotten plague

Dysentery, or rödsot, as the disease was previously known in Sweden, continues to be a major scourge in developing countries. However, the disease has almost disappeared in the West. Very different circumstances prevailed before infectious diseases declined as some of the major causes of death during the 19th century. In that era, 10,000 people could die of dysentery in a single year in Sweden. The demographic consequences of dysentery in Sweden and the causes of the disease and its disappearance are discussed in this article. It is shown here that despite the devastating effects of dysentery epidemics, most government actions were targeted at cholera. Considerable regional and local differences are revealed as the disease is mapped over Sweden. Clusters of high mortality formed, and even in hard-hit Jönköping County some parishes were almost never affected. It becomes apparent that the outbreaks have been the result of complex interactions between different variables and have led to widespread disease of uneven and often epidemic proportions.

For the statistical analyses the digitized source material of the Demographic Data Base (DDB) at Umeå University has been used, containing statistical demographic data gathered from parishes from all over Sweden. Other sources drawn upon include published statistical data, reports from district medical officers, newspapers, parish registers, and maps.     

Diseases in Early Modern Sweden

In early modern Scandinavia, the population’s sensitivity to disease and food supply shortages was great. Researchers have long been interested in the crises caused by these conditions, and the dominant causes of death have been well documented in Sweden since the late eighteenth century. But for the seventeenth and early eighteenth century, in the mortality regime preceding the initial stage of the demographic transition, our understanding of the infectious diseases is significantly limited. Through an analysis of causes of death and tithe levels, this article gives new insight regarding mortality rates, harvests and, above all, diseases in a parish located in a Swedish forested area during the mid- and late seventeenth century and first half of the eighteenth century. It presents new research about which diagnoses were most common, how often the more prevalent diseases of fevers, smallpox, and dysentery broke out, and the varying role of diseases on mortality rates during bad harvest years. The inhabitants in this parish presumably had a food supply buffer in their summer farm system, yet they remained vulnerable to bad harvests, and people in the area were just as susceptible to the common infectious diseases as the inhabitants in more tightly populated areas.