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.     

城市空间扩散增长模型与模拟

城市模型模拟是上世纪90年代上半期形成并迅速发展的地学计算理论、方法与应用研究的最重要领域,国外以M. Batty为代表的规划与地理学家们进行了开创性的研究,取得了很多有用成果。本文借鉴这些学者的研究思路,从城市土地利用与开发的视角,利用疾病感染、传播机理的模拟方法,研究城市空间扩展、演化动力学过程的模型模拟问题;为模拟城市土地开发利用在不同阶段的表现与特征,研究了基本模型的不同变换形式;讨论了基于细胞自动机模型的城市空间扩展模型的计算结构,依据模拟结果,探讨了以城市形态扩展特征为指标进行城市分类的可行性,尝试对城市地理学的模型模拟方法作一拓展。     

Perspectives on the Rise and Fall of Swedish Cardiac Epidemics

Morbidity and mortality in cardiovascular diseases (CVD) can be described as an ongoing epidemic, although a very protracted one, lasting more than 100 years. Cardiovascular diseasesstill top mortality rates in the world today, accounting for about 30% of all deaths around the globe. But it is in the industrialized world that CVD dominate, although differences are great among various regions. Myocardial infarctions are significantly more common in Sweden than in southern Europe, but less common than in Eastern Europe. The overall question concerns the consequences for health in areas on the road to a post-industrial society. Over the years a clearer link has become visible between lifestyle and health. In Sweden, infectious diseases diminished as result of rising living standards. At the same time cardiovascular diseases were beginning their upward phase, reaching a peak in the 1960s. Deaths due to CVD bring to light significant discrepancies related to socio-economic and cultural factors. A comparison of the Swedish twin cities Linköping and Norrköping show considerable differences in death rates in favour of Linköping, amounting to about 30% fewer in the 1920s with a tendency toward rising differences thereafter. A preliminary investigation of diagnoses has shown that links commonly made between health and socio-economic patterns need revision. The differences in cardiovascular morbidity show another pattern than was expected. It is obvious that the neighbourhood environments themselves have significance, and that the inequalities need additional research based on complementary explanatory models.     

The Poliomyelitis Epidemic in Johannesburg in 1918: Medical and Public Responses

ABSTRACT

This article traces the appearance of poliomyelitis in Johannesburg during the first recognised epidemic in South Africa in the early months of 1918. The course of the epidemic is examined by reviewing available statistics and investigating the problems that the epidemic imposed on medical and health authorities, both locally and within higher echelons of power. The response of the Johannesburg community to the disease is explored, as are the treatments available to polio patients at a time when the disease was regarded as ‘a mystery’. The place of the 1918 epidemic in the wider history of polio in South Africa is also explored.     

The Spatial Dynamics of Epidemic Diseases in War and Peace: Cuba and the Insurrection against Spain, 1895–98

This paper examines the spatial transmission and rate of propagation of three infectious diseases (enteric fever, smallpox and yellow fever) in times of war and peace in Cuba between 1895 and 1898. For the three diseases studied, the analysis will demonstrate that, compared with peacetime, the Cuban Insurrection caused increased epidemiological integration of the settlement system of Cuba, acceleration of the spatial processes of disease transmission and a marked change in the geographical drift of infectious disease activity. While the first two findings may be attributed to the heightened levels of population mixing that accompanied the insurrection, the third implies that hostilities fundamentally altered the spatial courses of diseases. These changes transcended stark biases in the predisposition to infection among Spanish soldiers (to yellow fever) and Cuban civilians (to smallpox). Finally, it is shown that the military were the prime agents causing contrasts in the epidemiological experience of Cuba between war and peace.     

The changing shape of island epidemics: historical trends in Icelandic infectious disease waves, 1902–1988

Iceland's centuries-long history of epidemics with its unusually complete disease records has attracted study from several disciplines. But detailed spatial data of particular interest to historical geographers date only from 1895 and were consistently maintained for about a century thereafter. Within this period, this paper concentrates on morbidity records of reported cases of infectious diseases for an 87-year window which was open between 1902 and 1988. In this time slice, spatially detailed data for seven demographically important infectious diseases allow the geography of 131 discrete epidemic waves with a recorded total of 529,000 cases to be tracked. Changes in the behaviour of the seven diseases over the period are analyzed and related to both epidemiological theory and to the changing historical geography of the island. The paper complements earlier Icelandic work by the authors on the historical geography of single diseases (measles, influenza and poliomyelitis) by extending the range of diseases, and by considering their common spatial behaviour and their interrelationships.