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日本血吸虫病肝损害的原因,大多数认为是虫卵直接的、间接的在肝内门静脉阻塞,或者是虫卵的毒素作用。然而也有人说,感染日本血吸虫病经过一定时期以后,肝损害无恶化(古沢,1958)。还有人认为单纯感染日本血吸虫病时不会发生肝硬化,如果同时存在,则必须有例如营养障碍等的重要因素(Symmer1951),为了探讨本病与肝损害的关系,作者等在山梨县的甲府盆地进行了流行病学调查。甲府盆地,最近几年由于消灭了中间宿主钉螺,日本血吸虫病也显著减少,重度感染、再感染几乎没有发生。作者等在该地选择了两组病例进行观察;一组是高中学生,是在1966～1968年在校三年间,每年
Most of the causes of liver damage in schistosomiasis japonica are the direct or indirect obstruction of the portal vein in the liver or the toxins of the eggs. However, others say that after a certain period of infection with schistosomiasis japonica, there is no worsening of liver damage (Furukawa 1958). Some people think that pure infection with schistosomiasis japonica does not occur when the liver cirrhosis, if both exist, you must have important factors such as nutritional disorders (Symmer1951), in order to explore the relationship between the disease and liver damage, the author in Yamanashi Prefecture Kofu The basin conducted an epidemiological survey. In the Kofu Basin, schistosomiasis japonica was also significantly reduced in recent years due to the elimination of the intermediate host snail, with severe infection and re-infection almost never occurring. The authors chose two groups of cases for observation here; a group of high school students, who were in school for three years from 1966 to 1968, each year