洞庭湖区居民一般居住在防洪大堤内侧，因生产、生活常有人群到堤外侧血吸虫病易感地带活动。为探讨洞庭湖区居民暴露疫水方式，暴露频率、不同居住地和血吸虫病感染的关系，选择３０个村作为纵向研究试点，１９８７～１９８９年对居民暴露疫水频率及血吸虫病感染率进行了观察 Dongting Lake residents generally live inside the flood control embankment, often because of production and living crowd to embankment outside the embankment susceptible zone activity. In order to explore the relationship between the pattern of exposure to water, exposure frequency, different places of residence and infection of schistosomiasis in Dongting Lake area, 30 villages were chosen as the longitudinal study. The frequency of exposure to water and the infection rate of schistosomiasis were observed from 1987 to 1989