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为了阐明人群化疗后再感染的原因，为及时调整防治对策提供依据，我们对汉寿县五一村1990～1997年血吸虫病调查资料进行了分析。1对象与方法1．1概况汉寿县五一村位于目平湖西岸，与有螺湖洲牧牛坪和安福障仅一堤之隔。6个村民小组中有4个沿江堤100m内居住（一层），2个在江堤8
In order to elucidate the causes of re-infection after chemotherapy and provide the basis for timely adjustment of prevention and treatment measures, we analyzed the survey data of schistosomiasis from Wuyi village, Hanshou county from 1990 to 1997. 1 objects and methods 1.1 Overview Wuyi Village, Han Shou County is located in the west bank of Lake Muping, and Conchou Muyangping and Anfu barrier only one embankment. Four of the six villager groups live within 100m of the embankment (first floor) and two at the river bank (8)