为了解消灭血吸虫病地区血吸虫病人外源性输入情况,我们对张堰公社1980～1981年从外省、外县迁入的204人进行了流行病学调查。该公社已连续六年未查到钉螺,连续八年未检出小年龄病人和病牛,现有病人6例,仅占总人口的0.024％。目前,农村人员流动较频繁,迁入人员范围很广。张堰公社每年迁入人员约占总人口的0.40％,有80％以上人员来自血吸 In order to understand the exogenous input of schistosomiasis patients in the area where schistosomiasis is eliminated, we conducted an epidemiological investigation of 204 migrants from other provinces and counties in Zhangyang Weir from 1980 to 1981. The commune has not been found snail for six consecutive years, for eight consecutive years did not detect small-aged patients and cows, the existing 6 cases of patients, accounting for only 0.024% of the total population. At present, the movement of rural personnel is relatively frequent, with a wide range of immigrants. Zhang Yan commune every year, immigrants accounted for about 0.40% of the total population, more than 80% of people from blood-sucking