对某部在疫区施工后，发生血吸虫病暴发流行情况进行了调查，并对参加施工的２２０名官兵做了环卵沉淀试验。结果发现有４７名阳性病人（环卵沉淀率≥３％）占调查人数的２１．３６％，其中出现咳喘、间歇性发热、皮诊等不同程度症状和体征的有３９例，占被调查人数的１７．７３％。 Investigation of the prevalence of schistosomiasis outbreak occurred in a certain area after construction in the affected area was carried out. Erosion and egg precipitation tests were conducted on 220 officers and men participating in the construction. The results showed that 47 positive patients (ring egg deposition rate ≥ 3%) accounted for 21.36% of the survey population, including cough, intermittent fever, skin examination and other symptoms and signs of varying degrees in 39 cases, were investigated 17.73% of the population.