一、概况据最近估计,全世界有2亿血吸虫病病人,随着世界各地对水的需要,在过去10年中导致血吸虫病扩散到一些新的地区,发病率上升。有充分的证据说明,在一个地区范围内应用杀螺剂和监视措施,能有效地控制螺类和控制疫区疾病的传播。但应认识到,防制血吸虫病需要长时间的持续努力。 I. INTRODUCTION According to recent estimates, there are 200 million schistosomiasis patients in the world. The incidence of schistosomiasis has increased in some new areas over the past 10 years as the world needs for water. There is ample evidence that the application of snail control and surveillance in a regional context can effectively control snail and control the spread of disease in the affected areas. However, it should be recognized that long-term sustained efforts are needed to combat schistosomiasis.