Conclusion Sanyuan district is a severe endemic of Paragonimiasis causing by P.skrjabini.And also the endemic area of Spirometra mansoni, Hymenolopis diminuta and Echinostomatidae.

• 结论三元区为以斯氏狸殖吸虫为主的肺吸虫病高度疫源地，同时也是盂氏裂头绦虫、缩小膜壳绦虫及一种棘口吸虫的自然疫源地。