The result showed that the infectiosity of crab which considered as second intermediate host was 6.82%;The infection rate of inhabitants was 5.69% and the rate of ingest undercooked crab was 28.41%.

• 第二中间宿主溪蟹肺吸虫囊蚴感染率为6.；82%25；人群血清肺吸虫抗体阳性率为5