杭州市溪蟹并殖吸虫囊蚴感染与人群感染情况调查

A Survey of Paragonimus Metacercaria Infection in Potamon Denticulata and Seroprevalence in Populations of Hangzhou

目的了解杭州市并殖吸虫中间宿主感染情况及人群感染情况,为防治肺吸虫病提供科学依据。方法选择临安市3个乡镇的3个村为调查点,分别抓取50～100只中间宿主(溪蟹、川卷螺),采用沉渣镜检法进行囊蚴感染率调查。分别采集50～100名当地人群静脉血,采用ELISIA法进行并殖吸虫血清抗体检测。结果3个调查点捕获溪蟹共计180只,分64批次进行个体解剖,平均阳性率为26.56%(17/64)。采集人群血清共172份,肺吸虫抗体阳性率为7.56%(13/172)。结论临安市溪蟹并殖吸虫囊蚴感染率较高,说明本虫呈分布广泛,存在自然疫源地。卫生部门应加强健康教育工作,指导人群改变不良的生活方式和饮食习惯,预防肺吸虫病的传播与流行。

OBJECTIVE To comprehend the natural infection situation of paragonimus metacercaria in intermediate host and seropreva- lence in population of Hangzhou City, providing evidence for the preventive strategies of paragonimiasis. METHODS The three villages in three towns of Lin＇ an were selected as the investigated spots. In every spot, microscopic examination for deposit was used directly to detect the metacercaria in 50-100 intermediate host （such as potarnon denticulata and simisalcospira calculus）. ELISA was used to de- tect the serum antibody of paragonimus in 50-100 blood samples of local crowds. RESULTS 180 potamon denticulata collected from three spots were divided into 64 groups for dissection, and the postive rate was 26.56% （17/64）. In 172 blood samples collected from; three spots, the seroprevalence was 7.56%（13/172）. CONCLUSIONS The infection rate of paragonimus metacercaria in potamon den- ticulata was relatively high in Lin＇an, which illustrated paragonimus was distributed widespread, and natural infectious focus existed. Therefore, to prevent from the paragonimiasis, administrative department of health should broader health education and instruct people to change unhealthy lifestyle and diet custom.