大理市山村有血吸虫感染钉螺螺点疫源性的纵向观察  

LONGITUDINAL OBSERVATION ON A SCHISTOSOME INFECTED SNAIL SPOT AS A SOURCE OF INFECTION IN A MOUNTAINOUS VILLAGE OF DALI CITY

作　　者：李飞[1] 夏代光[1] 马灿华[1] 贾雪梅[1] 张学筝[1] 

机构地区：[1]昆明医学院寄生虫学教研室,昆明650031

出　　处：《中国寄生虫学与寄生虫病杂志》1999年第3期165-166,共2页Chinese Journal of Parasitology and Parasitic Diseases

基　　金：云南省应用基础研究基金

摘　　要：目的： 探索阳性螺点疫源性的规律，为制定有效的防治血吸虫病措施提供科学依据。方法： 选择大理市沙里木庄村一个有血吸虫感染钉螺存在的螺点（简称阳性螺点）进行连续４ 年的纵向观察。每次均通过随机环境抽样法设框进行螺情调查，并将所捕获钉螺全部解剖，检测钉螺自然感染率。结果： ４ 年中共查螺８ 次，均查到活螺，且螺点的位置、范围相对稳定，其中有６ 次查获感染性钉螺，钉螺的平均感染率为３．９％ （８６／２ １５７）。结论： 云南山区阳性螺点的位置、范围疫源性相对稳定。因此，消灭阳性螺点是防治血吸虫病的最佳措施。AIM: To observe longitudinally the changes in survival and infection rate of Oncomelania snails in a positive snail spot in Yunnan.METHODS: A positive snail spot in a ditch in Shalimuzhuang Village,Dali City,was continually observed on the changes in the density of snail population and natural infection rate of the snails by random environmental sampling for 8 times in 4 successive years. RESULTS: During the 8 times of snail survey,living snails were found relatively stable in the ditch,in which positive snails were obtained in 6 occasions,the average infection rate being 3.99%. CONCLUSION: The density and the positive rate of snails in the mountain region remains relatively stable as a source of human infection. Elimination of the positive snail spots is necessary for controlling schistosomiasis.

关 键 词：血吸虫感染 钉螺 疫源性 流行病学 

分 类 号：R532.210.1[医药卫生—内科学]