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.
出处
《中国寄生虫学与寄生虫病杂志》
CAS
CSCD
北大核心
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
关键词
血吸虫感染
钉螺
疫源性
流行病学
Schistosomiasis, positive snail spot, source of infection