摘要
本文首次报道了云南省大山区人工感染的阳性钉螺在野外饲养条件下的平均寿命和逸蚴量。1987年8月感染的幼螺,3个月后,首次分离出135只阳性钉螺。从初次逸蚴起,存活至翌年6～9月的生存率分别为27.4、16.3、13.3和11.9％;平均逸蚴量依次为139.9、29.6、39.2和75条。阳性钉螺平均寿命为171.6d。每只阳性钉螺生存期平均逸蚴量为673条。当地阳性钉螺平均传播期估计可达半年以上。这对大山区血吸虫病流行因素的定量分析和防治策略的制定有其参考意义。
The life span and cercaria shedding of infected Oncomelania snails in a mountain region of Shitoudi village, Weishan County, Yunnan Province were observed in simulated local ecological environments. 135 infected snails were isolated for observation 3 months after exposure to miracidia in August, 1987. The snail survival rate from the day of initial cercaria shedding to next June, July, August and September was 27.4, 16.3, 13.3 and 11.9% respsctively, and the average number of cercariae shed was 139.9, 29.6, 39.2 and 75 per month respectively. The average life span of infected snails was 171.6 days. The average number of cercariae shed per snail in its whole life was 673.0. It was estimated that the average patent period of infected snails was over half a year.As this is the first report in our country in respect to the hfe span and cercariae shedding of infected snails in a mountain region, the result might be useful for quantitative analysis of epidemiological factors of schistosomiasis in this kind of endemic areas as well as for formulation of control strategy.
出处
《中国寄生虫学与寄生虫病杂志》
CAS
CSCD
北大核心
1990年第1期4-7,共4页
Chinese Journal of Parasitology and Parasitic Diseases
基金
联合国开发计划署/世界银行/世界卫生组织热带病研究培训特别规划的部分支持(ICP/RPD/001-A)
关键词
钉螺
日本血吸虫病
寿命
Snail, biology, life, schistosomiasis japonica, Yunnan
