Abstract:

Objective To understand the dynamics and the diffusion trend of Oncomelania snails in Danyang City，Jiangsu Province，so as to explore effective control measures. Methods The data of historical records and routine surveillance of snails were collected and analyzed according to the river systems. Results The snails were imported from external river systems and spread from the rivers to inland. The diffusion trend was from the upstream to downstream and from the rivers to irrigation canals. Conclusion The inland rivers connecting with the Yangtze River are the main routes where marshland snails can spread from out? side to the inland. The irrigation system plays an important role in snail spreading to the irrigation areas. The regular surveillance in combination with the basic construction of farmland and irrigation system is needed to prevent the spread of the snails and the re? transmission of schistosomiasis japonica in Danyang.

Key words: Oncomelania snail； Dynamics； Diffusion； Danyang City

摘要：

目的 目的 调查与分析江苏省丹阳市水系钉螺消长与扩散趋势， 探讨有效的钉螺防控措施。方法 方法 综合利用历史资料和常规螺情监测数据， 按水系分析丹阳市有螺面积变化趋势以及扩散情况。结果 结果 丹阳市境内钉螺主要由外来水系输入， 经通江河道向内陆扩散， 并呈上游向下游、 河道至灌渠扩散趋势。结论 结论 通江河道是江滩钉螺向内陆扩散的主要通道， 灌溉系统则是钉螺向内陆灌区扩散的重要途径。应采取灭螺与防螺相结合的钉螺控制策略。

关键词: 钉螺； 消长； 扩散； 丹阳市