Abstract:

Objective To understand the growth and decline of Oncomelania snail status in canals of Four Lake areas，so as to provide the evidence for formulating control strategy. Methods The data of snail investigations were analyzed retrospectively. Results The snail area decreased by 31.05%，the snail density decreased by 92.08，and the infection rate of snails decreased by 87.69% in 2010 compared with those in 1990. Conclusion During the period of 1990 to 2010，all the key indicators of snail sta? tus decline. However，we still need strengthen the snail control.

Key words: Oncomelania snail；Canal；Growth and decline；Four lake area；Qianjiang City

摘要：

目的了解1990-2010年四湖地区潜江市渠道钉螺消长情况，为制定血吸虫病防治策略提供参考依据。方法对1990-2010年四湖地区潜江市查灭螺情况进行回顾性分析。结果与1990年相比，2010年四湖地区潜江市渠道钉螺面积下降31.05%，钉螺密度下降92.08%，钉螺感染率下降87.69%。结论四湖地区潜江市20年间渠道主要螺情指标有所下降，其原因与开展药物和工程灭螺、洪涝灾害及环境影响因素等有关，应根据不同情况采取针对性防治措施。

关键词: 钉螺；渠道；消长；四湖地区；潜江市