【摘要】 目的　掌握平垸行洪、移民建镇试点区螺情及野粪污染动态变化 ,为同类地区血防工作提供科学依据。方法　选择石首市、江夏区、团风县、黄州区平垸行洪洲垸为观察点 ,采用系统抽样与环境抽查相结合的方法调查螺情 ,同时进行野粪调查 ,用 Excel软件对调查资料进行统计分析。结果　钉螺面积 :黄州叶露州上升 12 .71% ,其余观察点维持原状 ;钉螺密度 :江夏三角州 1999～ 2 0 0 1年呈下降趋势 ,但 2 0 0 2年大幅回升 ,黄州叶露洲 2 0 0 0年下降 ,2 0 0 1～ 2 0 0 2年呈上升趋势 ,团风罗霍州呈上下波动 ,石首复兴洲维持不变。各试点除石首外均有阳性钉螺分布。洲滩野粪密度为 1.14～15 .6份 /hm2 ,野粪阳性率为 1.35 %～ 37.2 1%。结论　试点区洲滩野粪污染较严重 ,钉螺密度似有上升趋势 ,近几年钉螺面积无明显变化 ,但易感地带面积增大。因此 ,应加大查灭螺力度。更多还原

【Abstract】 Objective To understand the dynamic changes of snail situation and wild faeces pollution in marshlands in the pilot areas after leveling embankment for flood running and moving people from outside embankment to town for providing the scientific basis of schistosomiasis control in the same type areas. Methods Shishou City,Jiangxia District,Tuanfeng County and Huangzhou District were selected as the pilot areas. Snails were surveyed by the systematic and environmental sampling. Wild faeces were also investigated. The data were processed by Excel. Results Snail areas in Huangzhou Yeluzhou increased by 12.71%,in the others it did not change. For the snail density,there was a decline trend in Jiangxia Sanjiaozhou from 1999 to 2001,but it increased in 2002 obviously;in Huangzhou Yeluzhou it decreased in 2000,but increased again from 2001 to 2002;in Tuanfeng Luohuozhou it was fluctuation;it did not change in Shishou Fuxingzhou. Except Shishou City,the other three sites had infected snails distribution. The densities of wild faeces in the pilot areas were 1.14～15.60/hm~2. The positive rates of wild faeces were 1.35%～37.21%. Conclusion The marshlands in pilot areas were seriously polluted by wild faeces. There seemed to be an increase trend in the snail density. Snail areas did not change significantly in the last few years. However,the high transmission areas will expand. So the snail survey and snail control should be strengthened.更多还原