凤仪洲1998年洪水溃堤后血吸虫病疫情分析

Analysis on the epidemic situation of schistosomiasis at Fengyi marshland after Dam break by flood in 1998

目的 分析凤仪洲特大洪水溃堤后对血吸虫病流行的影响。 方法 对溃堤后螺、病情进行流行病学调查 ,收集灾前有关年份疫情资料及水旱特征。 结果 1998年溃堤后 ,造成滩地钉螺扩散 ,有螺面积增加了 5 6 2 % ,灾后 1999年有螺框出现率、钉螺密度、阳性螺密度和钉螺感染率均明显下降。但 2 0 0 0年螺情很快回升 ,已恢复到 1998年水平 ,居民感染率呈持续上升趋势。 结论 洪水溃堤后 。

Objective To analyze the influence on the prevalence of schistosomiasis at Fengyi marshland after dam break by flood. Method To develop epidemiological survey on snail and disease after dam break and collect the information about epidemic situation and the character of waterlogging and drought before 1998. Result After dam break in 1998,it resulted in the pervasion of snail in the marshland,the area of snail increased by 56.2%,the rate of snail presented、density of snail、 density of infected snail and rate of infected snail all decreased remarkably in 1999.But rhe snail situation got back soon,and reachcd to the level of 1998 in 2000.The infection rate of people showed the rising trend. Conclusion It aggravated the prevalence of schistosomiasis at Fengyi marshland after dam break by Yangtz river flood.