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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 ,加重了凤仪洲血吸虫病流行程度
Objective To analyze the influence of the epidemic of schistosomiasis after the Fengyi Island flood. Methods Epidemiological investigation of the snail after the breakwater was conducted to collect the epidemic information and the characteristics of flood and drought in the years before the disaster. Results After the dike was broken in 1998, the snails spread on the beach with an increase of 562%. After the disaster in 1999, there was a screw-frame appearance, and the snail density, the positive snail density and the snail infection rate decreased obviously. However, the snail rate picked up rapidly in 2000 and has returned to the level of 1998. The infection rate of residents shows a continuous upward trend. Conclusion The flood embankment aggravates the prevalence of schistosomiasis in Fengyizhou