2005~2007年全国血吸虫病疫情监测

目的综合分析2005-2007年全国血吸虫病监测点的监测数据，进一步掌握血吸虫病流行动态和规律。方法在全国选择80个血吸虫病监测点，整理分析人畜病情、螺情监测资料，分析监测结果。结果2005-2007年监测点总的居民感染率下降54．90％，年均下降18．30％；居民感染率〉5％的村数逐年减少，至2007年已无〉5％的监测点；连续3年所有年龄组居民感染率均下降；不同年龄组感染率高峰2005年出现在30-50岁组，2007年逐渐后移到50-60岁组。3年来家畜感染率下降了69．22％，其中黄牛和水牛感染率下降明显。有螺面积3年间压缩了8．84％，感染性钉螺面积压缩了53．23％。活螺平均密度、感染螺平均密度均逐年下降，但钉螺感染率3年间有反复。结论2005-2007年全国血吸虫病监测点人、牛感染率及螺情呈明显的下降趋势。

Surveillance of schistosomiasis in China from 2005 to 2007

Objective To analyze comprehensively the investigation data of the national schistoso- miasis surveillance sites from 2005 to 2007, in order to provide the evidence for mastering the endemic situation and pattern of schistosomiasis. Methods Eighty surveillance sites were selected, and the investigation data about schistosomiasis in residents and domestic animals and the status of Oncomelania snails in these sites were collected and analysed. Results From 2005 to 2007, the total infection rate in residents decreased by 54.90% （average decreased by 18. 30% each year）. The sites where the infection rate in residents was higher than 5% decreased year by year. In 2007, there was no site where the infection rate in residents was higher than 5% in all the 80 surveillance sites. All the infection rates in different age groups decreased for three years in succession, and the peak appeared at 30 --50 age group in 2005, but moved to 50--60 age group in 2007. The infection rate in domestic animals decreased by 69.22%, and the infection rate in cattle and buffaloes remarkably decreased. For the three years, the areas with snails reduced by 8. 84%, and the areas with infected snails reduced by 53.23%. The average densities of living snails and infected snails decreased year by year, but the infection rate of snails fluctuated during the three years. Conclusion The endemic situation of schistosomiasis in residents and cattle, and the status of snails, in general, remarkably decreased from 2005 to 2007.