Abstract:

Objective To understand the dynamics of human infection and reinfection of Schistosoma japonicum after chemo? therapy in marshland and lake endemic regions so as to provide the evidence for developing a cost?effective control strategy. Meth? ods From 2007 to 2011，the schistosome infection，intensities and reinfection of population were investigated and the results were analyzed dynamically in Caohui Village，a national schistosomiasis surveillance site in Changyi Township，Xinjian County， Jiangxi Province，China. Results The schistosome infection rate was 3.55% and the mean intensity was 1.56 in 2007，and the schistosome infection rate was 1.52% and the mean intensity was 1.60 in 2011. The reinfection rates were 2.70%，9.09% and 2.47% in 2009，2010，and 2011，respectively. Conclusion The schistosomiasis endemic situation shows a downtrend in the vil? lage. However，the reinfection is still serious；therefore，we should strengthen the research of risk factors of reinfection and control them.

Key words: Schistosomiasis japonica； Marshland and lake regions；Chemotherapy； Infection； Reinfection, Xinjian County

摘要：

目的 目的 了解湖沼型血吸虫病流行区人群血吸虫感染和再感染水平的变化趋势， 为制定防治对策提供依据。方 方法 法 选择南昌市新建县湖沼型血吸虫病流行区的昌邑乡曹会村为观察点， 分别于2007-2011年进行居民血吸虫感染情况调查， 分析人群血吸虫感染率、 感染者感染度 （EPG） 和再感染率等指标的变化趋势。结果 结果 2007曹会村人群感染率为 3.55%、 感染者的平均感染度 （EPG） 为1.56， 2011年分别为1.52%和1.60。2009-2011年逐年居民再感染率分别为2.70%、 9.09%和2.47%。结论 结论 湖沼型血吸虫病疫区村疫情总体呈下降趋势， 但再感染现象较严重， 应加强对再感染危险因素的研究与防控。

关键词: 血吸虫病； 湖沼型流行区； 化疗； 感染； 再感染； 新建县