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目的分析浙江省血吸虫病流行区达到传播控制(传控)、传播阻断(传阻)前、后螺情与病情的动态变化规律,为血吸虫病防治工作提供科学依据。方法选择浙江省秀洲区(水网型)、诸暨市(山丘型)为调查县。采取回顾性调查方法,搜集整理达到传控前10年至2008年的疫情资料,分析各县螺情、病情变化趋势及规律。结果秀洲区和诸暨市在达到传控标准之前,人畜病情和螺情总体呈明显下降趋势,且血吸虫人群感染率、家畜感染率与钉螺面积均呈正相关关系(r人=0.764,P<0.01,r畜=0.709,P<0.01;r人=0.775,P<0.01,r畜=0.676,P<0.01)。达到传阻标准后有残存钉螺复现,未查到本地病人、畜和感染性钉螺,但查到7例输入性传染源。结论浙江省达到血吸虫病传阻标准以来疫情稳定;但有残存钉螺和外来传染源输入。血防监测巩固工作的重点是查灭残存钉螺和防控外来传染源。
Objective To analyze the dynamic changes of spirometry and disease before and after the transmission control (transmission control) and transmission interruption (transmission resistance) in schistosomiasis endemic areas in Zhejiang Province, and provide a scientific basis for the prevention and control of schistosomiasis. Methods Xiuzhou District of Zhejiang Province (water network type), Zhuji City (hill type) for the investigation of the county. A retrospective survey method was used to collect and sort out the epidemic data from the first 10 years to the eighth year of transmission and analyze the spiral and trend of the illness and the laws of the disease in each county. Results Before Xiuzhou District and Zhuji City reached the standards of transmission and control, the overall incidence of human and livestock decreased significantly, and the infection rate of schistosomiasis and infection rate of domestic animals were positively correlated with snail area (r = 0.764, P <0.01 , r = 0.709, P <0.01; r = 0.775, P <0.01, r = 0.676, P <0.01). Residual snail reappeared after reaching the resistance standard. No local patients, animals and infectious snails were detected. However, seven cases of imported infectious agents were found. Conclusion The epidemic situation has been stable since Zhejiang reached the standard of resistance to schistosomiasis. However, there were remnant snails and imported sources of infection. The focus of blood-cancer surveillance consolidation efforts is to check surviving snails and prevent and control external sources of infection.