江苏省农村人群蛔虫感染变化及影响因素

Changes of Ascaris lumbricoides infection in rural residents of Jiangsu Province and its influencing factors

目的调查江苏省农村人群蛔虫感染变化情况及其影响因素，为制定控制蛔虫感染对策提供依据。方法统计苏南、苏中和苏北1990～2002年间3次调查的农村人群蛔虫感染率、集体服药率、人均收入和自来水及卫生厕所使用率，探讨影响蛔虫感染率下降的主要因素。结果13年来，3个片区人群蛔虫感染率均持续大幅度下降，2002年平均感染率2．14％，下降率为94．58％。苏中感染率最低，仅0．41％，下降率达98．92％；苏北感染率最高，为5．09％，下降率最低，为89．97％。累计集体服药率苏中为159．00％，显著高于苏南的103．00％和苏北的105．00％。居民人均收入、自来水和卫生厕所使用率由北向南逐渐升高，3个片区间差异有统计学意义。结论集体服药防治和经济卫生条件共同影响农村人群蛔虫感染率变化，尤其集体服药防治的作用更显著。

Objective To investigate and analyze the changes of Ascaris lumbricoides infection in rural residents of Jiangsu Province during 13 years and its influencing factors in order to provide the basis of making practical policies for ascariasis control in future. Methods The data were analyzed about the rates of Ascaris infection and mass chemotherapy, per capita income, and the rates of the use of running water and hygienic toilets in the southern part, the middle part and the northern part of Jiangsu Province from 1990 to 2002, and the main influencing factors for Ascaris infection were explored. Results The prevalence rate of Ascaris infection decreased continuously during 13 years, from 39.51% to 2.14%, and the decrease rate was 94.58%. In 2002, the infection rate was the lowest, only 0.41%, decreased by 98.92 % in the middle part of Jiangsu Province, and the infection rate was the highest, 5.09%, decreased by 89.97% in the northern part of Jiangsu Province. The accumulated rates of mass chemotherapy were 159.00% in middle part of Jiangsu Province, 103.00% in the southern part of Jiangsu Province and 105.00% in the northern part of Jiangsu Prvince. The per capita income, the use of running water and hygienic latrines increased gradually from the northern part to the southern part and there were significant differences in the 3 survey regions. Conclusion The Ascaris infection rate is influenced by mass chemotherapy, economics and health conditions in rural residents, especially the mass chemotherapy.