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[目的]了解某县改水降氟工程运行情况及地方性氟中毒防治效果。[方法]于2009年4~6月,从某县随机抽取8个镇,调查共计32处改水降氟工程质量及出厂前后水中氟含量,检查8个镇共计1 059名8~12周岁儿童氟斑牙患病情况,并从每个镇随机抽取50名8~12周岁儿童检测尿氟含量。[结果]32处改水降氟工程中,正常使用16处,正常使用率50%,间歇使用5处,可用共计21处,受益人口18 835人。水源水中氟含量与改水后管网末梢水中氟含量有差异(T=1.000,P=0.001)。有5镇儿童尿氟含量中位数>1.40 mg/L。儿童氟斑牙的平均检出率为48.91%,缺损率为14.92%,氟斑牙指数为1.06。[结论]该县改水降氟工程运行情况不佳,多数地区改水后水中氟浓度依然超标,改水降氟工作任重而道远。
[Objective] To understand the operation of water and fluoride reduction project in a county and the prevention and treatment of endemic fluorosis. [Method] From April to June 2009, eight towns were randomly selected from a county to investigate the quality of the water and fluoride removal works in a total of 32 places and the fluoride content in water before and after delivery. A total of 1,059 children aged 8-12 years Dental plaque prevalence, and from each town randomly selected 50 children aged 8 to 12 urine fluoride detection. [Result] Of the 32 water and fluoride removal projects, 16 were used normally, 50% were used normally, 5 were used intermittently, 21 were available and 18 835 beneficiaries were used. The fluoride content in the water source water was different from the fluorine content in the water of the pipe network (T = 1.000, P = 0.001). There are 5 children with urinary fluoride urinary median> 1.40 mg / L. The average detection rate of children dental fluorosis was 48.91%, the defect rate was 14.92% and the dental fluorosis index was 1.06. [Conclusion] The operation of water and fluoride reduction project in this county is not good. The fluoride concentration in water after the water diversion in most areas is still excessive, and the work of water and fluoride reduction has a long way to go.