Surveillance analysis of drinking water-born endemic fluorosis in 2009 in Xuchang city, Henan province / 中国地方病学杂志

ABSTRACT

ObjectiveTo investigate the status of an illness of endemic fluorosis in Xuchang city,and to evaluate the effect of implementation of control measures.MethodsIn 2009,Changge city and Xuchang county were chosen as survey counties(city).We investigated the surveillance counties (city) about the running state of water-inproving projects,and fluoride content of drinking water in the villages,and ten villages were chosen as survey villages,dental fluorosis and fluoride content of children aged 8 to 12,clinical skeletal fluorosis and urinary fluoride content of 16-year-old adult were investigated.ResultsIn all the villages with projects of defluoridation for drinking water of the two monitoring counties,that the projects was being used accounted for 61.39％(97/158),and the projects discarded accounted for 38.61％(61/158).In the 9 non-water-improving villages,the average water fluoride ranged 1.32 - 2.25 mg/L; in the 1 water-improving village,the mean water fluoride was 0.44 mg/L.The total rate of dental fluorosis of children aged 8 to 12 was 38.65％ (80/207),and the geometric mean of urinary fluoride was 1.65 mg/L.The rate of adult skeletal fluorosis by clinical detection was 0.30％ (9/2982),and the geometric mean of urinary fluoride was 2.09 mg/L.ConclusionsXuchang city is a mild to moderate fluorosis epidemic areas of endemic fluorosis,and condition of the disease has not yet been effectively controlled,and there is need to further intensify the prevention and control efforts.