An analysis of surveillance outcomes of water-borne endemic fluorosis in Yushui district and Ningdu County of Jiangxi Province in 2014 / 中华地方病学杂志

ABSTRACT

Objectives To understand the control and prevention status of water-borne endemic fluorosis in Jiangxi Province, in order to provide a scientific basis for evaluate and perfect the strategies in control and prevention of the disease. Methods According to monitoring project of national water-borne endemic fluorosis, three villages were chosen to investigate the status and the fluoride content of fluorosis villages with water-improving and defluoridation projects in Yushui district and Ningdu county of Jiangxi Province. Investigation consisted of the status of dental fluorosis of children aged from 8 to 12 years and adult skeletal fluorosis, as well as fluoride content of drinking water and urinary fluorine. The standard detection methods of domestic drinking water was used for water fluoride content detection, fluoride selective electrode was chosen for urinary fluorine detection, Dean detection method was used to determine dental fluorosis, and diagnostic criteria of endemic skeletal fluorosis was chosen for diagnose of skeletal fluorosis. Results In fluorosis villages with water-improving and defluoridation projects which operated normally, the fluoride content of drinking water was lower than 1.00 mg/L. In fluorosis villages with water-improving and defluoridation projects which never operated normally, the average fluoride content of drinking water was 1.76 mg/L. The detection rate of dental fluorosis of children aged 8-12 years was 12.50%(22/176). A total of 294 adults were examined by X-ray, 3 adults were diagnosed as skeletal fluorosis, and the detection rate was 1.02%. A total of 294 adult urine samples were tested. The urinary fluoride content varied from 0.28 to 7.74 mg/L, and the geometric mean was 1.10 mg/L. Conclusions The illness condition of water-borne endemic fluorosis has been under control effectively. The maintenance of water-improving and defluoridation projects and surveillance were main tasks in control and prevention of the disease in the future.