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西藏那曲镇是世界上最高城镇之一 (海拔 45 0 0m) ,该地藏胞有长期饮用砖茶的习惯。为了解高海拔对砖茶型氟中毒的影响 ,使用FAO和WHO推荐的膳食与氟水平调查方法 ,Horowitz氟斑牙检查法 ,对这个镇一所学校及附近牧场共 3 2 3名藏族儿童 ,15户藏民家庭进行了膳食结构、饮茶习惯、环境氟水平、氟斑牙和尿氟含量的检查和检测。结果表明 ,藏族儿童氟斑牙患病率达 86 6 6 % ,氟斑牙指数 3 6 6 ,属氟中毒重度流行区。平均每人每日摄入 9 3 43mg的氟 ,99%以上来自砖茶。本研究从流行病学方面证实了有关海拔与氟中毒的实验室研究结果。
Nagqu, Tibet, is one of the tallest towns in the world (45o 0m above sea level) and has a long history of drinking brick tea. In order to understand the effect of altitude on brick-tea fluorosis, a total of 323 Tibetan children at a school and nearby ranch in the town were surveyed using the method of survey of dietary and fluoride levels recommended by FAO and WHO and Horowitz dental fluoroscopy. 15 Households in Tibet carried out inspection and testing on dietary structure, tea drinking habit, ambient fluoride level, dental fluorosis and urinary fluoride content. The results showed that the prevalence rate of dental fluorosis in Tibetan children was 86.66% and the dental fluorosis index was 366, which was a severe endemic fluorosis area. The average daily intake of 9 3 43mg of fluoride, 99% from brick tea. This study confirms the results of laboratory studies on altitude and fluorosis from an epidemiological perspective.