LOW-IODINE AND HIGH-FLUORIDE ENVIRONMENT – Cretinism

In the township Xinyuan, we examined 250 schoolchildren, aged 7-14 years.
The goiter prevalence was 91% and dental fluorosis 20.80%.
The average level of iodine in drinking water was 5.21 mg/l,
and that of fluoride 0.88 mg/l.

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LOW-IODINE & HIGH-FLUORIDE ENVIRONMENT – Cretinism

CRETINISM IN XINJIANG (China)

Lin Fa-Fu, Aihaiti, Zhao Hong-Xin,

Lin Jin, Jiang Ji-Yong, Maimaiti, and Aiken.

Extract:

… Xinjiang Institute for Endemic Disease Control and Research; Office of Leading Group for Endemic Disease Control of Hetian Prefectural Committee of the Communist Party of China; and County Health and Epidemic Prevention Station, Yutian, Xinjiang. Cretinism in iodine-deficiency areas is well known, yet the milder forms of somatic and psychomotor maldevelopment and thyroid dysfunction caused by iodine deficiency may be more difficult to detect. DeQuervain, in 1936, called this milder form “semi-cretinism,” while in 1980 Laggasse used the term “cretinoidism.” It was formally named “subclinical endemic cretinism” at a symposium on subclinical cretinism held in Xinzhou, Shanxi province in 1985.

Currently, attention is being focused on these disorders in China and abroad.

The Hetian prefecture in Xinjiang has reportedly been one of the Asian

areas most severely affected by iodine deficiency disorders (IDD).

During the period 1987-1989, we made a systematic survey of

subclinical endemic cretinism in this district under

a UNICEF aid Project.

MATERIALS AND METHODS

General conditions and selection of affected areas – The entire region of Xinjiang in central Eurasia is affected by iodine deficiency. The study area, located between the southern border of Tarim basin and the northern slope of Kunlun Mountains, is arid with sandy soil and an annual precipitation less than 50 mm. The cultivated alluvial plain extends from south to north with a steepening gradient. The geographical distributions of endemic goiter and endemic fluorosis are characterized by marked vertical zones. The inhabitants are of lower socioeconomic status, with an annual mean income of about 200 yuan (RMB) per person.

Area with high fluoride and low iodine levels (Area A) – In the township Xinyuan in the lower reaches of Kliya river in the county of Yutian, north of the highway, we examined 250 schoolchildren, aged 7-14 years. The goiter prevalence was 91% and dental fluorosis 20.80%. The average level of iodine in drinking water was 5.21 mg/l, and that of fluoride 0.88 mg/l.

Area with low iodine level (area B) – In the townships of Langan and Jiayi in the alluvial plain before the mountains and to the south of the highway, we examined 256 schoolchildren, aged 7-14 years. The goiter prevalence was 82% and dental fluorosis of 16.00%. The average water iodine level was 0.96 mg/l and that of fluoride 0.34 mg/l. ...

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More info on iodine → HERE

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HERE

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Newsweek 24 Feb.2015

  Water fluoridation in England linked to higher rates of under-active thyroid  

 

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