Fluoride, a goitrogenic substance in drinking water, is another contributing factor to high GP. The fluoride concentration of drinking water was as high as 1.00 mg/kg in Chongqing municipality, which led Chongqing to have the highest GP (18.37%, 18 of 98) amongst all study areas.
Authors:
Douw G. Steyn, B.Sc., Dr. Med. Vet. (Vienna), D.V.Sc., Professor of Pharmacology, Medical Faculty, University of Pretoria;
J. Kieser, Artseksamen (M.D.), former Chief Medical Inspector of Schools, Transvaal Provincial Administration;
W.A. Odendaal, D.Sc., Research Officer in Nutrition, Union Department of Nutrition, Pretoria;
H. Malherbe, M.A., M.B.Ch.B., Senior Medical Officer, Poliomyelitis Research Foundation, South African Institute for Medical Research, Johannesburg;
H.W. Sn
With regard to the slight and temporary enlargement of the thyroid encountered in the age group 14-17 (type b), detailed scrutiny of the data . . . reveals that with a fall in mean fluorine content of the water from 10.7 mg/l in Kamaguda to 5.4 mg/l in Yellareddyguda, there was a corresponding progressive fall in the incidence of pubertal goiters from 40% in Kamaguda to 9% in Yellareddyguda, However, associated with the fall in fluorine content there was also a rise in mean iodine of the water.
