Contribuição ao estudo do bócio endémico no estado de Goiás. Análises de iodato de potássio em amostras de sal de cozinha

Abstract

The endemíc goiter hás a high prévalence in the State of Goiás with great number of cretinic forms, mental and physic deficience, imbecility and deaf-mutism. There is a law in Brasil since 1953 for addition of iodine in the salt used for preparing food, in áreas which prevalence higher than 15%. In the State of Goiás the prevalence was 34% in 1956. The analysis of potassium íodide was carried out by DNERu. in 1963, 1964 and 1967 and shpwed that only 13.15%, where within the normal leveis. It was showed in 1968 that in the city of Goiânia the endemic goiter hás a prevalence of 33,85% in a group of 1.046 students. In this work was showed by analysis of 150 samples of 25 differents commercial trades salts that out of 13 hás no any potassium iodide and no one had the limit indicate by law (17,8 to 28,5 mg/kg). With the exception of 4 trades, ali of them hás zero value in the inferior limit or excessive values in the superior limit, with demonstration that iodide is not added according to the law and the absence of controll of the salt distributed to the population by the industries. Accordind to the prophilatic method, the authors pointed out that the endemic goiter will continuing with high prevalence in the State of Goiás, if no controll will be done in the future.