[Effect of simultaneous exposure to fluorine and manganese on health status of workers].

The effect of fluorine and manganese on the health of workers continually exposed to these elements was studied. The concentration of the chemicals did not significantly exceed maximum allowable concentrations only during three hours of work daily. Thirty-six workers directly exposed to fluorine and manganese were examined and compared with the controls. The authors demonstrated that exceeding permissible norms did not cause evident intoxication symptoms even though working in exposure had lasted for many years. However, some changes in the activity of liver indicatory enzymes may be one of the first symptoms of this organ's damage. Frequently occurring ++periodontosis and leukoplakia of the mucous membrane needed careful stomatological prophylaxis .