RESUMEN
180 workers exposed to cement dust were examined in a bronchopulmonal screening including standardized history, clinical examination, spirometry and bronchial reactivity testing. The program proved to be suitable. The time needed for each person was 45 minutes. The workers have been selected in such a manner that the informational value of the methods of lung functional diagnostic could be verified in workers exposed to dust before manifestation of lung diseases. In view of individual diagnosis and rehabilitation bronchial reactivity tests lead to valuable information in workers exposed to cement dust. In the other hand no higher frequency of bronchial hyperreactivity in workers without lung diseases and exposed to dust could be proved. The rates of decrease of FEV1 after inhalation of acetylcholine, however, revealed a positive correlation to the duration of exposure.