Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector5989610.17816/kazmj59896Research ArticleChronic bronchitis from grain dustStepanovS. A.info@eco-vector.comSaratov Medical InstituteSaratov Research Institute of Rural Hygiene1503197152280813101202131012021Copyright © 2021, Stepanov S.A.2021<p>Together with E.A. Mavrina we examined 424 workers at elevators in Saratov region. In 17% of those examined work experience with grain did not exceed 10 years, in 23.9% of them was more than 10 years and in 20% more than 20 years. Chronic upper respiratory tract diseases were diagnosed in 28.7%, including chronic bronchitis in 17%. The power of exhalation and inhalation was reduced in 69.3% of those examined. The earliest sign of the harmful effect of grain dust is the reduction of external respiration function, which, according to E.A. Mavrina (1966), is observed both in persons with chronic bronchitis and the initial stage of pneumoconiosis, and in persons without clinical signs of lung damage.</p>Kazan Medical archiveКазанский медицинский архив