Reported epidemiological findings of the state of blonchopulmonary apparatus using a questionnaire, physical and functional examination of workers allowed to reveal chronic bronchitis, mainly of stage I and initial signs of byssinosis in those working at enterprises on processing of low-quality cotton growth. Results of hygienic evaluation of the dust factor dictate the necessity of extending the existing method during examination of enterprises engaged in processing of fibrous vegetal dusts. The necessity is also substantiated of perfecting medical screening of this category of workers.