Bronchial bioptates of 97 liquidators of the Chernobyl accident consequences with chronic bronchitis and 23 patients of control nosological group as well as sputum (174 persons) and BAL (22 persons) of liquidators with chronic obstructive lung disease (COLD) were studied to define pathogenic role of automicroflora in the development of lung diseases. Such methods as electron microscopy, immunohistochemistry and microbiology were used. The revealed invasion of microorganisms occurred against the background of pathology of superficial bronchial epithelium with a decrease of HLA-DR and CD23 lymphocytes and increase of CD1c lymphocytes in lamina propria of bronchial mucosa of the liquidators.
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