[Acute respiratory diseases in patients with chronic pathology of the internal organs].

Follow-up of 2400 patients aged 17-84 who had previously had influenza or other acute respiratory diseases documented aggravation of the background illness in 34.1% of them. Because of the aggravation 15.3% of the cases were referred to hospitals. Augmentation of symptoms was primarily observed in chronic nonspecific pulmonary lesions (57.9%), bronchial asthma (30.5%), rheumatic fever (38.1%), peptic ulcer (31.6%), renal (42.7%) and thyroid (42.9%) diseases, climacteric neurosis (31.3%), neurovegetative disorders (61.1%). Typical symptoms and syndromes of aggravated background illnesses, principles of managing combined diseases and of respiratory affections prevention in the above patients are presented.