title: Hypersensitivity pneumonitis.
abstract: Hypersensitivity pneumonitis, a disease caused by repetitive inhalation of nonviable organic dust, is increasingly recognized as a cause of acute and chronic lung disease in both children and adults. Twenty-one of 32 children and adults who went on a hay ride in Arkansas developed this disease. These cases are reported. The clinical manifestations, pathology, differential diagnosis, treatment, and immunologic aspects of the disease are reviewed.
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000946:Antigens, Fungal; D001183:Arthus Reaction / Q000175:diagnosis; D002648:Child; D002908:Chronic Disease; D004391:Dust; D005260:Female; D006801:Humans; D006942:Hypergammaglobulinemia / Q000209:etiology; D006967:Hypersensitivity / Q000150:complications* / Q000276:immunology / Q000628:therapy; D005779:Immunodiffusion; D008297:Male; D011014:Pneumonia / Q000209:etiology* / Q000276:immunology / Q000628:therapy; D012882:Skin Tests
chemical_list: D000946:Antigens, Fungal; D004391:Dust