title: Interstitial pneumonitis due to hypersensitivity to an organism contaminating a heating system.
mesh_terms: D000190:Actinomyces; D000391:Air Microbiology; D000906:Antibodies / Q000032:analysis; D004781:Environmental Exposure; D005203:Farmer's Lung / Q000276:immunology; D005260:Female; D006361:Heating; D006801:Humans; D006967:Hypersensitivity; D005779:Immunodiffusion; D008214:Lymphocytes / Q000276:immunology; D008875:Middle Aged; D011658:Pulmonary Fibrosis / Q000276:immunology*
chemical_list: D000906:Antibodies