Comments
Acute presentation: flu-like illness with cough;
Subacute: recurrent "pneumonia";
Chronic: exertional dyspnea, productive cough, and weight loss;
The exposure is to moldy tobacco dust, and the suspected antigen is the fungus Aspergillus sp. [Asthma in the Workplace, p. 399] See "Hypersensitivity pneumonitis."