Abstract
Summary
Sera from farmer's lung patients and non-farmer's lung control individuals were reacted with trichloroacetic acid extracts of moldy hays. All the sera from patients with acute symptoms and two-thirds of the total which included recovered farmer's lung patients formed specific precipitin lines with the moldy hay extracts. No precipitin lines were obtained with sera from healthy farmers who had no history of farmer's lung or with extracts of good hay. Evidence is presented to show that farmer's lung is associated with the presence of specific antibodies in the patients“sera against antigens found in moldy hays and that these antigens are the cause of farmer's lung.
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