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A man who worked for more than 20 years in a coffee-roasting factory developed lung lesions. By immunological investigations it was proven that there were circulating antibodies against coffee-bean dust in the patient9s serum. Immunofluorescence of the lung biopsy demonstrated deposits of IgG and complement along the alveolar capillaries. The histological features are described.
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D. Willem van Toorn (1970) studied this question.
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