Abstract
A 50-year-old man, a wood worker, had been suffering from dyspnea with stridor after work for the past 9 years. He was admitted to our hospital. An antigen was extracted from the sawdust of “Boxwood”. The intracutaneous test with this antigen showed immediate wheal and flare reactions. Bronchial inhalation induction test with the antigen showed typical asthmatic attack of immediate type. This was a case of occupational asthma and the allergen was the sawdust of “Boxwood”, which had not been previously reported in any literature.
