A bronchial provocation test with the allergen in question is definitive for the diagnosis. Exposure of laboratory animal workers to airborne rat and mouse urinary allergens. Occupational asthma caused by mink urine. Occupational asthma due to deer dander. Annal Allergy Asthma Immunol.
Subject are almost always atopic.
The asthma is typically IgE-dependent, but reactions of types III and IV may occur. Contamination of sacks by castor bean may be another cause of asthma. Green coffee beans and roasted coffee contain the same allergen but the levels are much lower in roasted coffee. The symptoms are often accompanied by rhinitis, conjunctivitis and urticaria. Diagnosis References IDR using a green coffee bean extract.