Korean J Asthma Allergy Clin Immunol.
2009 Dec;29(4):298-301.
A Case of Green Tea-induced Occupational Asthma
Abstract
- Tea is one of the most widely consumed beverages in the world. Green tea-induced occupational asthma among green tea factory workers is caused by inhalation of tea dust. Epigallocatechin gallate (EGCg) is known as a major causative allergen. A 41-year-old man started to work at the green tea factory in 2005. He experienced sneezing and rhinorrhea since 2006. He also had nasal obstruction, chest discomfort and dyspnea with wheezing since 2008 after exposure to green tea dust. Skin prick tests with extracts of several green teas and EGCg (100 mM/mL) showed a strong positive reaction to EGCg only. Bronchial provocation tests with EGCg (2.5 mg/mL) showed a dual asthmatic response. With these results, we confirmed that the patient had green tea-induced occupational asthma and rhinitis.
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