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Table 1 Sources and major antigens of extrinsic allergic alveolitis (hypersensitivity pneumonitis)

From: Spotlight on the diagnosis of extrinsic allergic alveolitis (hypersensitivity pneumonitis)

Disease Causative exposure Antigens
Farmer's lung Mouldy hay Saccharopolyspora rectivirgula (Micropolyspora faeni), Thermoactinomyces vulgaris, Aspergilli
Bagassosis Mouldy sugar cane fiber Thermoactinomyces sacchari
Humidifier/air-conditioner lung Contaminated forced-air systems, heated water reservoirs S. rectivirgula, T. vulgaris, various fungi
Bird breeder's lung Pigeons, parakeets, fowl Avian proteins (of bloom or faeces)
Metal working hypersensitivity pneumonitis Microbially contaminated metal working fluid Various moulds and bacteria
Cheese worker's lung Cheese mould Penicillium casei
Malt worker‘s lung Mouldy malt Aspergillus clavatus
Paprika splitter‘s lung Paprika dust Mucor stolonifer
Mollusk shell hypersensitivity Shell dust Proteins in dust from sea snail shells or mother-of-pearl shells
Chemical worker’s lung, isocyanate alveolitis Manufacture of plastics, polyurethane foam, rubber Trimellitic anhydride, diisocyanates