Extrinsic Allergic Alveolitis

Key points

• Extrinsic allergic alveolitis Extrinsic allergic alveolitis (EAA, also known as hypersensitivity pneumonitis) is a condition caused by hypersensitivity induced lung damage due to a variety of inhaled organic particles.
• bird fanciers' lung: avian proteins
• farmers lung: spores of Saccharopolyspora rectivirgula (formerly Micropolyspora faeni)
• malt workers' lung: Aspergillus clavatus
• mushroom workers' lung: thermophilic actinomycetes* Presentation