A hypersensitivity pneumonitis associated with the inhalation of cork dust. the etiologic agents are fungi, including penicillium glabrum and aspergillus fumigatus, that colonize the cork and are released during cork processing.

Suberosis is a type of hypersensitivity pneumonitis usually caused by the fungus Penicillium glabrum (formerly called Penicillium frequentans) from exposure to moldy cork dust. Chrysonilia sitophilia, Aspergillus fumigatus, uncontaminated cork dust, and Mucor macedo may also have significant roles in the pathogenesis of the disease..