Hypersensitivity pneumonitis refers to an inflammation of the lungs caused by repeated breathing in of a foreign substance, such an organic dust, a fungus, or a mold.

The technical name for it is Hypersensitivity pneumonitis which is an "inflammation of the lungs due to breathing in a foreign substance, usually certain types of dust, fungus, or molds."

https://health.google.com/health/ref/Hypersensitivity+pneumonitis

NPR had a brief in 2010 about hypersensitivity pneumonitis in some wind players whose horns were trapping various mold and bacteria.

Since we do not understand what causes idiopathic interstitial lung diseases, there is no way to prevent them. What can be done is to prevent extensive scarring of the lungs by making the diagnosis shortly after the first symptoms develop.

Pneumonitis refers to lung tissue inflammation. Bisegmental pneumonitis refers to inflammation of the lung tissue with occurs in two segments.