Hypersensitivity pneumonitis involves inhalation of an antigen. This leads to an exaggerated immune response (hypersensitivity). Type III hypersensitivity and type IV hypersensitivity can both occur depending on the cause. Diagnosis. The diagnosis is based upon a history of symptoms after exposure to the allergen and clinical tests.
Whitewater definition, of or moving over or through rapids: whitewater rafting down the Colorado River. See more.
whiteÂ·fish. n. pl. whitefish or whiteÂ·fishÂ·es. 1. a. Any of various freshwater salmonid food fishes of the genera Coregonus and Prosopium chiefly of North America, having a generally white or silvery color. b. Any of various similar or related fishes, such as the lake herring, whiting, or menhaden. 2. See beluga.