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.
thing - a separate and self-contained entity. backwater - a body of water that was created by a flood or tide or by being held or forced back by a dam; the bayous and backwaters are breeding grounds for mosquitos. bay, embayment - an indentation of a shoreline larger than a cove but smaller than a gulf.