Hypersensitivity pneumonitis (HP) or extrinsic allergic alveolitis (EAA) is a rare immune system disorder that affects the lungs. It is an inflammation of the alveoli (airspaces) within the lung caused by hypersensitivity to inhaled organic dusts. Sufferers are commonly exposed to the dust by their occupation or hobbies.
Hypersensitivity pneumonitis (HP) is categorized as acute, subacute, and chronic based on the duration of the illness.
In the acute form of HP, symptoms may develop 4–6 hours following ...
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