Signs and symptoms of hypersensitivity pneumonitis include
The symptoms resemble those of a flu-like illness. The sudden onset of the illness usually occurs after heavy exposure to the irritant, while long-term or chronic hypersensitivity pneumonitis occurs after prolonged lower-level exposure. Scarring (fibrosis) of the lung can occur in chronic cases.
Causes of hypersensitivity pneumonitis
The body's immune reaction to small particles in the air causes hypersensitivity pneumonitis. Different kinds of particles in the air, including bacteria, fungi, mold, or even chemicals or inorganic substances, can cause the inflammatory reaction.
Other hypersensitivity pneumonitis symptoms and signs
Main Article on Hypersensitivity Pneumonitis Symptoms and Signs
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