Pneumonitis or pulmonitis is an inflammation of lung tissue  due to factors other than microorganisms. Those can be radiation therapy of the chest , exposure to medications used during chemo-therapy, the inhalation of debris (ie animal dander), of food particles during vomiting, herbicides or fluorocarbons and some systemic diseases.
|Classification and external resources|
It is distinguished from pneumonia on the basis of causation as well as its manifestation since pneumonia can be described as pneumonitis combined with consolidation and exudation of lung tissue due to infection with microorganism.
- Viral infection. Measles can cause severe pneumonitis, and ribavirin has been proposed as a possible treatment. CMV is another cause.
- Radiation therapy
- Inhaling chemicals, such as sodium hydroxide
- Adverse reaction to medications
- Hypersensitivity to inhaled agents
- Inhalation of spores of some species of mushroom (bronchoalveolar allergic syndrome)
- Mercury exposure
- Overexposure to chlorine
- Bronchial obstruction (obstructive pneumonitis or post-obstructive pneumonitis)
- Ascariasis (during parasite migration)
- Hypersensitivity pneumonitis, also known as extrinsic allergic alveolitis (EAA)
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