<unk>  can be separated into several distinct categories based upon causative agent. * Hypersensitivity<unk>  (Extrinsic Allergenic Alveolitis) describes the inflammation of alveoli which occurs after inhalation of organic dusts (oxford). These particles can be proteins, bacteria, or mold spores and are usually specific to an occupation. * Acute Interstitial<unk>  can result from many different irritants in the lungs and usually is resolved in under a month. * Chemical<unk>  is caused by toxic substances reaching the lower airways of the bronchial tree. This causes a chemical burn and severe inflammation. (oxford) * Radiation<unk> , also known as Radiation Induced Lung Injury, describes the initial damage done to the lung tissue by ionization radiation. Radiation, used to treat cancer, can cause<unk>  when applied to the chest or full body. Radiation<unk>  occurs in approximately 30% of advanced lung cancer patients treated with radiation therapy. * Aspiration<unk>  is caused by a chemical inhalation of harmful gastric contents which include causes such as: * Aspiration due to a drug overdose * A lung injury after the inhalation of habitual gastric contents. * The development of colonized oropharyngeal material after inhalation. * Bacteria entering the lungs
Pneumonitis
Bronchitis
Pneumonia
Croup
Hydrothorax
Bronchopneumonia
Bronchorrhea
Tracheitis