A number of different types of HP are known, since a wide range of allergens may produce an allergic reaction in the lungs. Many of them produce similar symptoms and abnormal physical findings, but some have their own typical features.
Hypersensitivity pneumonitis refers to an inflammation of the lungs caused by repeated breathing in of a foreign substance, such an organic dust, a fungus, or a mold.
The technical name for it is Hypersensitivity pneumonitis which is an "inflammation of the lungs due to breathing in a foreign substance, usually certain types of dust, fungus, or molds." https://health.google.com/health/ref/Hypersensitivity+pneumonitis
It is a form of lung disease that looks like ground glass on x-ray and CT scans. The most common causes of ground-glass opacity include usual interstitial pneumonia, nonspecific interstitial pneumonitis, desquamative interstitial pneumonia, hypersensitivity pneumonitis, pulmonary oedema and pulmonary haemorrhage, and pneumonias (particularly pneumocystis carinii pneumonia). Less common causes include alveolar proteinosis, acute interstitial pneumonia or other causes of diffuse alveolar damage or the adult respiratory distress syndrome, respiratory bronchiolitis and early radiation pneumonitis.
Cmv
Since we do not understand what causes idiopathic interstitial lung diseases, there is no way to prevent them. What can be done is to prevent extensive scarring of the lungs by making the diagnosis shortly after the first symptoms develop.
Hypersensitivity pneumonitis is not considered an accident; it is an inflammatory response in the lungs caused by inhaling organic dust, mold, or other allergens. This condition typically arises from chronic exposure to specific environmental triggers, often in occupational or residential settings. While the onset can be sudden and symptoms may feel accidental, the underlying cause is linked to exposure rather than an unforeseen event.
Inhaled or ingested allergens usually cause immediate hypersensitivity reactions.
Type I hypersensitivity reaction http://en.wikipedia.org/wiki/Asthma
NPR had a brief in 2010 about hypersensitivity pneumonitis in some wind players whose horns were trapping various mold and bacteria.
Pneumonitis refers to lung tissue inflammation. Bisegmental pneumonitis refers to inflammation of the lung tissue with occurs in two segments.
Delayed hypersensitivity reactions, also known as type IV hypersensitivity reactions, are caused by T cells recognizing antigens and triggering an immune response. This can happen hours to days after exposure to the antigen. Common triggers include certain drugs, metals, and infectious agents.
Wet basements can cause allergic reactions, runny noses, itchy-watery eyes, coughing, sneezing, throat irritation, asthma, hypersensitivity pneumonitis and a fever. http://www.ehow.com/list_6523214_health-risks-wet-basements.html#ixzz1MwTVZZ3l