Which of the following is associated with hypersensitive pneumonitis
Ans. is 'c' Byssinosis None of the options mentioned are known to cause hypersensitivity pneumonitis but out of these Byssinosis is most closely related to Hypersensitivity pneumonitis.Hypersensitivity pneumonitis describes a spectrum of immunologically mediated*, predominantly interstitial lung disorders caused by intense, often prolonged exposure to inhaled organic dusts and related occupational antigens.Etiology: Inhalation of organic dust most commonly spores of thermophilic fungi*.Depending on the occupation or exposure of specific antigen numerous names have been given to hypersensitivity pneumonitis.Farmer's lung - Thermophilic actinomycete on Mouldy hay or grain dust*.Pigeon breeder's lung - Proteins from serum excreta or feathers of the birds.Air conditioner lung (or Humidifier lung) - Thermophilic bacteria in heated water reservoirs.Also rememberHypersensitivity pneumonitis in a type III & Type IV (both) hypersensitivity reaction*.
Silicosis
Asbestosis
Byssnosis
Berylliosis
Respiration