Which of the following is associated with hypersensitive pneumonitis
Correct Answer: Byssnosis
Description: 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*.
Category:
Pathology
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