<prompt> Which of the following is associated with hypersensitive pneumonitis -SilicosisAsbestosisByssnosisBerylliosis  <response>: Ans. is c i.e., Byssinosis Hypersensitivity pneumonitis o 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. o Etioloev: Inhalation of organic dust, most commonly spores of thermophilic fungi. o Depending on the occupation or exposure of specific antigen numerous names have been given to hypersensitivity pneumonitis. i Farmers lung -- Thermophilic actinomycete on mouldy hay or grain dust. ii Pigeon breeders lung -- Proteins from serum excreta or feathers of the birds. iii Air conditioner lung or Humidifier lung -- Thermophilic bacteria in heated water reservoirs. iv Bagassosis -- Sugarcane bagasse v Byssinosis -- Cotton dust vi Maple-bark disease -- Mouldy maple bark vii Mushroom-workers lung -- Mushroom compost dust viii Silo-fillers disease -- Toxic fumes of NO N20 due to fermentation of silage 