<prompt> Causative agent of Farmers lung is:Themophilus actinomycetesAspergillusPenicilliumglabrumRhizopus  <response>: Ans. a Themophilus actinomycetesRef: Robbins 9thpg 689; 8thpg 687In farmers lung, inhalation of proteins, such as thermophilic actinomyces bacteria and fungal spores that are present in moldy bedding and feed, are most commonly responsible for the development of Hypersensitivity pneumonitis. 