Farmers lung is caused due to exposure to
Farmer's Lung This condition results from exposure to moldy hay containing spores of thermophilic actinomycetes that produce a hypersensitivity pneumonitis. Ref Harrison 19th edition 1691
Bacillus subtilis
Thermoactinomyces saccharri
Aspergillus fumigates
Penicillium nalgiovense
Respiratory system