Farmer's lung is an hypersensitivity pneumonitis induced by the inhalation of biologic dusts coming from mouldy hay or other agricultural products. The immune response is most often initiated by exposure to thermophilic actinomycetes. Hypersensitivity pneumonitis is an inflammation of the lung caused by the bodys immune reaction to small air-borne particles. ... Moldy cream cheese Molds (British English: moulds) are various fungi that cover surfaces as fluffy mycelium and usually produce masses of asexual, sometimes sexual spores. ... Stacked hay in Romania A bale of grass hay weighing approximately 70 pounds, able to be managed by one person without need for mechanized equipment Close view of grass hay. ... A request has been made on Wikipedia for this article to be deleted in accordance with the deletion policy. ... Orders Subclass Acidimicrobidae     Acidimicrobiales Subclass Actinobacteridae     Actinomycetales     Bifidobacteriales Subclass Coriobacteridae     Coriobacteriales Subclass Rubrobacteridae     Rubrobacterales Subclass Sphaerobacteridae     Sphaerobacterales The Actinobacteria or Actinomycetes are a group of Gram-positive bacteria. ...