Farmer's Lung is caused due to exposure to:

Answer is B (Thermoactinomyces Sacchari) The classic presentation offarmer's lung results from inhalational exposure to Thermophilic Actinomycetes species. Thermophilic actinomycetes species include Saccharopolyspora rectivirgula (formerly Micropolyspora faeni), Thermoactinomyces vulgaris, Thermoactinomyces viridis, and Thermoactinomyces sacchari Farmer's lung (Hypersensitivity pneumonitis, extrinsic allergic alveolitis) It is an immunologically mediated inflammatory disease of the lung involving the terminal airways. The classic presentation of farmer's lung results from inhalational exposure to Thermophilic Actinomycetes species. Thermophilic actinomycetes species include Saccharopolyspora rectivirgula (formerly Micropolyspora .faeni), Thermoactinomyces vulgaris, Thermoactinomyces viridis, and Thermoactinomyces sacchari, among others. Farmer's Lung may occasionally result from exposure to various Aspergillus species also Exposure to large quantities of contaminated moldy hay is the most common source of inhalational exposure for farmers who develop farmer's lung It is often a disease of dairy farmers who handle contaminated hay during the winter months. These organisms flourish in areas of high humidity and prefer temperatures of 40-60degC. Most cases of farmer's lung occur in cold, damp climates in late winter and early spring when farmers use stored hay to feed their livestock Patient typically presents 4-8 hours after exposure with fever, chills, malaise, cough, and dyspnea without wheezing