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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Farmer&;s lung is caused by
assistant
The correct answer is  Farmer&;s lung - systemic and pulmonary reactions resulting from inhalation of dust from hay mould, mouldy straw, threshing dust, or by persons who have become hypersensitive to antigens in the dust, most often associated with inhalation of spores of micromonospora faenia or thermoactinomyces vulgaris. Ref: Baveja textbook of microbiology; 4th edition