Micropolyspora faeni

Micropolyspora faeni

a thermophilic actinomycete which produces spores in moldy hay. The spores are inhaled by cattle eating the hay and cause granulomas and bronchitis, bronchiolitis, and a chronic interstitial pneumonia. It is also associated with chronic obstructive pulmonary disease in horses.
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An example is farmer's lung, which results from the inhalation of the microorganism Micropolyspora faeni found in moldy hay.