Bovine allergic pneumonitis: an acute outbreak associated with mouldy hay.
An outbreak of acute bovine atypical interstitial pneumonia is reported in association with feeding mouldy hay. Results of serological investigation and of provocation challenge indicated a hypersensitivity pneumonitis due to allergens of Micropolyspora faeni. Macroscopic and microscopic pulmonary changes were predominantly those of oedema and emphysema. These lesions were contrasted with more chronic changes reported in allergic pneumonitis of housed cattle.
D000821:Animal Feed; D000818:Animals; D000907:Antibodies, Bacterial / Q000276:immunology; D000942:Antigens, Bacterial; D002417:Cattle; D005260:Female; D008168:Lung / Q000473:pathology; D008848:Micromonosporaceae / Q000276:immunology*; D011016:Pneumonia, Atypical Interstitial, of Cattle / Q000209:etiology* / Q000473:pathology; D012130:Respiratory Hypersensitivity / Q000473:pathology / Q000662:veterinary*
D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial