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Anaphylaxis in Cattle

By

John Campbell

, DVM, DVSc, Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan

Last full review/revision Mar 2015 | Content last modified Jun 2016

Anaphylaxis or Type I hypersensitivity reactions in cattle can result in an atypical interstitial pneumonia. The lung is a major target organ in cattle for Type I hypersensitivity. Clinical signs are those of acute respiratory distress. Cattle that die of anaphylaxis may have lesions consistent with those described for atypical interstitial pneumonia. Treatment is administration of epinephrine; supportive treatment includes anti-inflammatory therapy with corticosteroids or NSAIDs. If pharyngeal or laryngeal edema is present, a tracheostomy may be indicated.

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Pleuropneumonia is most common in young athletic horses and is associated with several predisposing factors. Race and sport horses are particularly at risk for developing pleuropneumonia often due to which of the following factors?  
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