Variable degrees of interstitial thickening are often present due to edema, minimal to mild mixed inflammatory cell infiltrates, and fibrosis. Neutrophils are present early in the course of experimental infection and true granulomatous pneumonia is rare, but can be seen (Board et al., 2003; Hartel...
At necropsy, the most frequently observed abnormalities reported are dehydration; cardiomegaly; myocardial necrosis; hemorrhagic lymphadenopathy; pulmonary edema with frothy fluid in the bronchi; hepatic and pulmonary congestion; petechial to ecchymofic pulmonary hemorrhages; generalized, acute pneumonia; hepat...