Mycotic Pneumonia and Placentitis Caused by Mortierella wolfü: II. Pathology of Experimental Infection of Cattle

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Abstract
In acute fatal mortierella pneumonia of cattle all lobes of the lungs, except the posterior dorsal part of the diaphragmatic lobes, were heavy, red and wet. Subacute and chronic mortierella infection caused focal granulomas from 1 to 10 mm in diameter in lungs and some spleens. In the early stages of placentitis infarcts were present in the caruncle, but after abortion the caruncles were uniformly discoloured. Fetuses from cows with mycotic placentitis frequently had focal hepatitis, splenitis and encephalitis. The more acute lesions in the cows and those in the fetuses were characterised by coagulation necrosis, vasculitis, serofibrinous exudates, and infiltration by nneutrophils. The fungi in tissues appeared as nonseptate hyphae.

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