Liver disease in hog caused by Rhizopus cohnii

In a hog slaughtered for general deterioration of health and jaundice, tumoriform, nodular lesions were found in the liver. Histologically, there was coagulation necrosis sometimes liquefied in its central parts, lined with demarcation wall of neutrophilic granulocytes, or, with fibroblastic granulation tissue and infiltrates of histiocytes, eosinophilic granulocytes, lymphocytes and multinucleated foreign body giant cells. Within these lesions, there was mycelium of a Phycomycetes type. Cultures yielded Rhizopus cohnii.