The relationship of systemic phycomycosis and aspergillosis, in cattle showing clinical signs of disease, to the occurrence of lesions in different organs.

Cases of systemic phycomycosis and aspergillosis in cattle with clinical signs of disease were recorded from the literature. The incidence of these conditions in animals of different ages was noted in conjunction with the organ in which the lesions were found. The forestomachs and abomasum were considered separately from other affected organs. Phycomycosis was most commonly associated with the lungs and the other organ most frequently affected was the liver. Aspergillosis was a comparatively rare event but appeared to affect the same organs. Of the stomach compartments, lesions occurred most often in the abomasum and the age of the animals may be important. Lesions in the lymph nodes are generally associated with animals showing no clinical signs of disease.