1988 Volume 41 Issue 10 Pages 714-719
Four cases of deliveries of sickly calves suffering from hypoplasia, dysstasia and dysphagia occured successively at a Japanese Black cattle farm in Yamagata Prefecture during April to June, 1982.
At autopsy, necrotic foci in liver parenchyma and hyperplasia of bile duct walls were recognized in a calf. Moreover, a mature fluke was detected in the rumen and fasciola eggs were also detected in the feces of this calf.
Histopathologically, in the liver of 3 calves, fibroplasia, hyperplasia of bile duct walls and infiltration of eosinocytes were recognized. Furthermore, migratory tracts caused by worms, young migrating flukes and fasciola egg nodules were also observed in the liver. In the lungs of these calves, exudative changes of pulmonary alveoli with fibrin, eosinocytes and macrophages, and infiltration of eosinocytes into stromal tissue were observed.
Haemato-biochemical findings on these same three sickly calves, as well as their maternal cattle and others that fed with them generally suggested chronic hepatitis. Furthermore, either agargelprecipitation reaction or parasitological egg examination on the above mentioned animals showed positives results.
