.MORHID ANATOMY 521 



on her knees, the head extended and resting upon the ground. 

 She was frothing at the mouth and groaning as if in great 

 distress. She died in about two hours. 



Another report states that the sick animals were dull, 

 exhibited great weakness and walked with a peculiar jerky 

 movement of the hind legs. The animals trembled as if suffer- 

 ing from a chill. In a short time they fell down and appeared 

 to be in great distress, heads moving continually backward 

 and forward. A fourth owner observed a sick animal tremb- 

 ling violently for about two hours before it died. 



>^ 409. Morbid anatomy. In twelve animals which 

 died in cornstalk fields and were examined, post-mortem 

 changes were more or less advanced in the greater number. 

 A few were examined soon after death. The structural changes 

 in the organs were slight. This confirms the statement of 

 many veterinarians that the organs of the cattle dying of corn- 

 stalk disease are normal in appearance. 



The only gross pathological changes observed were those 

 of a hemorrhagic nature. The hemorrhages were mostly con- 

 fined to the serous membranes and especiall}' those of the 

 heart. Ecchymoses were more or less numerous, however, 

 beneath the pleura and under the capsule of the liver and of 

 the spleen. The mucosa of the intestinal tract showed areas 

 in which the capillaries were deeply injected. Occasionally 

 there were hemorrhages. In one case there were pronounced 

 hemorrhagic areas in the heart muscle, aorta and pleura. In 

 most cases the liver was pale in color and the acini presented 

 deep reddish centers with pale peripheries. The inner and 

 middle zones of the lobules were more densely congested than 

 the peripheral ones. A layer several lobules in thickness 

 immediately beneath the capsule was usually more engorged 

 with blood than the deeper portions of the organ. In the 

 more densely injected areas not only the blood spaces were 

 filled, but the liver cells were separated from each other by 

 a space of variable width containing blood corpuscles. In 

 some cases there were slight changes in the appearance of the 

 cellular protoplasm. 



