MORBID ANATOMY lOI 



muscle proper, the larger ones are in the intermuscular con- 

 nective tissue. They are usually accompanied by a consider- 

 able quantity of yellowish or blood-stained serous exudate. 

 The intermuscular connective tissue appears to be quite as 

 much involved as the subcutaneous connective tissues. 



The lymphatic glands are frequently though not uniformly 

 nor constantly enlarged. Those that are enlarged are edema- 

 tous and often hemorrhagic. The cervical and prescapular 

 glands are most seriously affected. 



The nasal mucous membrane in some cases is congested, 

 and a bloody serous discharge from the nostrils is present. 

 The tissues around the larynx are hemorrhagic and infiltrated 

 with blood-stained serum. The mucous membranes of the 

 larynx and trachea are more or less congested and covered 

 with a frothy mucus, sometimes streaked with blood. In some 

 instances no lesions are observable in these organs. The lungs 

 are in general almost fere from evidence of disease. Occasion- 

 ally there are a small number of hemorrhagic areas, pyramidal 

 in shape with their base on the pleura. In most cattle the 

 parietal pleura is studded with small hemorrhages. The 

 diaphragm sometimes contains very large hemorrhagic areas. 



The pericardial sac usually shows small, sometimes very 

 numerous, hemorrhages in the walls, and in many instances 

 contains a blood-stained serum. 



The heart walls, with but few exceptions, contain ecchy- 

 moses and petechiae. These sometimes extend deep into the 

 muscle. Similar areas of hemorrhage are also visible in the 

 endocardium. The heart usually contains post-mortem blood 

 clots. 



The blood, in animals just dead, is said to be somewhat 

 lighter than normal in color. When post-mortem changes 

 set in, the blood is darker in color, but reddens on exposure 

 to the air. 



The spleen shows on its surface a few small hemorrhagic 

 areas. It is usually normal in size, color and consistency, 

 except where post-mortem changes have taken place. 



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