132 DISEASES OF SWINE 



atic gland — the precrural — and in well-marked cases of cholera 

 this gland is also hemorrhagic in appearance, swollen, and softened. 



Portal Lymph-gland. — Another gland that should always be 

 examined, and which will be commonly found affected, is the gland 

 located in the depression on the under surface of the liver — the 

 portal gland. In practically all well-marked cases of lymphatic 

 involvement changes will be found in this gland which are of the 

 hemorrhagic type, as described in the other glands. 



Renal Lymph-gland. — Located in the notch of the kidney, at 

 the point of entrance of the renal artery, there is found another 

 small lymph-gland. This gland does not seem to share in the 

 pathologic changes as freely as other abdominal visceral glands, 

 but it will usually be found somewhat swollen and often spotted 

 with hemorrhage. 



Lymph-glands of Thoracic Cavity. — When we open into the 

 thoracic cavity we will find there a number of important lymph- 

 glands which are also often involved in the changes produced 

 by the disease. This will be especially true in those cases in which 

 there is well-marked evidence of the disease in the lungs and heart. 



Bronchial Glands. — These are located in the fork or division of 

 the trachea into its larger branches, and are normally of quite good 

 size. In cholera, where there is a marked involvement of the 

 lungs, these glands will be found swollen and discolored by hemor- 

 rhage and markedly softened. 



Mediastinal Glands. — Between the lungs there normally exists 

 a small area, known as the mediastinal space. In this space we 

 find a chain of lymphatic glands, named, after their location, the 

 mediastinal glands. These also are frequently affected, and take 

 part in the general involvement of the lymphatic structures. The 

 lesions present in no way differ from those found in other glands 

 of the body, and consist of sweUing, softening, and discoloration 

 with blood. As in other glands, the discoloration may be very 

 slight or it may be well marked. 



In connection with the discoloration of lymph-glands in the 

 thoracic cavity, it is well to remember that in hogs that are allowed 

 to run in yards where large amounts of coal-dust are present a large 

 quantity of the coal particles are inhaled or breathed in, and often 

 are permanently lodged not only in the lungs, but also in the lymph- 



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