MORBJD ANATOMY 



20I 



■contain calcareous salts. General- 

 ization is common, in which case 

 the viscera are thickly sprinkled 

 with gray granulations which are 

 translucent throughout, or opaque 

 in their centers, and quite analo- 

 gous to those found in tubercular 

 lesions in other animals. 



As the disease most often re- 

 sults from ingestion of the virus, 

 the digestive apparatus and the cor- 

 responding lymphatic glands (sub- 

 maxillary, parotid, pharyngeal, su- 

 perior cervical, mesenteric, sub- 

 lumbar, etc.) may be decidedly 

 •diseased, while the other organs re- 

 main practically intact. Lesions of 

 the small intestine and of the 

 cecum are common and take the 

 form of ulcers of the mucous mem- 

 brane, of miliary nodules or of 

 tuberculous infiltrations, involving 

 at once the mucous, the muscular, 

 and subserous tissues. The lesions 

 in the liver take the form either of 

 miliary granulations, which are 

 yellow and caseous and scattered in 

 great numbers through the thick- 

 ness of the organ, or else of rounded 

 nodules which are yellowish white 

 in color, varying in size from that 

 of a pea to a hazel nut and of a 

 tough consistency. On section 

 they appear sometimes to be firm, 

 homogeneous and fibrous ; some- 

 times softened in the center, 

 often infiltrated with calcareous 

 salts. The peritoneum and the 



Digitized by IVIicroson® 



44. Tuberculous 

 from a pig. 



spleen 



