Microbic Diseases hidividually Considered. 221 



Tuherculosis. 



Tuberculosis is a disease too well known to require 

 a description of its symptoms and lesions in this 

 place. We will consider it only from the special point 

 of view of its bacteriology. 



The disease produces its greatest ravages in the hu- 

 man species, and then, with a frequency decreasing in 

 the order in which they are named, it attacks the 

 bovine species, the pig, horse, dog, and cat. Fowls 

 also are decimated by this terrible scourge. The 

 question as to the identity of human and avian tuber- 

 culosis has been much discussed and is still in dis- 

 pute. 



The distribution of the specific alterations is some- 

 what difierent in the difierent species. 



In cattle they are most frequently found in the 

 lungs, pleura, and thoracic glands, but are also com- 

 mon in the intestines, peritoneum, liver, kidneys, 

 mammae, and the corresponding lymphatic glands ; 

 they have also been met with in the meninges, inter- 

 identity. The names given in each of the lists below seem to re- 

 fer to the same disease : 



I. Rouget, in France; rothlauf, in Germany; swine erysipelas, 

 in England (cases described by McFadyean, Jour. Comp. Path., 

 Vol. IV, Part 4). 



II. Pneumo-enteritis (Klein), swine fever, in England ; svinpest 

 (Selander),.in Denmark ; hog cholera (Salmon and Smith), swine 

 plague (Billings), in America. 



III. Schweineseuche, in Germany; swine plague (Smith), in 

 America (uncertain). 



The germ of the French disease of hogs described as pneumo- 

 enteritis, as well as that of Galtier, has not been identified with 

 that of either of the diseases included under lists II and III. — D.] 



