130 BOVINE PATHOLOGY. 



but some cases of rallying have been recorded. How- 

 ever, animals suffering from these conditions are unsafe 

 to use either for breeding, milking, or for human food; 

 besides, they never become fat properly. The expense 

 and constant trouble of keeping them is not such as will 

 be atoned for by subsequent value of the animal. In 

 arthritic cases, which occur in young stock, treatment is 

 not satisfactory. Some of the patients recover, but 

 the scrofulous tendency hangs about them, and they 

 do not do well. Very frequently the suppuration against 

 the joints wears out the patient. Stimulating applications 

 locally applied are beneficial as promoting nature^s efforts 

 to throw off tbe tuberculous matter in abscess. Tonic 

 agents must be administered, and deobstruents, especially 

 the compounds of iodine and bromine. V/hen the ab- 

 scesses have formed we shall have to resort to stimulant 

 injections to promote granulation. Scrofulous tumours 

 must be treated much in the same way. Generally 

 external manifestations of the disorder are but accom- 

 paniments of internal changes. 



In speaking of the lesions of phthisis, we have al- 

 luded to the scrofulous ulcer of mucous membranes. 

 It occurs not infrequently in the larynx (tubercular 

 laryngitis), and animals fed with, tuberculous matter 

 almost always exhibit lesions of this nature throughout 

 the length of the alimentary canal. Green tells us that 

 the development of tuberculous nodules in these ulcers is 

 secondary to a hyperplasia of the lymphoid tissue of the 

 mucous membranes, which leads to formation of an ulcer, 

 with thick and prominent margins, in the bottom of 

 which the nodules appear. In the intestine these changes 

 have their seat especially in the solitary Peyer's glands, 

 which also are affected in typhoid fever. The tubercular 

 differs from the typhoid ulcer in that ^^ its edges and base 

 are thickened and indurated. And the tuberculous 

 nodules, tending to become caseous, are seen scattered over 

 its floor.^^ The nodules develope around the blood-vessels. 

 It seems these changes of the mucous membrane are brought 

 about by actual contact with diseased matter (Gerlach). 



