DISEASES OF FARM ANIMALS I7I 



and if the temperature were taken it might be 

 slightly above normal, say, loi degrees to loij^, 

 the normal temperature being loo degrees. Yet 

 such an animal might do its work, last for a long 

 time and not be suspected as a source of danger 

 until several cases had occurred in the stable, for 

 which it was difficult to account. 



While a well-marked case of glanders or of farcy 

 is not difficult of diagnosis, there are many obscure 

 cases which escape detection for some time. If a 

 horse has a well-marked discharge from bne or both 

 nostrils, with characteristic chancres visible upon 

 the mucous membrane of the septum nasi, and hard 

 enlarged submaxillary glands in the intermaxillary 

 space, it is not a difficult matter to diagnose such 

 a case, and any horseman ought to recognize it. 

 The same is true of a well-marked case of farcy. 

 When the lymphatic vessels on the inside of a leg, 

 especially a hind leg, are swelled and corded, with 

 a chain of farcy buds along their course, some of 

 which have gathered and broken, leaving a dis- 

 charging open ulcer in the skin, it is quite evident 

 that the animal is suffering from farcy. 



A peculiarity of glanders seems to be a tendency 

 for the symptoms to appear on the left side; in 

 many cases of glanders the discharge and ulcera- 

 tion is in the left nostril, and the left submaxillary 

 gland is enlarged ; and in a large number of the cases 

 of farcy met with it is the left hind leg that shows 

 the lesions of the disease. In obscure cases of 

 glanders or farcy the diagnosis is not always so 

 easy, even for experts, and then other methods for 

 determining the trouble have to be resorted to. 

 These are the guinea pig test and the mallein test. 

 The guinea pig test consists of inoculating one or 

 two of these little animals with the discharge from 



