DOMESTIC ANIMALS. 101 



The growth of the germs of glanders is very slow when 

 compared with many others, but they are extremely tena- 

 cious of life. 



Symptoms The germs having gained access to the 

 body, they usually cause small tubercles to be formed 

 in the lungs and air-passages. 



When these tubercles break down there will be a dis- 

 charge of pus and mucus from the nostrils. The first 

 thing noticed usually is that there is a slight discharge 

 from one nostril with a swelling under the lower jaw 

 about the size of a walnut, rather loosely connected, 

 and not very tender to the touch. This may continue 

 about the same size for a long time, and as there are no 

 constitutional symptoms, no dangerous disease is sus- 

 pected. These are the really dangerous cases and the 

 ones from which nine-tenths of the cases are propa- 

 gated. The owner will usually say the horse has had 

 distemper and hasn't got rid of it yet : that he eats all 

 right and works well, in fact that there is virtually 

 nothing the matter with his horse. I have known 

 horses to keep fat and work well for a year or two with 

 glanders in this mild and evidently local form. Always 

 beware of a horse that has a movable swelling under 

 the jaw and a discharge from the nostril on the corres- 

 ponding side. After a while the disease assumes a 

 more severe form ; there is a discharge from both nos- 

 trils ; the horse gets thin, cannot work with comfort 

 any more, and we will be liable to notice ulcers on the 

 mucus membrane of the nostrils which makes the 

 diagnosis certain. Swellings may now appear on the 

 surface of the body, which soon break and discharge 

 pus and the resulting sores refuse to heal. In a short 

 time the animal will die. 



