CANADIAN HOESE AND HIS DISEASES. 157 



as neglected or improperly treated strangles, influenza, 

 diabetes, &c., injuries and exposure to cold in certain states 

 of the system may give rise to the development of the virus 

 in the blood. From whatever cause it .arises, it becomes 

 very contagious, and apt to spread in a stable ; not only horses 

 are subject to it, but the mule and ass are not exempt, and 

 numerous cases are recorded of students and attendants 

 having been inoculated in working about them, and died 

 from this horrible malady. , 



Symptoms. — The distinctive appearances which glanders 

 present may be slow in their development, and may con- 

 tinue for years, during which he may feed and work well, 

 constituting chronic glanders ; or they may run on rapidly, 

 and in two or three weeks are well marked and soon run on 

 to a fatal termination, when it is called acute glanders. 



The coat is rough and staring ; he is usually hide-bound ; 

 the belly drawn up, and constitutional disturbance exists, the 

 pulse being easily excited ; the membrane lining the nostrils 

 is of a leaden hue ; the glands under the jaw are enlarged, 

 especially pn the side from which the discharge takes place — 

 usually the right, sometimes the left, or even from both ; the 

 discharge is clear and watery at first, becoming thicker and 

 sticky, accumulating round the nostril ; cough may be pre- 

 sent, but it is not an invariable symptom. As it advances, 

 the discharge increases, becomes purulent, of a greenish 

 colour, sometimes mixed with st reaks o f blood Jit is of a 

 heavy specific grav ity, and if d ropped into wat gjivsinks to thd 

 bottofli /^it has a very ofi'ensTve smell ; t he gland on the 

 affected side becomes hard and adherent to the side of the 

 jaw ; ulcera ting tub ercle s form on the nostril^_which have a 

 mouse^eaten appearance, being raised and irregxilar at the 

 edgesTand j^ epressed in the centre ; they run into patches 

 and spread over the whole nasal septum ; weakness and 



