CROUP. 13 



irritants should be applied over an extensive surface, em- 

 bracing the submaxillary and laryngeal regions, and the 

 course of the trachea. The animal strength is to be sup- 

 ported by stimulants. In very urgent cases the operation 

 of tracheotomy may be performed. Chlorate of potash may 

 be given, and also makes a useful gargle. The diseased 

 structures may be touched occasionally with a sponge satu- 

 rated with the following solution : argenti nitras 5i., aquae 

 distil, ^i. The sponge should be rapidly passed to the 

 diseased part, and as quickly withdrawn. A mild oleaginous 

 purge may be given to correct constipation, if present, and 

 the animals should be removed to new quarters, free from 

 dampness and other conditions opposed to recovery. Good 

 feedino; and warmth will do the rest. 



SPASM OF THE LARYNX. 



Spasm of the Larynx may occur at any age, but most 

 commonly occurs amongst old horses, and is due, I think, 

 to cerebral disturbances in a large majority of cases. 



Sijmptoms. — The attack occurs very suddenly, and without 

 giving the slightest premonition of its approach. In some 

 cases a frothy spume issues from the nostrils ; respiration is 

 very seriously interfered with, being very difficult, loud, 

 and laboured (there is no observable rise in temperature) ; 

 the animal staggers, struggles for breath, and finally falls. 

 The paroxysm shortly passes off, and he recovers, usually 

 to die at some future day of the same trouble. 



Treatment. — In this, as in all other serious affections of a 

 spasmodic character, treatment rec^uires to be prompt. 

 Hypodermic injections of morphia, inhalations of chloro- 

 form, administration of opiates, etc., are the proper means 

 to adopt. Potassium bromide is of great service in the 

 form due to cerebral disturbances. 



Ulceration of Larynx. — Ulceration of one or more of the 



