PREVENTION, SYMPTOMS AND TREATMENT I53 



chlorid., 3ii; syr. scillae, §i; spts. aether, nitrosi, gi; syr. tolu, gi; 

 elix. simplic. ad giv. misce. Sig. teas, thrice daily. 



Edema of the Glottis may be caused by acute laryngitis 

 (with noisy and difficult breathing, cyanosis, coughing, sweating, 

 protruding eyeballs, etc.), and will probably prove rapidly fatal 

 unless tracheotomy is done. 



Chronic Laryngitis. — Occurs chiefly in horses and dogs in 

 spring and fall, although all animals are liable. Characterized by 

 a chronic, dry cough. There are fits of coughing during which the 

 dog chokes and vomits, especially at night. In horses, the head 

 is outstretched and cough is accompanied with some dyspnea. 

 The Larynx is very sensitive to pressure. Between attacks the gen- 

 eral condition is good. The disease is very persistent. 



Treatment is chiefly local. Wet compresses with waterproof 

 covering may be used about the throat, or counter-irritation with 

 stimulating liniment (sweet oil and turpentine, equal parts), or 

 antiphlogistine. 



In dogs, local applications to the laryngeal mucous membrane 

 of a two per cent, solution of zinc chloride or silver nitrate, once 

 daily, may be made with cotton on a human laryngeal applicator, 

 and are most effective. Inhalation of co. tine, of benzoin and vin. 

 ipecac (each gss to i quart of water) is useful. Also insufflation 

 of bismuth and orthoform, equal parts, may be made with a pow- 

 der-blower. The direct application to the larynx is most difficult 

 and most effective. 



In the horse, injections into the larynx through the crico- 

 tracheal ligament with a curved hollow needle have yielded the 

 best results. One-half per cent, solutions of lead acetate or alum are 

 used. Keeping the bowels active is of much importance. One 

 dram of ammonium chloride with an ounce or so of Carlsbad salts 

 may be sprinkled on the feed three times daily, in the case of the 

 larger animals. 



Membranous Laryngitis (Laryngeal Croup, Diphtheretic 



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