Epizootic Laryngo-tracheitis of Horses. 43 



The best results are to be expected in chronic laryngitis 

 from painting the mucosa of the larynx or from the insufflation 

 of powders, in cases in which the animals do not get too much 

 excited during such manipulations. Indicated are: acidum 

 tannicum or alum, argentum nitricum and saccharum album 

 aa; cocaine, eucain, orthoform (of each 0.01 gm. with 0.2-0.3 

 sugar). The painting is best done with a 5% solution of argen- 

 tum nitricum. 



The powder is applied to smaller animals either with a long and properly 

 curved brush or with a feather or by the aid of a Rauchfuss powder-blower. 

 Painting may be done with a brush or with a sponge fastened to a small rod. The 

 applications must be repeated daily. 



In larger animals one may use a Friek or a Bayer spraying apparatus, and 

 powder may be applied with a Neubarth powder-blower. 



Intratracheal injection (Dieckerhoff) may be performed in 

 larger, as well as in smaller, animals. Larger animals receive 

 30 to 40 cc. ; smaller animals 4 to 5 cc. of fluid, which is rapidly 

 injected with a needle immediately behind the larynx in a 

 direction toward the pharynx. The following solutions are 

 used: 0.5% solutions of alum, tannic acid or sulphate of zinc; 

 0.3% solution of acetate of lead; 0.1% solution of argentum 

 nitricum; in large animals if the cough is very tormenting 

 morph. mur. is indicated in a 1% solution (10-20 or 0.5 to 



Intratracheal injections are generally looked upon as without danger, but 

 they may usually be dispensed with. In dogs with a short and thick neck this 

 otherwise simple oi>eration requires great dexterity. The inflammatory swelling 

 which sometimes forms at the site of the injection must be treated with cold 

 applications. In larger animals the injection may be performed with a Hauptner 

 syringe or with a trochar; in smaller animals with an ordinary Pravaz syringe. 



If the laryngitis is contagious in character, isolation of 

 the healthy, or at least, of the sick animals, and disinfection 

 of the stable or barn is indicated. 



Literature. Dieckerhoff, W. f. Tk., 1886, 15; B. t. W., 1889, 187.— Freund, 

 B. t. W., 1907, 57.5. — Poschel, Ueb. d. Anw. d. Inhalation, Inaug. Diss., 1905 (Lit. 

 on Inhalation). 



Epizootic Laryngo-tracheitis of Horses, A usually very contagious 

 catarrh of the respiratory passages of horses has been known since 

 1888. It usually affects the mucosa of the larynx and trachea; at 

 other times that of the bronchi, or again that of the respiratory parts 

 situated anteriorly to the larynx. According to its variable location 

 the affection is known as infectious laryngitis, infectious enzootic catarrh 

 of the upper respiratory passages, enzootic cough, laryngo-tracheite 

 epizootique (French), bronchite infectieuse, also frequently "la grippe." 

 To this group probably also belongs the contagious pharyngitis of 

 Dieckerhoff. According to Meyer "Skalma" (Dieckerhoff) is also a 

 bronchial complication of this affection. Meyer claims quite properly 

 that all these affections are only varieties of one and the same etiologic 

 entity. 



