538 DISEASES OF THE HORSE. 



In severe cases there may be a suppurative adenitis, or inflamma- 

 tion of the lymphatic glands which are fed from the affected part. 

 If the eruption is around the nostrils and lips, the glands between 

 the jaws (submaxillary) form abscesses as in a case of strangles; if 

 the eruption is in a pair of greasy heels abscesses may form in the 

 fold of the groin (inguinal). There may be so much tumefaction of 

 the nostrils as to v)roduce difficulty in breathing. 



CovipUcations. — A case of horsepox may be attended with various 

 complications of varying degrees of impoi*tance. Adenitis, or sup- 

 puration of the glands, has just been mentioned. Confluent erup- 

 tions irritate the part and induce the animal to rub the inflamed part 

 against the manger or scratch it in other ways and thus produce 

 troublesome ulcers, vrhich may leave ugly scars. Irritation of the 

 mucous membra me of the nose causes severe coryza with purulent 

 discharge. 



The eruption may occur in the throat or in the air tubes to the 

 lungs, developing an acute larjngitis or bronchitis. If the animal is 

 exposed to cold, or worked so as to engorge the lungs with blood at 

 the termination of the specific fever, just when the eruption is about 

 to localize, it may be determined to the lungs. In this case we have 

 a short, drj^ cough, labored breathing, the development of a secondary 

 fever of some gravity, and all the external symptoms of a pneu- 

 monia. This pneumonia differs, however, from an ordinary pneu- 

 monia in the symptoms furnished by the examination of the lungs 

 themselves. In place of a large mass of the lung tissue being affected 

 the inflammation is disseminated in smaller spots over the entire 

 lung. 



Diagnosis. — The diagnosis of horsepox is to be based on the pres- 

 ence of a continuous fever, with rosj^ mucous membranes, for several 

 days and the appearance of the characteristic eruption. If the 

 eruption is in the nasal cavities, marked by a considerable discharge 

 and attended with submaxillary abscesses, it may be confounded with 

 strangles. If the throat is affected, it may be confounded with an 

 angina (laryngitis or pharyngitis), but in the latter the local trouble 

 precedes or is concomitant with the fever, while in the former the 

 fever precedes the local trouble by several days. Yariola may be 

 confounded with bronchitis or pneumonia if complicated with these 

 troubles and the eruption is absent from the exterior, but it is of little 

 moment, as the treatment for both is much the same, ^^lien the 

 eruption is in the neighborhood of the genital organs the disease has 

 been mistaken for dourine. In variola the eruption is a tempo- 

 rary one; the nodes and pustules are followed by shallow ulcers 

 and rapid cicatrization unless continued in the vagina or on the penis 

 by the rubbing of the walls and filth which accumulates; there are 

 apt to be pustules at other parts of the body. In the venereal dis- 



