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off or are removed they leave a little shallow concave ulcer which heals 

 in the course of five or six days. In the softer skin if pigmented the 

 cicatrices are white and frequently remain so for about a year, when 

 the pigment returns. The lips or genital organs of a colored horse, if 

 covered with a number of small white spots about the size of a pea, will 

 usually indicate that the animal has been affected with the horsepox. 



At times the pustules may become confluent and produce large super- 

 ficial serpentine ulcers on the membrane of the nostrils, around the 

 lips or eyelids, or on the borders of wounds and in greasy heels ; in 

 this case the part becomes swollen, hot, painful, and is covered with 

 a profuse discharge of matter. In this form there is frequently a sec- 

 ondary fever lasting for a day or two. 



In severe cases there may be a suppurative adenitis or inflammation 

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

 eruption is around the nostrils and lips, the glands between the jaw3 

 (submaxillary) form abscesses, as in a caseof 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 

 produce difficulty in breathing. 



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

 complications of greater or less importance. Adenitis or suppuration 

 of the glands has just been mentioned. Confluent eruptions irritate 

 the part and induce the animal to rub the inflamed part against the 

 manger or scratch it in other ways, and produce troublesome ulcers, 

 which may leave ugly scars. Irritation of the mucous membrane of the 

 nose causes severe coryza with purulent discharge. 



The eruption may occur in the throat or in the air tubesto the lungs, 

 developing an acute laryngitis or bronchitis. These commence with a 

 harsh cough, which becomes moister and more fatty as the discharge 

 increases, and is followed for several days by a fever, which is often 

 severe. If the larynx is affected it becomes inflamed and swollen, caus- 

 ing the animal to roar and discharge quantities of foamy mucous and 

 matter from the nostrils, as in troubles of the same organ from other 

 causes. 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 eruiJtion is about to localize, it may be determined to the lungs. In 

 this case we have a short dry cough, labored breathing, the develop- 

 ment of a secondary fever of some gravity, and all of the external 

 symptoms of a pneumonia. This pneumonia differs, however, from an 

 ordinary pneumonia in the symptoms furnished by the examination of 

 the lungs themselves. In place of a large mass of the lung tissue be- 

 ing affected the inflammation is disseminated in smaller spots over the 

 entire lung. The total of these areas may be equal, however, to the 

 half or more of the lungs and i^rove fatal. The crepitant rales and 

 tubular murmur of pneumonia is absent, and is replaced by sibilant 

 and small mucous rales. When the fever has been intense and the 



