523 



At tlie end of from three and a lialf to four days tlie eruption breaks 

 out, the fever abates, and the general symptoms improve. The eruj)- 

 tion in severe cases may be generalized ; it may be confined to the 

 softer skin of the nose and lips, the genital organs, and tlie inside of 

 the thighs, or it maj- be localized in the neighborhood of a wound or 

 in the irritated skin of a pair of greasy heels. It consists of a greater 

 or less number of little nodes which, on a mucous membrane, as in the 

 nostrils or vagina, or on soft unpigmented skin, appear red and feel 

 at first like shot under the epidermis. These nodes soften and show 

 a yellowish spot in the center when they become pustules. The epi- 

 dermis is dissoh^ed and the matter escapes as a viscid fluid at first 

 citrine and later cloudy and purulent, which dries rapidly, forming 

 scabs; if these fall off or are removed they leave a little shallow con- 

 cave ulcer which heals in the course of five or six days. In the softer 

 skin if i^igmented the cicatrices are white and frequentlj' 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 aninuit has 

 been affected with the horsepox. 



At times the pustules may become confluent and x)roduce large 

 superficial 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 secondary fever lasting for a day or two. 



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 produce difficulty in breathing. 



Complication^. — A case of horsepox maybe 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, 

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

 the nose causes severe corj-za with purulent discharge. 



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

 lungs, developing an acute laryngitis or bronchitis. These commence 

 with a harsh cough, wliich becomes moister and more fatty as the dis- 

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

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

 causing the animal to roar and discharge quantities of foamy mucus 

 and matter from tlie nostrils, as in troubles of the same organ from 



