478 Veterinary Medicine. 



ing a sudden eruption after spiced food, meat diet, putrid meat, or 

 an entire change of aliment. The occasion may have been violent 

 exertion, the irritation of vermin on the skin, or the presence of 

 the deleterious products of other diseases. Schindelka quotes a 

 general urticaria in connection with oldstanding mange ; and a 

 second which invaded the ears uniformly, and more sparingly 

 the head and neck in connection with a condyloma and catarrh 

 of the vagina. The sudden eruption, the great thickening of 

 the skin without vesication, the speedy subsidence and the reap- 

 pearance in many cases, further ally it directly with urticaria in 

 the horse. The dog shows considerable pruritus and by licking 

 and scratching, the scurf skin is often removed leaving red bare 

 patches. 



Symptoms. Swine. In connection with a sudden change of 

 diet, or with offensive fermented food, with inappetence, 

 diarrhoea or constipation and sometimes vomiting and slight 

 hyperthermia, the eruption takes place in a few hours. It 

 shows on the back, sides, and lower surface of the body, on the 

 shoulders, arms or thighs. The individual nodules may be one- 

 third to an inch in diameter, or by confluence they form exten- 

 sive patches or bosses, having it may be a white centre with a 

 pink or violet periphery, or black hsemorrhagic spots. They 

 may disappear suddenly or they may transude serum and form 

 scabs, which falling leave a deep red surface. 



General and Intestinal Symptoms. In the different genera 

 hyperthermia keeps pace with the extent of the eruption. In mild 

 cases it is usually absent, while in severe, general urticaria the 

 temperature may rise i° or 2" or more. Derangements of the 

 digestive organs are common as may be inferred from the frequent 

 presence of unwholesome or indigestible food as an etiological 

 factor. In the horse, ox, or dog there may be impaired appetite, 

 abdominal distension or rumbling, slight icterus, intestinal 

 catarrh, diarrhoea or costiveness. The nodules all end by an abrupt 

 margin, without gradual shading into the healthy skin as in 

 other inflammations. 



Diagnosis. Prom farcy this is to be distinguished by the 

 suddenness pf the eruption, by its tendency to bilateral symmetry, 

 by the absence of any disposition to follow the lines of the lym- 

 phatics, or to soften, producing abscesses or ichorous sores, and 

 finaHy by its disposition to an early and complete recovery. 



