REPORT ON DOURINE. 



eruption of plaques is more or less localized to some particular 

 region, so that one may describe it as a neck or abdominal case- 

 For instance, out of 41 plaques observed on Kilngarth, 30 appeared 

 on the right and left sides of the neck and crest. Again, there may 

 be an equal distribution of plaques on each side of the body as in 

 mare No. IV or one side may present more than the other. Of 440 

 cutaneous plaques which made their appearance on 13 equines 

 (mares and stallions), the distribution with regard to the side of the 

 body implicated was as follows : 



Right side 255 or 57'95 % 

 Left tide 185 or 42*05 % 

 With regard to the question of sex we find of 206 plaques in 



stallions : 



Eight side 111 or 63'88 % 

 Left side 95 or 4612 % 



Of 234 plaques in mares ? 



Eight side 144 or 61'54 % 

 Left side 90 or 38'46 % 



In the human subject urticaria may invade the mucous- 

 membrane of the tongue and some part, if! not all, of the gastro- 

 intestinal tract, but in equines no symptom of such complication 

 has been observed, unless the slight but repeated attacks of colic 

 may point to the existence of such a condition. 



In many instances in the course of this disease, the formation of 

 a plaque does not take place suddenly. A faint outline is first 

 observed, giving an indication as to the size the plaque will assume, 

 later one side only may become raised at the circumference or outer 

 border, while the hair covering the implicated skin may stand 

 erect. Probably in the course of several hours the plaque may 

 become fully developed; but as the majority of plaques make their 

 appearance and mature during the hours of the night, one usually 

 observes the well-formed plaque only at the time of the morning 

 visit. 



(V) Plaques. -The plaques at the time of eruption and during 

 the period of their persistence may assume a variety of forms of 

 which the following are the most frequent : 

 (i) Shape. Circular flat like a disc of metal. 



(ii) Circular or oval, meniscus form. 



(iii) Circular or oval, with a slight depression in the centre. 



