REPORT ON D:JURINB. 35 



the skin of the affected area. This is a somewhat rare 



form of plaque in India, 

 (ii) (Edematous patches, circular, oval or irregular in outline, 



meniscus form, 

 (iii) (Edematous patch, oval or circular in shape, pitted in the 



centre, which may later fill up and assume the oedc- 



matous form as No. (ii). 

 (iv) 1-arge, circular or oval in form, with a flat area in the 



centre, which does not appear to be involved in the 



pathological change. 



The hair covering such patches may be raised, while in others 

 there may be only slight unevenness noticeable. Plaques vary 

 considerably as to the periods of their persistency, some disappear- 

 ing after twenty-four hours or less, while others may undergo 

 variations in dimensions and remain well marked for 60 days or 

 longer, especially those plaques which invade the region of the neck 

 of the affected animal. The plaques appear but once as a general 

 rule, but in a certain number of cases reappear on the same spot 

 and frequently present a similar outline to that exhibited ou the 

 first occasion. After disappearing a second time a small percen- 

 tage may again, after a short interval, make themselves manifest 

 for a third time, whilst at a much later date an entirely fresh 

 plaque may appear invading the same or a much larger cutaneous 

 area. 



2. Disseminated urticaria. This is the small circular or oval 

 form of eruption well raised, and either discrete or confluent, affecting 

 the skin of the body generally or only one particular region at a time. 

 It is fugitive in character and mlistmguishable from the urticarial 

 eruption observed in equines the subjects of Surra. 



3. A vesicular but discrete eruption dotted over the surface 

 of the body, which persists for several days and which liberates a 

 glairy material, something like white of egg. The hairs in close 

 proximity become soiled and matted together. At a later date 

 frequently, a small bare patch marks the affected area previously 

 involved. 



The period of the disease during which the eruption of plaqv.es 

 place has been found to differ in this country according to 



P3 



