54 JOHNKS DISEASE 



was irregular, and was strewn with projections 

 reaching up to 2 millimetres (yV inch) in height, 

 and of very variable surface dimensions. Some- 

 times these projections took the form of well- 

 defined nodules of hemp-seed size, in other cases 

 — and these were more frequent — they took the 

 form of more or less extensive raised plates, 

 between which the mucous membrane appeared 

 smooth and comparatively normal in aspect. 

 Nodules and plates were in close proximity to 

 each other, so that the depressed areas between 

 them generally formed narrow folds. The sur- 

 faces of these nodules and plates showed losses 

 of substance, which were punctiform upon the 

 nodules but larger upon the plates, where it was 

 impossible not to recognize their ulcerous nature. 

 These ulcers were always shallow, and were 

 nearly always covered with vegetable debris, 

 which adhered to them rather closely. 



" Microscopical examination of scrapings from 

 the lymphatic glands involved, stained by Ziehl's 

 method, showed bacilli isolated or in clusters, as 

 they are found in the mesenteric glands of cattle 

 affected with Johne's disease." 



Lienaux also remarks — 



" From the anatomo-pathological point of view, 

 it is interesting to note the abundant ulcera- 

 tion in this horse. Ulceration is rare in Johne's 

 disease in cattle." 



From the description given by Lienaux, we should 

 nesitate before accepting this as an undoubted case ot 

 Johne's disease in the horse. Not only had the animal 

 definite tubercular lesions in the mesenteric glands, 

 but the lesions in the intestine appear, from the 



