50 JOHNE^S DISEASE 



ture for post-mortem examination are described as 



follows : 



**The lungs and heart were normal; the liver 

 was fatty; the kidneys were normal, the rumen^ 

 reticulum, and the omasum were also normal ; but 

 the abomasum showed a few small areas of con- 

 gestion. The small intestine was thickened, and 

 showed numerous small haemorrhages under the 

 mucous membrane. The surface of the mucous 

 membrane was coated with a white creamy mucus,, 

 but it showed no corrugations similar to those 

 found in Johne's disease in cattle. The large 

 intestine showed zebra markings and a few small 

 haemorrhages under the mucous coat. 



^^Microscopical Examination. — Scrapings from 

 the mucous surface of the small intestine showed 

 enormous numbers of acid-fast bacilli, mostly 

 arranged in dense clumps, and indistinguishable 

 from those found in Johne's disease of cattle. 

 Scrapings from the large intestine also showed 

 a considerable number of the same bacilli, but the 

 microbes were much fewer than in preparations 

 made from the small intestine. The same bacillf 

 were also found in considerable numbers in smears 

 made from the mesenteric lymphatic glands. Sec- 

 tions of the small intestines, made after embedding 

 in paraffin, showed a colossal number of acid-fast 

 bacilli. These were present as single elements 

 and as dense clumps. They were most numerous^ 

 towards the surface of the mucous membrane, but 

 were also present in considerable numbers in 

 the deepest part of the glandular layer. Micro- 

 scopical sections of the mesenteric glands also 

 showed numbers of bacilli, and nothing resembling 

 a tuberculous formation could be seen. 



