VACCINES : DIAGNOSTIC AND CURATIVE 115 



Jerseys of various ages gave the following re- 

 actions : 



These cases were not confirmed by post-mortem 

 examination, but were sent away at once from the 

 farm. In the twelve months following the injections 

 no other cases of Johne's disease occurred. 



Two suspected cases on farms on which there was 

 no history of Johne's disease were classed as negative 

 from the following results : 



Both these cases had been affected for some months 

 with profuse diarrhoea, but on post-mortem examina- 

 tion they showed no characteristic corrugations as 

 seen in Johne's disease, though the small intestines 

 in both cases were inflamed and somewhat thickened : 

 no acid-fast bacilli could be found in either case. Both 



