2 JOHNE'S DISEASE 



claim to be called " Bang's disease," and its causal micro- 

 organism "Johne's bacillus." 



An objection to the term " pseudo-tuberculous 

 enteritis " exists in the fact that there is never any 

 resemblance between the macroscopic lesions of 

 Johne's disease and those of tuberculosis, though 

 under the microscope it is rarely possible to differen- 

 tiate the causal micro-organisms. However, though 

 for more than ten years after the discovery of acid- 

 fast bacilli in the lesions the disease was regarded as 

 a form of tuberculosis, and although the thickening of 

 the bowel had been noticed by other observers previous 

 to Johne and Frothingham, yet the name "Johne's 

 disease" has been adopted in England, and nothing 

 would be gained by attempting to alter it. In America 

 it is known as " chronic bacterial dysentery," to which 

 it may be objected that the passage of blood with 

 the faeces is not a very common feature of the 

 disease. 



The popular terms for this disease are somewhat 

 varied, and differ in different localities — " skinters," 

 "scanters," "piners," and "wasters," are all terms 

 applied to animals showing emaciation and diarrhoea. 

 Possibly the term "waster " is more commonly applied 

 to tubercular animals, in which the diarrhoea is less 

 marked ; but no reliance can be placed on the use 

 of these terms by farmers. 



"Scrapy" seems to be a term somewhat loosely 

 applied to the disease when it affects sheep. Stockman 

 mentions this term in his various articles on the sub- 

 ject, but states that it may be the irritable skin condi- 

 tion to which reference is made under this name, and 

 which in sheep seems to be associated in some cases, 

 with bacterial enteritis. 



" LoUandske Syge," or Laaland disease, is the old 



