OTHER ACID-FAST ORGANISMS 199 



it has been found that a considerable portion of lepers react to 

 tuberculin like tuberculous patients. 



Rat Leprosy. A disease occurs in rats which closely resembles 

 leprosy. The relation between the disease and that occurring 

 in human beings has not as yet been established. 



Smegma Bacillus. The organism is present in the secretions 

 of the external genitals. It has much the same appearance and 

 staining reaction as the tubercle bacillus. It is non-pathogenic. 



Bacillus of Johne's Disease or Paratubercular Dysentery of 

 Cattle. The disease is characterized by chronic diarrhea and 

 emaciation. The organisms isolated from the lesions closely re- 

 semble the tubercle bacillus. 



Timothy Grass Bacillus. Other organisms showing various 

 degrees of acid-fastness have been isolated from grass, cow manure, 

 milk, butter, etc. They have little interest apart from the fact 

 that they can only be distinguished from the tubercle bacillus by 

 animal inoculation. 



