286 BACTERIOLOGY. 



by bacillus tuberculosis have also from time to time 

 been observed in certain rodents. They do not appear 

 to be of specific nature as regards etiology for the reason 

 that different authors have described different species of 

 bacilli as the causative agents. The disease suggests 

 tuberculosis only by the more superficial character of its 

 lesions, for in no instance have the organisms detected 

 been in any way similar to the genuine bacillus tubercu- 

 losis. These affections pass usually under the name 

 pseudo-tuberculosis. 



