XL] 



BACILLUS : PATHOGENIC FORMS. 



173 



groups of thickish, short bacilli, thicker and shorter than 

 tubercle-bacilli. These bacilli are either placed singly or in 

 chains of two. 



Subcutaneous inoculation of or feeding with human and bovine 

 tubercular (caseous) matter of guinea-pigs and rabbits produces general 

 tuberculosis, but there are certain differences both as regards the 

 anatomical lesions as well as duration whiclj show that the two diseases 



FIG. 95. PLATE CULTIVATIONS IN NUTRITIVE GELATINE, AFTER THREE DAYS' 

 GROWTH AT 20 C , SEEN WITH THE UNAIDED EYE. 



1. A colony of microccus. 



2, 3, 4. Colonies of cholera comma-bacilli. 

 The clear part is due to liquefaction of the gelatine. 



are not quite identical. While rabbits are extremely susceptible to 

 bovine tuberculosis, in consequence of inoculation or feeding, and while 

 they develop rapidly a general tuberculosis, they are less susceptible to 

 human tuberculosis, the disease taking a slower course and involving 

 fewer organs, and these to a lesser degree. 



It is well established that bovine tuberculosis is transmissible to pigs, 

 cattle, sheep, monkeys, rodents, &c., by ingestion (Johne, Deutsche 



