238 



BACILLI PATHOGENIC IN MAN. 



anthrax, death occurring in the case of mice after 

 about 20 hours, and in that of rabbits after 42 hours. 

 After death the bacilli are found in largest numbers in 

 the swollen spleen, and also in all the capillaries, 

 especially in the lungs, liver, kidneys, and intestine ; in 

 the larger vessels, on the other hand, often only single 

 bacilli are met with. Certain races of sheep (Algerian), 

 white rats, dogs (especially adults), and frogs, are 

 entirely, or to a certain degree, immune against anthrax. 



:; SP W ||'f.;WWS \ 



L'/lHiff I / 



Fig. 65. Anthrax, section from the liver X 700. 



Cattle are comparatively slightly susceptible to anthrax 

 after inoculation, but on the other hand readily succumb 

 to the natural infection, which generally spreads in the 

 case of sheep and cattle from the intestine as the result 

 of infection by the food. Non-spore-bearing bacilli do 

 not appear to be able to retain their vitality in the intes- 

 tine ; on the other hand, it has been shown with regard 

 to spores that they can sprout in the intestine of sheep, 



