XI] BACILLI : SPECIFICALLY PATHO(;£NlC 213 



of fowl cholera. Pigeons are unsusceptible, rabbits only 

 very slightly susceptible. By feeding of fowls with the con- 

 tents of the intestine the disease can be reproduced ; by 

 subcutaneous inoculation the disease can be produced, both 

 with the blood or spleen tissue of a fowl dead of the disease 

 as also by artificial cultures of the microbe. In all cases 



Fig, 70. — FiLHi Si'ECImen of Blood of Fowl dead of Fowl Enteritis, 



SHOWING BlOOU CokI'L'SCLES AND ONE IJACILLUS OF FoWL FnTERIITS. 



the animals do not show any illness till the third or fourth 

 day (this is also an important distinction from fowl cholera), 

 or more generally till the fifth day : they suffer then from 

 diarrhcea and are quiet ; on the sixth or se\'enth day most 

 of them arc found dead, rarely do they survive till the eighth 



