IN SUSCEPTIBLE ANIMALS. 527 
is viscid, drawing out into threads. In the absence of oxygen the characters 
of growth are the same as in its presence. The cultures acquire an alkaline 
reaction; they are sterilized by exposure for ten minutes to a temperature of 
60° C. Does not grow upon potato. 
_ Pathogenesis.—Pathogenic for chickensand turkeys. Not pathogenic for 
pigeons, pune ries, or rabbits when injected subcutaneously or into the 
peritoneal cavity, but kills rabbits when injected into a vein. In the in- 
fected fowls the bacilli are found in small numbers in the blood, more nu- 
merous in the kidneys and liver, still more numerous in the spleen, and in 
enormous numbers in the intestinal mucus, where in acute cases it is found 
almost in a pure culture. Fowls do not contract the disease as a result of 
the ingestion of grains soiled with cultures of the bacillus, but become in- 
fected when fed with animal food to which a pure culture has been added. 
