IN SUSCEPTIBLE ANIMALS. 501 
cubating oven a rather thin, transparent, grayish-white or yellowish, 
waxy eee is developed in the course of a few days. According to 
Bunzl-Federn, the bacillus of fowl cholera and that 
of rabbit septicemia grow upon potato, while the 
bacillus of Wildseuche, Schweineseuche, and Biif- 
felseuche do not. According to 
Caneva, none of the bacilli of this 
group grow upon potato. The 
same author states thatthe growth 
in milk is scanty and does not 
produce coagulation, while Bunzl- 
Federn finds that the bacillus of 
fowl cholera and of rabbit septi- 
cemia produce coagulation and 
the others do not. These differ- 
ences are not, however, consid- 
ered by the author last named as 
sufficient to establish the specific 
difference of the bacilli from these 
different sources. He looks upon 
them rather as varieties of the 
same species. Bunzl-Federn has 
also ascertained that when cul- 
tivated in a peptone solution all 
of the bacilli of this group, with 
Fig. 128, — Bacflius 
septiceemize hemor- 
rhagice; stick culture 
in nutrient gelatin, 
end of four days at 16°- 
18°C. (Baumgarten ) 
Fie. 129,—Bacillus 
of Schweineseuche ; 
old stick culture 
in nutrient gela- 
tin. (Schitz,) 
the exception of that obtained 
from the so-called Biiffelseuche; 
give the reaction for phenol and 
for indol—the bacillus of Biiffel- 
seuche gives the indol reactiononly. Development in bouillon is rapid 
and causes a uniform turbidity of the fluid. Cultures of this bacillus 
may retain their vitality for three months or 
more when kept in a moist condition; but 
the bacillus usually fails to grow after having 
been kept for a few days in a desiccated con- 
dition ; according to Hueppe, it may resist 
desiccation for fourteen days. The thermal 
death-point, as determined by Salmon for 
the bacillus of fowl cholera, is 56° C., the time 
of exposure being ten minutes (55° C. with 
fifteen minutes’ exposure—Baumgarten). It 
isnotreadily destroyed by putrefaction (Kitt). 
A solution of mercuric chloride of 1 :5,000 
destroys it in one minute, and a three-per-cent solution of varbolic 
Fic. 130.— Bacillus of swine 
plague; colonies on gelatin 
plate, end of scvea days, 
x 60. (Snuith.) 
