SPECIAL BACTERIOLOGY 
147 
Gram-negative, is motile, has flagella, has no capsules or 
spores. 
III. Cultural Characteristics 
The cultural characteristics are the same as those of 
the colon bacillus except as regards some sugars and 
milk, as shown in the following table: 
Table of Reactions on Sugar Media and Milk 
by the Various Members of the Typhoid-Colon- 
Dysentery Group 
NAME OF 
BACTERIUM 
cc 
< 
o 
$8 5 
O W 
« ft.. 
££ 
U o 1 
Q ^ 
fa 
< 
G 
W ^ 
$ * 
S t 
p p 
> fa 
U fa 
ALACTOSE 
MANN1TE 
MALTOSE 
( MALT SUGAR) 
< 
o 
U 1/3 
C/3 v 
gg 
•J w 1 
SACCHAROSE 
(cane sugar) 
MILK 
B. Fecalis 
Alcaligenes 
— 
_1 
_ 
_ 
1 _ j 
_ 
__ 
Ino 
coagulation 
B. Dysenteriae 
(Shiga type) 
A 
A A 
_ 
1 
_ 
_ 
No 
coagulation 
B. Dysenteriae 
(“Y” type) 
A A A A 
J- 
No 
coagulation 
B. Dysenteriae 
(Flexner type) 
A A A A 
A 
— 
A 
No 
coagulation 
B. Typhosus 
AAA 
A 
A 
— 
— 
No 
coagulation 
B. Para- 
typhosus 
AG AG i 
AG 
AG 
AG 
— 
— 
No 
coagulation 
B. Coli 
Communis 
AG 
AG 
AG 
AG 
AG 
AG 
_ 
Coagulation 
takes place 
B. Coli 
Communior 
AG 
AG 
AG 
AG AG 
AG 
AG ! 
Coagulation 
takes place 
(After Hiss and Zinsser.) 
A=Fermentation with acid production, A G=Fermentation with 
both acid and gas production, - means no fermentation. 
IV. Destruction 
Bacillus typhosus is an aerobe and a facultative anae¬ 
robe; grows between 15° C. and 42° C., but, like the rest 
of bacteria, grows best at 37° C. Heating for ten min- 
