558 
THE ANAEROBIC BACTERIA 
PLECTRIDIAL ANAEROBES. 
' B. cochlearius.' 
B. pseudotetanus.2 
B. putrificus.' 
B. paraputrificus.* 
Morphology . 
Slender rod 
isiender rod 
Slender rod 
Slender rod. 
Size. . . . 
Same as tetanus 
ISame as tetanus 
0.6-0.8 X 5-6 
Same as putrificus. 
Motility . . 
Active 
1 Active 
Active 
Active. 
Occurrence 
Single and in pairs 
Single and in pairs 
Single and in pairs 
rarely in short 
chains 
Single and in pairs; 
rarely in chains. 
Capsule 
Not demonstrated 
Not demonstrated 
Not demonstrated 
Not demonstrated. 
Spore . 
Terminal, oval or 
Terminal ; spheri- 
Terminal, oval or 
Terminal, oval or 
spherical 
cal 
spherical 
spherical. 
Stain . . . 
Gram -\-\ readily 
becomes Gram — 
Gram + may and 
become Gram - 
Gram-|- 
Gram -|-. 
Isolation and 
culture . 
Obligate anaerobe 
Obligate anaerobe; 
Obligate anaerobe 
Obligate anaerobe 
colonies delicate, 
colonies delicate, 
colonies delicate. 
colonies delicate, 
round, transpar- 
round, transpar- 
round, transpar- 
round, transpar- 
ent 
ent 
ent 
ent. 
Meat medium . 
Very little change 
Pink color; some 
Meat digested and 
Gas, then diges- 
gas 
discolored 
tion. 
Gelatin. . . 
No liquefaction 
No liquefaction 
Liquefied 
Liquefied. 
MUk . . . 
No visible change 
No visible change 
Peptonized 
Coagulated, not 
peptonized. 
Fermentation . 
No sugars fer- 
Glucose and mal- 
Glucose, maltose; 
Glucose, lactose, 
mented 
tose; acid and 
glycerin =«= ; acid 
acid and gas, pos- 
gas 
and gas 
sibly other sugars 
Products of 
growth . . 
Not known 
Not known 
Aromatic amines, 
amino-acids; bu- 
tyric acid from 
protein 
Not known. 
Soluble proteo- 
lytic enzyme 
None 
None 
Present 
Present. 
Soluble toxin . 
None 
None 
None 
None. 
Pathogenesis, 
laboratory 
animals . 
None 
None 
None 
None. 
Specific agglu- 
tinins 
In rabbits 
In rabbits 
In rabbits 
In rabbits. 
1 Type 3C of Mcintosh and Fildes (Medical Research Committee, Special Report 
Series No. 12, 1917; B. cochlearius. Medical Research Committee, Special Report Series 
No. .39, 1919). 
2 Ibid., Special Report No. 12, Type IX; B. tetanomorphous, Special Report Series 
No. .39, 1919. 
" Bienstock: Arch. f. Hyg., 1899, 36, .335; 1901, 39, 390. 
* Bienstock: Ann. Inst. Pasteur, 1906, 20, 417. 
BACILLUS CHAUVEL 
Sjoionyms. B. anthracis symptomatici, B. sarcophysematis bovis, 
B. of Raiischbrand, B. of Charbon Symptomatiqiie. 
Historical.— The disease variously known as Black Leg, Quarter-evil, 
Symptomatic anthrax, or Rauschbrand, is a disease chiefly of cattle. 
It is found less commonly in goats and sheep; possibly hogs may be 
infected but it is at least a ver^• uncommon disease in them. The 
