SPECIAL fcACTEftlOLOGY 
165 
pecially where there is well manured soil. Spores have 
been repeatedly found on the uniforms of soldiers. 
A new ray of hope is offered by the brilliant work of 
our own bacteriologist, Bull, of the Rockefeller Institute, 
who has succeeded in preparing an antitoxin (the organ¬ 
ism producing an exotoxin) which has proved highly 
successful in animal experimentation, and which Bull 
is now trying out on patients on the battle fields. 
Bacillus of Malignant Edema 
The bacillus of malignant edema was discovered by 
Pasteur in 1877. 
This is a slender long rod, motile, with numerous 
flagella, has spores, and is Gram-negative. It is a strict 
anaerobe, grows readily on simple media. It produces 
acute inflammation and (edema) swelling which ex¬ 
tends deeply into the tissues, and is very dangerous. 
