104 ESSENTIALS OF BACTERIOLOGY 



The earth of special districts seems to contain the bacilli in 

 greater quantities. 



Spores of tetanus may gain access to animal sera, and 

 if not properly destroyed, may produce tetanus during the 

 use of these products. Previous testing for the tetanus bacil- 

 lus should be made in the manufacture of all animal vac- 

 cines, antitoxins, etc. 



Bacillus (Edematis Maligni (Koch, 1881) ; Vibrion 

 Septique (Pasteur, 1875). Synonym. Bacillus (Edematis. 



Fig. 92. Bacillus of malignant edema, from the body-juice of a guinea- 

 pig inoculated with garden-earth (X 1000) (Frankel and Pfeiffer). 



Origin. In garden-earth, found also in severe wounds in 

 man when gangrene with edema had developed. Identical 

 with the bacillus found in Pasteur's septicemia. 



Form. Rods somewhat smaller than the anthrax bacillus, 

 the ends rounded very sharply. Long threads are formed. 

 Very large spores which cause the rods to become spindle 

 shaped. Resembles in form and culture B. chauvei (Fig. 92). 



