174 



ESSENTIALS OF BACTERIOLOGY 



be used in the manufacture of all animal vaccines, antitoxins, 

 etc. 



Bacillus (Edematis Maligni (Koch, 1881) ; Vibrion 

 Septique (Pasteur, 1875). Origin. In garden-earth, found 

 also in man, in severe wounds when gangrene with edema 

 had developed. Identical with the bacillus found in Pasteur's 

 septicemia. 



Form. Rods somewhat smaller than the anthrax bacilli, the 

 ends rounded very sharply. Long threads are formed. Very 

 large spores which cause the rods to become spindle shaped. 



Fig. 106. Bacillus of malignant edema, from the body-juice of a guinea-pig 

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



Properties. Very motile; liquefy gelatin; do not produce 

 any foul gaseous products in the body. 



Growth. Grows rapidly, but only when the air is excluded, 

 and best at brood or body heat. 



Roll Cultures (After Esmarch's Method) . Small, round colo- 

 nies with fluid contents, under low power, a mass of motile 

 threads in the center, and at the edges a wreath-like border. 



High Slab-culture. With glucose gelatin, the growth at first 



