PATHOGENIC BACTERIA 



175 



seen in the bottom of the tube, with a general liquefaction of 

 the gelatin; gases develop and a somewhat unpleasant odor. 



I 



/ 



Fig. 107. Cultures in agar 

 of malignant edema, after 

 twenty-four hours, at 37 C. 

 (Frankel and Pfeiffer). 



Fig. 108. Bacillus of 

 malignant edema growing in 

 glucose - gelatin (Frankel and 

 Pfeiffer). 



Agar. The gases develop more strongly in this medium, and 

 the odor is more prominent. 



Guinea-pig Bouillon. In an atmosphere of hydrogen cloud- 

 ing of the entire culture-medium without any flocculent pre- 

 cipitate until third day. 



