OTHER IMPORTANT PATHOGENIC MICRO-ORGANISMS 181 



injections of anthrax vaccine. Care should be taken to 

 properly dispose of the carcass of any animal dead of 

 anthrax. 



Malignant Edema Bacillus. — A fairly long, thick rod 

 with square ends, Gram-negative, and forming spores. 

 It is a strict anaerobe. The infections in man are usually 

 the result of infecting wounds with garden earth. Pro- 



#' 





'^^A 



L 



Fig. 62.— Bacillus of malignant edema. Tissue juice of guinea- 

 pig after injection with a broth culture. Smear preparation, stained 

 with fuchsin. X 1000 (Frankel and Pfeiffer). 



phylaxis: The careful cleansing of all wounds, especially 

 those thought to be infected with earth. 



Bacillus Perfringens. — This organism, also known as 

 the bacillus of gas gangrene, Welch's bacillus, or the 

 Bacillus aerogenes capsulatus, is found in the intestinal 

 canal of man and animals and in soil and dust. When 

 introduced into wounds, as, for cxam})le, in the recent 



