OTHER IMPORTANT PATHOGENIC MICRO-ORGANISMS 175 



anthrax vaccine, Care should be taken to properly dis- 

 pose 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- 



Fig. 59. 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.. 



Typhus Fever. The causative organism, Bacillus typhi 

 exanthematici, has recently been isolated in pure culture 

 by Plotz, working in the laboratory of Mt. Sinai Hospital, 

 New York. The organism is a small, pleomorphic, Gram- 

 positive, anaerobic, non-motile, and non-acid-fast bacillus. 

 Most of the organisms are straight: occasionally some are 



