454 



Vincent's Angina 



Neither the bacilli nor the spirals showed any progressive move- 

 ment, though with the dark-field illuminator they showed a slight 

 vibratile and rotary movement. No flagella were observed. 



Fig. 163. — Bacillus fusiformis. Pure culture grown forty-eight hours anae- 

 robically in the fluid of condensation of LofHer's blood-serum. (Ruth Tunnicliff 

 in "Journal of Infectious Diseases.") 



Cultivation. — The organisms were cultivated by Tunnicliff upon 

 the surface of ascitic fluid agar-agar (1:3) under strictly anaerobic 

 conditions at 37°C., and by Krumwiede and Pratt, also under strictly 



Fig. 164. — Bacillus fusiformis. Pure culture grown four days in ascites broth 

 (Ruth TunnicliS in "Journal of Infectious Diseases.") 



anaerobic conditions, upon ascitic fluid agar-agar and serum agar- 

 agar. The latter investigators isolated and studied cultures from 

 fifteen different sources. After two or three days the fusiform bacil- 



